Although the sun releases all forms of electromagnetic radiation, visible light, ultraviolet light, and infrared light make up 99% of its rays (also known as heat). Additionally capable of emitting UV light, man-made lamps are frequently employed in scientific research.
What is Electromagnetic Radiation?Electromagnetic radiation, as used in classical physics, is the term used to describe the flow of energy, in the form of the electric and magnetic fields that make up electromagnetic waves like radio waves, visible light, and gamma rays, through a material medium or across empty space at the speed of light.
Time-varying magnetic and electric fields are linked to one another at right angles and perpendicular to the direction of motion in such a wave. The strength and frequency v of the time fluctuation of the electric and magnetic fields define an electromagnetic wave.
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Could someone please help me with this question?
Answer:
I linked a screen shot. The decimal version of that is:
11.03 (you want to use the positive version since you're working with area)
What order does energy flow: sun prodecer consumer?
Energy flows from the Sun to producers, then to primary consumers, secondary consumers, and potentially to tertiary consumers, forming a pyramid-shaped structure that represents the transfer of energy through different trophic levels in an ecosystem.
Energy flows in a specific order through various components of an ecosystem, starting with the Sun and progressing through producers and consumers. This flow of energy is known as the energy pyramid or trophic levels.
At the base of the energy pyramid is the Sun, which is the ultimate source of energy for most ecosystems on Earth. Sunlight provides the energy needed for photosynthesis, a process carried out by plants, algae, and some bacteria, collectively known as producers. These organisms convert solar energy into chemical energy through photosynthesis, using carbon dioxide and water to produce glucose and oxygen. This process captures and stores energy in the form of organic compounds.
The next level in the energy pyramid consists of primary consumers, also known as herbivores. These are animals that feed directly on producers, such as grazing animals or insects that consume plants. Herbivores obtain energy by consuming plant material and breaking down the organic compounds present in the plants into simpler forms, such as sugars and amino acids, through digestion.
Above the primary consumers are the secondary consumers, which are carnivores or omnivores that feed on herbivores. They obtain energy by consuming primary consumers and breaking down the organic compounds in their prey through digestion. This energy transfer continues up the trophic levels, with each level consuming the one below it.
At the top of the energy pyramid are tertiary consumers, which are typically apex predators. They are carnivores that consume other carnivores. Tertiary consumers obtain energy by consuming secondary consumers and breaking down the organic compounds in their prey.
It's important to note that energy is not efficiently transferred between trophic levels. Only a fraction of the energy consumed at each level is converted into biomass and passed on to the next level. This inefficiency is due to processes such as respiration, heat loss, and incomplete digestion.
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Acceleration is the change in speed over the time
taken. A hungry cheetah spots a gazelle and decides to
chase it. The cheetah accelerates at 10 m/s² from rest
until it reaches 20 m/s. How long did this take?
vf=vi+at
20=0+10.t
20=10t
t=2 s
In 2012, NASA sent the 900kg Curiosity robot to Mars to study the planet. a) Recall the relationship between the weight P and the mass m. Specify the units. b) What is the weight of Curiosty on Mars? c) Compare the weight of Curiosity on Earth and on Mars. Why is it more important on Earth
(a)The units for weight are typically expressed in Newtons (N), while mass is measured in kilograms (kg).
(b)The weight of Curiosity on Earth is approximately 8820 Newtons.
a) The relationship between weight (P) and mass (m) is given by the formula P = m * g, where g represents the acceleration due to gravity. The units for weight are typically expressed in Newtons (N), while mass is measured in kilograms (kg).
b) To calculate the weight of Curiosity on Mars, we need to determine the acceleration due to gravity on Mars. The acceleration due to gravity on Mars is approximately 3.71 m/s². Using the weight formula, we have P = m * g = 900 kg * 3.71 m/s² = 3339 N. Therefore, the weight of Curiosity on Mars is approximately 3339 Newtons.
c) The weight of Curiosity on Earth is significantly greater compared to its weight on Mars. On Earth, the acceleration due to gravity is approximately 9.8 m/s². Using the weight formula, we have P = m * g = 900 kg * 9.8 m/s² = 8820 N. Therefore, the weight of Curiosity on Earth is approximately 8820 Newtons.
The difference in weight between Earth and Mars is important because weight is directly related to the force of gravity. The greater weight on Earth indicates a stronger gravitational force, which affects the overall dynamics and requirements for missions like Curiosity.
It affects the launch and landing processes, the structural integrity of the spacecraft, the fuel and energy requirements, and the ability to conduct experiments and operate the robotic systems effectively. Understanding these differences is crucial for mission planning, spacecraft design, and mission success.
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Compared to the charge of proton,the charge of an electron has A) The greater magnitude and opposite sign B) The same magnitude and the opposite sign C) The same magnitude and the same sign D) The greater magnitude and the same sign
Answer:
C. I'm pretty sure because I just took that test but I'm not sure
Two bumper car in an amusement park ride collide elastically as on approaches the other directly from the rear. Car A has a mass of 450kg and car B 550kg, owing to differences in passenger mass. If car A approaches at 4.5m/s and car B is moving at 3.7m/s, calculate (a) their velocities after collision, and (b) the change in momentum of each.
Answer:
VA = 3.62 m/s
VB = 4.42 m /s
Change of momentum of A = -396 kgm/s
Change of momentum of B = 396 kgm/s
Explanation:
Asuming A and B move to the right after the collision
pbefore = pafter
4.5*450 + 3.7*550 = 450VA + 550VB
In a elastis collition, the coefficient of restitution is 1
1 = (VB - VA)/(4.5 - 3.7)
VB - VA = 0.8
VB = 4.42 m/s
VA = 3.62
Change of momentum of A = 450*(3.62-4.5) = -396 kgm/s
Change of momentum of B = 550*(4.42-3.7) = 396 kgm/s
A rectangle has a length of of ( 2.3 +-0.2) m and a width of (1.2+-0.2) Calculate the area and the perimeter of the rectangle and give the uncertainty In each value
Remember that if x and y are two measurements:
\(\begin{gathered} x=x_0\pm\delta x \\ y=y_0\pm\delta y \end{gathered}\)Then, the uncertainty in the sum and the product of x and y are given by:
\(\begin{gathered} x+y=(x_0+y_0)\pm(\delta x+\delta y) \\ x\cdot y=(x_0\cdot y_0)\pm(x_0\cdot\delta y+y_0\cdot\delta x) \end{gathered}\)Additionally, the uncertainty of a constant multiplied by a measurement is given by:
\(kx=kx_0\pm k\cdot\delta x\)The perimeter and the area of a rectangle with dimensions L and W are:
\(\begin{gathered} P=2(L+W) \\ A=L\cdot W \end{gathered}\)Replace L = ( 2.3±0.2) m and W = (1.2±0.2)m to find the perimeter and the area of the rectangle with the corresponding uncertainty:
\(undefined\)\(\begin{gathered} P=2\left(\left[2.3±0.2\right]+\left[1.2±0.2\right]m\right) \\ =2\left(\left[2.3+1.2\right]\pm\left[0.2±0.2\right]\right)m \\ =2(3.5\pm0.4)m \\ =(7.0\pm0.8)m \end{gathered}\)\(\begin{gathered} A=(2.3±0.2)m\cdot(1.2±0.2)m \\ =(\lbrack2.3\cdot1.2\rbrack\pm\lbrack1.2\cdot0.2+2.3\cdot0.2\rbrack)m^2 \\ =(2.76±\lbrack0.24+0.46\rbrack)m^2 \\ =(2.76±0.7)m^2 \end{gathered}\)Therefore, the area and the perimeter of the rectangle are:
\(\begin{gathered} A=(2.76±0.7)m^2 \\ P=(7.0±0.8)m \end{gathered}\)iv. When you use a hand pump to inflate the tires of your bicycle, the pump gets warm after a while. Why? What happens to the temperature of the air in the pump as you compress it? Why does this happen? When you raise the pump handle to draw outside air into the pump, what happens to the temperature of the air taken in? Again, why does this happen?reason
Answer:
The temperature rises because for a given volume of gas, a rise pressure of the gas in pressure results in a proportionate rise in the temperature of the gas
Similarly when the handle is raised to draw air causes a fall in pressure that results in proportionate fall in temperature, for a given volume of gas
Explanation:
From Gay-Lussac's law, states that the pressure of a given mass of gas is directly proportional to its Kelvin temperature, provided that the volume is held constant
Mathematically, the law states that Pressure ∝ Temperature, at constant Volume
Therefore;
P₁/T₁ = P₂/T₂
Similarly, by kinetic theory of gases, we have;
The
\(P = \dfrac{n \cdot MW \cdot v_{rms}^2}{3 \cdot V}\)
\(v_{rms} = \sqrt{\dfrac{3 \cdot R \cdot T}{MW} }\)
Therefore, as in order for the hand pump to inflate the bicycle tires, the air in the pump has to be compressed to force it into the tire, thereby increasing the pressure, of the air in a given volume of the pump which results in the raising of the temperature of the air in the pump, which raises the temperature of the wall of the pump.
The temperature of the air in the pump also falls as the pressure in the pump is reduced by raising the pump handle, to reduce the air pressure inside the pump and and allow air to be taken into the pump.
A planet orbits the Sun
every 4.5 years. uniform or non uniform velocity?
electrical force is much weaker than the force of gravity true or false.
Answer:
false
Explanation:
The electrical force is much weaker than the force of gravity. False. Thomas Edison argued that our electrical system should use direct current because he felt that alternating current was dangerous.
Answer:
False
Explanation:
electrical force is billions and trillions and trillions times stronger than gravity. Gravity is a weak force compared to electrical force.
brainliest would be appreciated?
a)
Between which two points is the magnitude of distance covered same as
the magnitude of the displacement. (1mark)
Answer:
Distance covered is equal to all the distance traveled.
So for example, if you go from A to B, and then from B to C, the total distance covered is AB + BC.
Displacement is equal to the difference between the final position and the initial position.
So if we go from A to B, the displacement is simply the line AB.
While if we go from A to B, and then from B to C, the displacement will be a segment that directly connects A and C, such that:
displacement = √( (AB)^2 + (BC)^2)
Now, if we want to find the points such that the magnitude of the distance covered is equal to the magnitude of the displacement, we need to look at the pairs that are directly connected by a straight line.
Those are:
A to B ( or B to A)
B to C (or C to B)
C to D (or D to C)
Explain where energy goes once it is used.
Consider two cars, a 700kg Porsche and a 600kg Honda Civic. The Porsche is speeding along at 40 m/s (mph) and the Civic is going half the speed at 20 m/s. If the two cars brake to a stop with the same constant acceleration, lets look at whether the amount of time required to come to a stop or the distance traveled prior to stopping is influenced by their initial velocity.
1. A car traveling 5m/s slams on its brakes, creating an acceleration of -2 m/s^2. How far did the car travel after it applied its brakes?
2. The same car traveling for 10m/s applies the same acceleration of -2 m/s^2. How far did the car travel after it applied its brakes?
Answer:
Explanation:
To find the distance covered by the car after it applied brakes, we use 3rd equation of motion.
2as = Vf² - Vi²
s = (Vf² - Vi²)/2a
1.
We have:
Vi = Initial Velocity = 5 m/s
Vf = Final Velocity = 0 m/s (Since, car finally stops)
a = deceleration = - 2 m/s²
s = distance covered by the car = ?
Therefore,
s = [(0 m/s)² - (5 m/s)²]/2(- 2 m/s²)
s = 6.25 m
2.
We have:
Vi = Initial Velocity = 10 m/s
Vf = Final Velocity = 0 m/s (Since, car finally stops)
a = deceleration = - 2 m/s²
s = distance covered by the car = ?
Therefore,
s = [(0 m/s)² - (10 m/s)²]/2(- 2 m/s²)
s = 25 m
Hence, the distance traveled by the car is affected by the initial speed in accordance with a direct relationship.
A force of 14N acts at an angle of 235° to the positive x-axis. Resolve this force into components parallel to the x- and y- axis.
The x component of the force is -8.03 N.
The y component of the force is -11.47 N.
What are the parallel components?The parallel components of the force is resolved into x and y components as follows;
The x component of the force is calculated as follows;
Fx = F cosθ
where;
θ is the angle of inclination of the forceF is the magnitude of the forceFx = 14 N x cos (235)
Fx = -8.03 N
The y component of the force is calculated as follows;
Fy = F sinθ
where;
θ is the angle of inclination of the forceF is the magnitude of the forceFy = 14 N x sin (235)
Fy = -11.47 N
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ONE sound wave travels through two containers of different gasses. Wave through container 1 has a wavelength of 1.2 m. Wave through container 2 has a wavelength of 3.6 m. The frequency of wave through container 2 must be __________ the frequency of wave through container 1.
a. one-ninth
b. one-third
c. the same as
d. three times larger than
6 Fig. 6.1 is a full-scale diagram that represents a sound wave travelling in air
direction of travel
Fig. 6.1
(a) On Fig. 6.1, mark two points, each at the centre of a different compression. Label both of the
points C.
(b) The speed of sound in air is 330 m/s.
Measure the diagram and determine the frequency of the sound.
From the measured wavelength from diagram, the frequency of the sound is 6660 Hz.
What is the frequency of a wave?The frequency of a wave is the number of complete oscillation per second completed by a wave.
Frequency is related to wavelength and speed by the following formula:
Frequency = velocity/wavelengthVelocity of sound in air = 330 m/s
The measured wavelength = 5.0 cm = 0.05 m
Frequency = 330/0.05 = 6660 Hz
Therefore, based on the measured wavelength from diagram, the frequency of the sound is 6660 Hz.
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Show that an electron falling from n = 4 to n = 3 in the hydrogen atom will produce a photon in the infrared region.
The wavelength of the light is 1.92 * 10^-6 m which corresponds to the infrared region as shown in the image attached.
What is the energy of the hydrogen atom?We know that the hydrogen atom has electrons that occupy energy levels that are in conformity with the Bohr model. According to the Bohr model, electrons can move from a higher to a lower energy level.
We now have;
1/λ = RH (1/\(n_{2} ^2\) - 1/\(n_{1}^2\))
λ = wavelength
RH = Rydberg constant
The initial and the final levels are also shown therefore;
1/λ = 1.097 * 10^7 ( 1/3^2 - 1/4^2)
1/λ= 1.097 * 10^7 (0.11 - 0.0625)
λ=1.92 * 10^-6 m
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5. [6.67/10 Points] DETAILS
MY NOTES
ASK YOUR TEACHER
N/C
(a) Determine the electric field strength at a point 1.00 cm to the left of the middle charge shown in the figure below. (Enter the
magnitude of the electric field only.)
6.00 μC
1.50 μC -2.00 μC
3.00 cm
Submit Answer
PREVIOUS ANSWERS
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(b) If a charge of -6.13 µC is placed at this point, what are the magnitude and direction of the force on it?
magnitude
N
direction
SERCP11 15.3.P.018. 2/5 Submissions Used
2.00 cm →
As the charge is negative, the force, which has a magnitude of 33.05 N, is directed to the left, against the electric field.
What is the electric field's intensity at a specific distance from the point charge E?E is a symbol for the magnitude of the electric field at a specific distance from a point charge. At twice the distance from the point charge, what is the electric field's strength? The field's strength is E/2 at twice the distance. The field's strength is still equal to E at a distance that is twice as great.
E = k*q/r²
r1 = 2.00 cm
r2 = 1.00 cm + 3.00 cm = 4.00 cm
r3 = 1.00 cm
Using these distances, we can calculate the electric field due to each charge:
E1 = kq1/r1² = (9.0 x 10⁹ Nm²/C²) * (1.50 x 10⁻⁶ C) / (0.02 m)² = 168.75 N/C (to the right)
E2 = kq2/r2² = (9.0 x 10⁹ Nm²/C²) * (-2.00 x 10^⁻⁶ C) / (0.04 m)² = -112.50 N/C (to the left)
E3 = kq3/r3² = (9.0 x 10⁹ Nm²/C²) * (6.00 x 10⁻⁶ C) / (0.01 m)² = 5.40 x 10⁶ N/C (to the right)
E = E1 + E2 + E3 = 168.75 N/C - 112.50 N/C + 5.40 x 10⁶ N/C = 5.39 x 10⁶ N/C (to the right)
F = q*E
F = (-6.13 x 10 C) * (5.39 x 10⁶ N/C) = -33.05 N
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the long-term average weather for a region is called
Answer:
Climate.
Explanation:
Weather can be defined as the atmospheric conditions of a particular area over a short period of time.
The elements of weather include precipitation, wind, temperature, atmospheric pressure, relative humidity, cloud, and wind speed.
The long-term average weather for a region is called climate.
This ultimately implies that, when the average atmospheric conditions prevailing in a specific region persists for a very long period of time, it is known as climate.
Find the Magnitude of the resultant vector (the actual
path of the boat).
The picture is a little blurry, so here are the stats:
Velocity of the boat is 0.75 m/s
Velocity of the river is 1.2 m/s
The magnitude of the resultant vector, representing the actual path of the boat, is approximately 1.42 m/s.
To find the magnitude of the resultant vector, we need to consider the boat's velocity and the velocity of the river. The boat's velocity is given as 0.75 m/s, and the river's velocity is given as 1.2 m/s.
Since the boat is moving in a river, we can think of the boat's velocity as a combination of two velocities: its own velocity and the velocity of the river. The resultant vector represents the actual path of the boat, considering both velocities.
To calculate the resultant vector, we can use vector addition. The magnitude of the resultant vector can be found by taking the square root of the sum of the squares of the boat's velocity and the river's velocity. Mathematically, we have:
Resultant magnitude = √(boat velocity^2 + river velocity^2)
Plugging in the given values, we have:
Resultant magnitude = √(0.75^2 + 1.2^2)
= √(0.5625 + 1.44)
= √2.0025
≈ 1.42 m/s
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2.
A rock, mass 4 kg, and a 1 kg stone fall freely from rest from a height of
100 m. After they fall for 2 seconds, the ratio of the rock's speed to the
stone's speed is
Answer:
44.72m/s
Explanation:
use th formula:vf²=vi²at
and then substitute the values
remember the units
If there is no air resistance, the speed of the free falling object from the same height will be the same. Therefore, the ratio of speed of the stone to that of rock for 2 seconds falling will be 1 : 1.
What is free falling ?An object freely falling under the force of gravitation is called the free falling body. Here, the acceleration of the object is the acceleration due to gravity.
For a freely falling body, the velocity v = g t
where g is the acceleration due to gravity and for earth g is 9.8 m/s².
Everybody falls with the same rate freely under the acceleration due to gravity if there is no air resistance at all.
Here, the time t = 2 s
then v = 9.8 m/s² × 2 s = 19.6 m/s.
the speed of both the rock and stone will be 19.6 m/s in the absence of air resistance. Hence, the ratio of their speed is 1 : 1.
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Drag the tiles to the correct boxes to complete the pairs.
Identify the type of potential energy described.
Tiles
gravitational
chemical
magnetic
elastic
electric
Answer:
those are all correct. The arrows are matched correctly
A 20 g fridge magnet is being held onto a fridge by a 0.9 N force. What is the normal force?
Given:
Mass of fridge = 20 g
Force = 0.9 N
Let's find the normal force.
Here, the magnet is at rest. SInce it is at rest, the upward and downward force will balance each other.
F = mg
Also, the inward and outward force will baclence each other.
N = Fb
Hence:
N = 0.9 N
Therefore, the normal force acting on the magnet is 0.9 N.
ANSWER:
0.9 N
How far does a person travel in coming to a complete stop in 38 ms at a constant acceleration of 60 g ?
The distance traveled by the person to come to a complete stop in 38 ms at a constant acceleration of 60 g is approximately 273.42 meters.
The distance that a person covers to come to a complete stop in 38 ms at a constant acceleration of 60 g can be calculated using the kinematic equation.
The formula is given by, d = (v^2 - u^2) / 2a, where d is the distance traveled, v is the final velocity, u is the initial velocity, and a is the acceleration given in g units.
To solve the problem, we need to first convert the acceleration given in g units to meters per second squared (m/s²). We know that 1 g is equivalent to 9.8 m/s².
Hence, 60 g is equivalent to 60 × 9.8 m/s² = 588 m/s².
Substituting the values in the above formula, we get,d = (0 - u^2) / 2a= u^2 / 2a, since the final velocity is 0 when the person comes to a complete stop= u^2 / 2 × 588= u^2 / 1176 m
The time taken, t = 38 ms = 0.038 s.
Now, we know that acceleration, a = (v - u) / t.
We can rearrange the above equation to find the final velocity, v. We get,v = u + at
Substituting the values, we get,588 = u + (588 × 0.038)u = 588 - (588 × 0.038)u = 567.816 m/s
Using the value of u, we can now find the distance traveled using the kinematic equation as, d = u^2 / 1176= (567.816)^2 / 1176≈ 273.42 m.
Therefore, the distance traveled by the person to come to a complete stop in 38 ms at a constant acceleration of 60 g is approximately 273.42 meters.
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For the statements based on whether they are described as outcomes of results from thermal energy being added or removed particles move faster particles move slower temperature increases temperature decreases kinetic energy increases kinetic energy decreases thermal energy added thermal energy removed
If a giant molecular cloud is a distance of 21 pc away from Earth and drifts at a speed of 21 km/s toward Earth, how long (in years) would it take to reach Earth if the Sun remained at its current position?
The time it would take it to reach Earth if the Sun remained at its current position is 978,349.5 years.
What is the time of motion of the giant molecular cloud?
The time of motion of the giant molecular cloud is the time take for the giant molecular cloud to reach the earth.
Mathematically, the time taken for the giant molecular cloud to reach the earth is given as;
time = distance / speed
where;
the distance = 21 pc = 6.48 x 10¹⁴ kmspeed of the cloud = 21 km/stime of motion = (6.48 x 10¹⁴ km) / (21 km/s)
time of motion = 3.086 x 10¹³ seconds = 978,349.5 years.
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7. State condition of equilibrium when a borly is acted upon by a number of parallel forces. A uniform metal tube of length 5cm and mass 9 kg is suspended horizontally by two vertical wire attaches at 50cm and 150cm respectively from the ends of the tuber Find the tension in each wire. in tril Solution -
According to the question the tension in each wire is 1.96 N.
What is tension?Tension is a term that describes the psychological and physical state of a person or system in which there is a high degree of stress, uncertainty, and anxiety. It is often associated with conflict and is often experienced when individuals or groups feel threatened or constrained in some way. Tension can be experienced in a variety of different contexts, from interpersonal relationships to the workplace. It can result from a variety of different factors, including a lack of communication, conflicting goals or expectations, and unmet needs.
The body is in equilibrium when the sum of all forces acting on it is equal to zero. In this case, the forces acting on the metal tube are the two wires and the weight of the tube due to gravity.
The tension in each wire is equal to the weight of the tube divided by the length of the tube. This is because the tube is suspended horizontally, so the forces in each wire must be equal in order to keep the tube in equilibrium.
Therefore, the tension in each wire is:
T = (9 kg × 9.8 m/s2) / (5 cm × 0.01 m)
= 1.96 N
Therefore, the tension in each wire is 1.96 N.
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An object is attached to a trolley with a 0.80 kg mass, which is then pushed into an identical trolley at a speed of 1.1 m / s. The two trolleys couple together and move at a speed of 0.70 m / s after the collision. Calculate the mass of the object.
The mass of the object is approximately 0.457 kg.
The mass of the object attached to the trolley can be calculated using the principle of conservation of momentum. Since the two trolleys couple together and move as a single system after the collision, the total momentum before and after the collision should be the same. Given the mass of one trolley is 0.80 kg and the initial speed is 1.1 m/s, the momentum before the collision is 0.80 kg * 1.1 m/s = 0.88 kg·m/s. After the collision, the total mass is the sum of the two trolleys, and the final speed is 0.70 m/s.
Using the momentum equation, the mass of the object can be calculated as follows:
Total momentum before collision = Total momentum after collision
0.88 kg·m/s = (0.80 kg + mass of the object) * 0.70 m/s
Solving for the mass of the object, we get:
0.88 kg·m/s = (0.80 kg + mass of the object) * 0.70 m/s
0.88 kg·m/s = 0.56 kg + 0.70 kg * mass of the object
0.88 kg·m/s - 0.56 kg = 0.70 kg * mass of the object
0.32 kg = 0.70 kg * mass of the object
Dividing both sides by 0.70 kg, we find:
mass of the object = 0.32 kg / 0.70 kg = 0.457 kg
The two trolleys collide and couple together, the total momentum before the collision is equal to the total momentum after the collision according to the principle of conservation of momentum.
The momentum of an object is defined as the product of its mass and velocity. In this case, the mass of one trolley is known (0.80 kg) and the initial speed is given (1.1 m/s), allowing us to calculate the momentum before the collision.
After the collision, the two trolleys move together at a new speed (0.70 m/s). By setting the initial momentum equal to the final momentum and solving for the unknown mass of the object, we can find its value.
In the calculation, we subtract the masses of the two trolleys from the total mass in order to isolate the mass of the object.
Dividing the difference in momentum by the product of the known mass and the new speed, we obtain the mass of the object. In this case, the mass of the object is approximately 0.457 kg.
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Which of the following statements are not true regarding sound?
I. It can travel through any kind of matter, as well as a vacuum
II. The speed of sound is the same in all materials
III. The speed of sound is fastest in gases and slowest in solids
Answer:
All are not true.
Explanation:
Sound needs medium to travel.
sound speed is fastest in solids.
PLEASE HELP ME SOLVE THIS QUESTION, I NEED THE SOLUTION URGENTLY.
About 3.9 x 10⁴ N/C is the size of the electric field caused by the two fixed charges at point P, option D.
How to calculate charge?To find the magnitude of the electric field at point P, use the formula for electric field:
Electric field = k × (Q₁/r₁² + Q₂/r₂²)
where k = Coulomb's constant, Q₁ and Q₂ = charges, and r₁ and r₂ = distances between the point P and the charges Q₁ and Q₂, respectively.
First calculate the distance r₁ as follows:
r₁ = √[(3.0 m)² + (130 m)²] = 130.8 m
Similarly, calculate the distance r₂ as follows:
r₂ = √[(3.0 m)² + (130 m + 5.0 m)²] = 135.2 m
Now substitute the values into the formula and get:
Electric field = (9.0 x 10⁹ N×m²/C²) × [(5.0 x 10⁻⁶ C)/(130.8 m)² + (8.0 x 10⁻⁶ C)/(135.2 m)²]
Electric field = 3.9 x 10⁴ N/C (approximately)
Therefore, the magnitude of the electric field at point P due to the two fixed charges is approximately 3.9 x 10⁴ N/C.
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