Answer:
in the converson to cm³
l m= 100cm
what about :
l m³ = 1000×1000×1000
= 1000000cm³
After this we :
1 m³ = 1000000cm³
how about:
100m³ = 100 × 1000000cm³
= 100000000cm³
Empujamos un baúl 3 metros, para ello aplicamos una fuerza de 200 Newton. ¿Cuál es el trabajo realizado?
Answer:
Trabajo realizado = 600 Nm
Explanation:
Dados los siguientes datos;
Fuerza = 200 Newton
Distancia = 3 metros
Para encontrar el trabajo realizado; Trabajo realizado = fuerza * distancia
Sustituyendo en la ecuación, tenemos; Trabajo realizado = 200 * 3
Trabajo realizado = 600 Nm
For the situation described in the previous question, which cart experiences the greater change in kinetic energy? It's impossible to tell without knowing the initial velocities.
Cart 1 experiences the bigger change in kinetic energy, and this change is independent of the cart's beginning velocity.
An object's kinetic energy is the energy it has as a result of motion. Applying force is necessary if we wish to accelerate an object. We have to put forth work to apply a force. After the job is finished, the object will be travelling at a new, constant speed because energy has been transferred to it. The energy of motion, or kinetic energy, can be seen in the movement of an item or subatomic particle. Kinetic energy is present in every moving object and particle.The formula for kinetic energy is stated as K E = 1 2 m v 2. Where m is the body's mass, v is its velocity, and KE is its kinetic energy.
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A scientist wants to measure the thickness of an aeroplane wing using ultrasound.
She has an electronic source and timer which generates a sound wave of wavelength 20 cm and frequency 29000 Hz
She places the device on the top surface of the wing. It takes 0.32 ms for the sound wave to travel to the bottom of the wing and reflect back to the receiver.
Calculate the thickness of the wing to two significant figures.
Answer:
High pitch means small wavelength, and the size of a musical instrument is directly related to the wavelengths of sound it produces. So a small instrument creates short-wavelength sounds. Similar arguments hold that a large instrument creates long-wavelength sounds.
Explanation:
What is conserved in a thermodynamically closed system?
A. Both energy nor matter
B. Energy
C. Both energy and matter
D. Matter
Explanation:
C. Both energy and matter
a person who believes that nothing is known or can be known of the existence or nature of God or of anything beyond material phenomena; a person who claims neither faith nor disbelief in God.
Section 1 - Question 3
Electromagnetic energy can be used in the medical field to treat various diseases. In order for electromagnetic energy to be used for this purpose, it must be able to be targeted to very specific cells within
the body
Which of the following are characteristics of this type of electromagnetic energy
A
low frequency, short wavelength
B
low frequency, long wavelength
С
high frequency, short wavelength
CD
high frequency, long wavelength
Answer:
D
Explanation:
Waves with long wavelength and low energy are used more in medical field. High energy waves are hazardous to cells. Hence, option B is correct.
What are electromagnetic waves ?Electromagnetic waves are waves that can pass through vacuum as well as through a medium. They are associated with an electric field and magnetic field.
The electromagnetic waves which are longer in wavelength are radio waves, microwaves and IR. They have low frequency and lower in energy. Short wavelength high energy waves are UV, x-rays and gamma rays.
In medical field long wavelength waves are more used to treat disease such as cancer. Radio waves are used to treat cancer. High frequency, high energy waves are more used in diagnostic purposes. Such as in x-rays, detection of cancer cells etc.
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Two bumpers cars are headed for a collision at Rue Le Dodge on a Great America physics field trip. One bumper car has a mass of 46.3 kg heading to the right at 5.24 m/s, while the other has a mass of 55.4 kg headed in the opposite direction (to the left) at a speed of 1.79 m/s. If the two bumper cars collide, what will be the total momentum of both cars after the collision? Round your answer to two decimals.
The total momentum after collision is 143.466 kgm/s.
What is momentum of a body?
The momentum of a body is the product of the mass and the velocity of the body.
Momentum = mass * velocityAssuming the right direction as positive and left direction as negative:
Total Momentum before collision = Total Momentum after collisionMomentum to the right = 46.3 * 5.24 = +242.612 kgm/s
Momentum to the left = 55.4 * -1.79 = -99.166 kgm/s
Total momentum before collision = +242.612 kgm/s - 99.166 kgm/s
Total momentum before collision = 143.466 kgm/s
Thus, total momentum after collision is 143.466 kgm/s.
In conclusion, momentum is conserved in an isolated system of colliding bodies.
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A double inclined plane that moves is a(n) .
Answer:
a wedge.
Explanation:
it moves when you apply force to one end of the wedge.
WILL GIVE BRAINLIEST AND 10 POINTS!! An asteroid is hustling through the solar system, in the vicinity of the inner planets. Based on what you know about gravitational attraction, which planet is LEAST likely to attract the asteroid?
Answer:
mercury
Explanation:
The planet with the smallest mass must have the smallest gravitational pull - which is mercury, with a pull of approx. 0.38 times the Earth's gravitational pull.
a truck is moving with a certain uniform velocity. it is accelerated uniformly by 0.75 m/s^2.after 20 seconds, the velocity becomes 72 km/h. find the initial velocity
Answer:
\(\boxed{V_{i} = 5\ m/s}\)
Explanation:
Given:
Acceleration = a = 0.75 m/s²
Time = t = ?
Final Velocity = \(V_{f}\) = 72 km/hr = 20 m/s
Required:
Initial Velocity = \(V_{i}\) = ?
Formula:
a = \(\frac{V_{f}-V_{i}}{t}\)
Solution:
For \(V_{i}\) the formula becomes:
\(V_{i} = V_{f}-at\)
\(V_{i}\) = 20 - (0.75)(20)
\(V_{i}\) = 20 - 15
\(V_{i}\) = 5 m/s
In Case: If you want it in km/hr:
\(V_{i}\) = 5 * 3.6
\(V_{i}\) = 18 km/hr
Answer:
5 m/s
Explanation:
acceleration = 0.75 m/s²
time = 20 s
final velocity = 72 km/h = 20 m/s
initial velocity = ?
Apply formula for initial velocity.
\(u=-at+v\)
\(\sf a=acceleration\\t=time\\v=final \: velocity\\u=initial \: velocity\)
Solve for u.
\(u=-(0.75)(20)+ 20\)
\(u=-15+20\)
\(u= 5\)
How much work will the girl do if she pushes the lawnmower twice as far? guys helpppp!!
Answer: she will do double the work
Explanation:
100N×200m= 20000
Force applied by the girl is 100 Newtons
\(f = 10 N\)Displacement is twice :
\(d = 2 \times 200\)\(d = 400\)Solution :\( \large \boxed{ \mathrm{work \: \: done = f \times d}}\)
\(work \: done = 400 \times 100\)\(work \: done = 40000 \: joules\)\(work \: done = 40 \: kj\)_____________________________
\(\mathrm{ \#TeeNForeveR}\)
If 5.4 J of work is done in raising a 178 g apple, how far is it lifted? Assume
9 = 9.81 m/s?.
Answer in units of m. Answer in units of m.
Answer: The apple is lifted approximately 0.1232 m (rounded to four decimal places).
Explanation: To find the distance the apple is lifted, we can use the formula for work: work = force x distance.
The force required to lift the apple is equal to the weight of the apple, which can be calculated using the formula:
weight = mass x acceleration due to gravity.
we have work = weight x distance, 5.4 J = (0.178 kg x 9.81 m/s^2) x distance.
Solving for distance, we get a distance ≈ of 0.1232 m (rounded to four decimal places).
Here is an article on work, force, and distance in physics: https://byjus.com/physics/work-energy-power/#:~:text=The%20work%20done%20by%20a,only%20magnitude%20and%20no%20direction.
A bicycle has a front gear that is turned by a pedal and is connected by a chain to a
rear gear, which turns the rear wheel. If the pedal radius is 18.0 cm, the front gear
radius is 9.0 cm, the rear gear radius is 4.0 cm, and the rear wheel radius is 33.0
cm, what is the ideal mechanical advantage of the bicycle?
(A) 0.24
(B) 0.48
(C) 0.55
(D) 0.82
Answer:
Pedal / Front Gear = 18 / 9 = 2
Front Gear /Rear Gear = 9 / 4 = 2 1/4
Rear Gear / Wheel = 4 / 33 = .121
2 * 2 1/4 * .121 = ,55
C) Seems true
Continue taking reading until the water starts to be boil
Answer:
pogggs
Explanation:
Sara pushed a box of lab equipment along the ground, displacing it by 1 metre. By doing this, she has done __________ on the box of lab equipment.
Sara pushed a box of lab equipment along the ground, displacing it by 1 meter. she has done work on the box of lab equipment.
When a force is applied and an object is moved over a specified distance, a work has been completed. The following formula is used to calculate an object's work,
W = Fd
Where, F is the applied force, and d is the object's displacement.
When we apply force "F" to a block, the body moves with some acceleration or, additionally, its speed increases or decreases depending on the direction of the force. The system's kinetic energy changes as speed increases or decreases. Since we are aware that energy cannot be created or destroyed, it must be changed into another form. This perspective refers to it as completed work.Therefore ,Sara has therefore completed her work on the box of lab equipment when she moves it by 1 m.
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Susan, driving north at 59 mph, and Shawn, driving east at 55 mph, are approaching an intersection. What is Shawn's speed relative to Susan's reference frame? Express your answer to two significant figures and include the appropriate units
Shawn's speed relative to Susan's reference frame is approximately 21.33 mph.
To determine Shawn's speed relative to Susan's reference frame, we can use the concept of vector addition. Since they are moving in different directions, their velocities can be treated as vectors.
Let's consider Susan's reference frame as the stationary frame of reference. In this frame, Susan's velocity is 0 mph because she is not moving relative to herself. Therefore, we can calculate Shawn's velocity relative to Susan by considering their relative velocity.
Using vector addition, we can find the relative velocity by subtracting Susan's velocity vector from Shawn's velocity vector. Since Susan is driving north, her velocity vector would point upwards, while Shawn is driving east, so his velocity vector would point to the right.
The magnitude of Shawn's velocity relative to Susan's reference frame can be calculated using the Pythagorean theorem:
Relative speed = \(\sqrt{(Shawn's velocity)^2 - (Susan's velocity)^2}\)
Given:
Susan's velocity = 59 mph (north)
Shawn's velocity = 55 mph (east)
Relative speed = \(\sqrt{(55 mph)^2 - (59 mph)^2}\)
= \(\sqrt{3025 mph^2 - 3481 mph^2}\)
= \(\sqrt{(-455) mph^2}\)
≈ 21.33 mph
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Classify each process according to whether it does or does not produce a new substance.
cooking an egg
melting ice
fireworks exploding
evaporating puddle of water
rusting of a metal tool
dissolving of salt in water
Produces a New Substance
Does Not Produce a New
Substance
Resul
Glosse
Save
Submit
Аа
Langur
The processes under chemical change are: cooking an egg, fireworks exploding, and rusting of a metal tool.
The processes under physical change are: melting ice, evaporating puddle of water, and dissolving of salt in water.
Given:
The following process:
cooking an eggmelting icefireworks explodingevaporating puddle of waterrusting of a metal toolDissolving of salt in waterTo find:
The classify the processes in whether it does or does not produce a new substance.
Solution:
Chemical change is the change when a new substance is formed due to a change in the chemical composition of the substance.Physical change is the change in which no change in chemical composition takes place and the identity of the substance remains the same.Cooking an eggChemical change, due to change in atomic arrangement egg get solidified on cooking, a new substance is formed.
Melting icePhysical change, change in the state of matter is taking from solid to liquid, no new substance is formed.
Firework explodingChemical change. formation of carbon dioxide gas and sound energy, anew substance formed
Evaporating puddle of waterPhysical change, change in the state of matter is taking from liquid to gas, no new substance is formed.
Rusting of metal toolChemical change, formation of oxides on the surface of the metal tool due to reaction between air and metal, a new substance is formed.
Dissolving of salt in waterPhysical change, ions of salt in the solid state are changing into aqueous ions with no formation of new substance, no new substance is formed.
The processes under chemical change are: cooking an egg, fireworks exploding, and rusting of a metal tool.
The processes under physical change are: melting ice, evaporating puddle of water, and dissolving of salt in water.
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a 4kg box is resting on top of a shelf that is 2m high, what is the boxs gravitational potential relative to the floor
Answer:
80 J
Explanation:
PE = mgh
PE = (4 kg)(9.8 m/s^2)(2 m)
PE = 78.4 J and with sig figs, it would be 80 J
Tariah is riding on her bike at 4m/s (North). If she accelerates at a rate of 1.5 m/s^2 for 2 s, what is her final velocity?
ANSWER:
7 m/s
STEP-BY-STEP EXPLANATION:
Given:
Initial velocity (u) = 4 m/s
Acceleration (a) = 1.5 m/s^2
Time (t) = 2 s
We can calculate the final velocity using the following formula:
\(v=u+a\cdot t\)We replace and calculate the value of the final velocity:
\(\begin{gathered} v=4+2\cdot1.5 \\ v=4+3 \\ v=7\text{ m/s} \end{gathered}\)The final velocity is equal to 7 m/s.
My grass is dying and I believe that it is not getting enough water so I decided to conduct a experiment
Tyler and his family drove from Atlanta to Baltimore. They traveled a total of 678 miles over 2 days.
What is the reference point in this scenario?
Atlanta
Baltimore
678 miles
2 days
Answer:
atlanta
Explanation:
just took the test
The reference point in this scenario is Atlanta.
What is reference point of the journey?The can be described as the starting point of the entire journey.
From the given statements the family started the journey from Atlanta and then traveled to Baltimore.
Atlanta is the start point (reference point) while Baltimore is the destination (finishing point).
Thus, the reference point in this scenario is Atlanta.
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if the current is 0.4 A for the 20 ohm resistor, what is the value for the potential difference? ii) Would it be different for the 30 ohm resistor or the same?
Answer:potential difference is more or less like voltage. Using ohms, V=IR
Where V is Voltage
I is Current =0.4A
R is Resistance=20ohms
V=0.4*20
V=8V
Hence the potential difference will be 8V.
ii) V=0.4*30
V=12V
Explanation:
The voltage of potential difference is directly proportional to the current and the resistance. So if one increase or decrease, it will have impact on the other.
From the calculations, when the resistance increase, the voltage will increase to appreciate the change.
Static electricity is an excess of charge.
A. True
B. False
Answer:
Its true
Explanation:
The earth wire is now connected to the metal case of the washing machine. Explain why it would now be safe for a person to touch the metal case, even if the live wire touches the metal case.
When the earth wire is connected to the metal case of the washing machine, it provides an alternative pathway for electric current to flow if there is a fault, such as if the live wire touches the metal case. The earth wire is connected to the ground, which has zero potential, so any current that flows through the earth wire will not harm a person who touches the metal case. This is because the person's body is also at zero potential (ground potential) and there will be no potential difference (voltage) across the person's body, which means no electric current will flow through the person's body. Therefore, connecting the earth wire to the metal case of the washing machine ensures that any electrical faults will be safely conducted away from the person, reducing the risk of electric shock or electrocution.
According to the Law of conservation of energy, potential and kinetic energies should be the same. If they are not, explain in detail why this may be
Answer:
According to the law of conservation of energy, energy cannot be created or destroyed, although it can be changed from one form to another. KE + PE = constant. ... As the car coasts down the hill, it moves faster and so it's kinetic energy increases and it's potential energy decreases.
Explanation:
just simplify this on paraphraser.io you should be good
is the field line pattern created by a magnetic dipole far from the source of the fields the same as the field line pattern created by an electric dipole?
The electric field lines in sites far from the region between electric charges are analogous to the magnetic fields in locations far from the dipole.
What does a magnet dipole moment mean?A magnetic moment, also referred to as a dipole moments, is a measure of an object's tendency to align with a magnetic field. The "Magnetic Moment" is the magnetically pull and orientation of an electromagnetic or other object that produces a magnetic field. The magnetic moment is a type of vector quantity.
What are dipoles, magnetic and electric?The dipolar moment, which would be defined as the product of the torque a material receives in a magnetic field, is used to determine the distribution of both negative and charges in a system.
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Use Newton’s First Law of Motion and the concept of inertia to explain what happens to a person in a head-on car accident who is not wearing a seat belt. How does wearing a seat belt help?
Answer:
Newtons first law of motion explains what happens in a car crash because it basically states that the passenger will continue to travel at the same velocity until an unbalanced force acts on he or she. The force that will act upon he or she would be the window, so you should always wear a seat belt!
Explanation:
According to Newtons first law of motion, a passenger tends to continue in the state of uniform motion even after the accident which causes the passenger to move forward.
According to the Newtons first law of motion, an object will continue in a state of rest or uniform motion unless it is acted upon by an external force. This is also known as the law of inertia.
While in a car undergoing uniform motion and suddenly the car is involved in an accident which causes the vehicle stop abruptly, a person suddenly moves forward because of the tendency to continue in the former state of uniform motion according to Newtons first law.
A seat belt helps to prevent the person from suddenly moving forward in a way that may lead to injury as a result of the accident.
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radiation detector records 8700 counts in 1.00 min. assuming that the detector records all decays, what is the activity of the radiation source in (a) becquerels and (b) curies?
(a) The activity of the radiation source is 145 Bq. (b) The activity of the radiation source is 3.92 x 10^-3 Ci.
The activity of a radioactive source is defined as the rate of decay of radioactive atoms within it. The number of counts recorded by a radiation detector is proportional to the activity of the source. In this case, the detector recorded 8700 counts in 1 minute, so the activity of the source is 8700 counts per minute (cpm).
To convert cpm to becquerels (Bq), we use the conversion factor 1 Bq = 1 decay per second (dps), so the activity is 8700/60 = 145 Bq. To convert to curies (Ci), we use the conversion factor 1 Ci = 3.7 x 10^10 dps, so the activity is 145/3.7 x 10^10 = 3.92 x 10^-3 Ci.
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a submarine is stranded on the bottom of the ocean with its hatch 25 m below the surface. calculate the force needed to open the hatch from the inside, given it is circular and 0.45 m in diameter. air pressure inside the submarine is 1 atm.
So 245×10³ N/m the force needed to open the hatch from the inside.
We are aware that pressure rises as we go deeper into any liquid, even water.
Following are the changes in fluid pressure with depth.
P = ρgh
Here, represents the fluid's density.
The height of the liquid column is equal to h and the acceleration caused by gravity is g.
Keep in mind that gh represents the pressure increase caused by the liquid column, while the actual pressure would be
P = ρgh + P₀
P₀ is the atmospheric pressure
Hatch present at height 25m
Diameter of the hatch = 0.45m , Radius = 0.225m
Pressure inside the submarine = 1 atm
Pressure on hatch from outside = 1 atm + ρgh
Pressure from inside the submarine on the hatch = 1 atm
Net pressure on the hatch = ρgh
ρgh = 10³ × 9.8 × 25 = 245×10³ N/m.
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Water boils at 212°F. Which temperature is an equivalent temperature?
\(\mathrm {Hey, there!}\)
Let's solve your problem:
We will convert your number, 212°F, to Kelvin and Celsius.
212°F is equal to 100° Celsius.
Now, let's do the Kelvin convert.
To convert Celsius to Kelvin, we have to add 273.5 to the amount of Celsius.
100° + 273.5 = 373.5
We have all our conversions. Finally, let's set them out.
Fahrenheit: 212°F
Celsius: 100°C
Kelvin: 373.5°K