Heat the saucepan after the wine has been added. Growing molecular collisions that defeat the forces of intermolecular attraction. A portion of the wine starts to boil away almost instantly.
What's a good illustration of molecular attraction?Example: The polar H2O molecules are drawn to the sodium and chloride ions in the beaker when NaCl and water are combined there. This interaction's potency is determined by: how big the dipole moment is.
What draws molecules together?
Polar molecules line up so that their positive ends interact with each other's negative ends. Unlike the atoms' covalent bonds in a molecule (intramolecular bonding)
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Two basketballs are sitting 1 m apart and are not moving. Which best explains why the gravitational force does not cause the to move?
A. No gravitational force exists between the two objects Because they are not touching.
B. The gravitational force between the two objects is weak because they are 1 m apart.
C. No gravitational force exists between the two objects because their masses are small.
D. The gravitational force between the two objects is weak because their masses are small.
The gravitational force between the two objects is weak because their masses are small. The correct option to this question is D.
What is gravitational forceWhen the mass of either object doubles, the gravitational force between them doubles. If the mass of either object triples, the gravitational force between them triples. If the masses of both objects double, the gravitational force between them quadruples. etc
The gravitational force between two bodies of mass 1 kg at a distance of 1 m is:6.67N
As the two masses move, the value of G in Newton's law of universal gravitation is constant and does not change. Bringing two masses closer together increases the gravitational force between them, but never changes the value of G.
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What force is exerted on a machine? output force work input work output input force
Answer:
output force is exerted on a machine
Answer:
output force is exerted in the machine , i guess
2- A car spends two hours driving at 20 km/h, and then an hour driving at 50 km/h.
What is the average speed of the car?
A. 50 km/h
B. 45 km/h
C. 35 km/h
D. 30 km/h
When a car spends two hours driving at 20 km/h, and then an hour driving at 50 km/h. then the average speed of the car would be 30 km/h , therefore the correct answer is option D.
What is speed?The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object. The unit of speed is meter/second. The generally considered unit for speed is a meter per second.
The mathematical expression for speed is given by
average speed = total distance /Total time
As given in the problem A car spends two hours driving at 20 km/h, and then an hour driving at 50 km/h
The total distance covered by the car is
S =2×20 +1×50
=90 km
The total time taken by the car is
T = 3 hour
then by using the formula for the average speed
average speed = total distance /Total time
By substituting the respective values of the total speed and total time
average speed = 90/3 km/h
=30 km/h
Thus, The correct answer is option D because a car's average speed would be 30 km/h if it spent two hours traveling at 20 km/h and one hour traveling at 50 km/h.
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What did classical physics predict would happen to the light given off by an
object as its temperature increased?
A. The wavelength of the light would decrease from visible light into
the ultraviolet range.
B. The color of the light would fade to black as the brightness
decreased.
C. The color of the light would change to white, and the brightness
would decrease.
D. The wavelength of the light would decrease from visible light into
the infrared range.
Answer:
The Wavelength of the light would decrease from visible light into ultraviolet range A P E X
Explanation:
Classical physics predict that as the temperature is increased, the wavelength of the light would decrease from visible light into more energetic ultraviolet range.
What is classical physics?When an electric charge vibrates, an electromagnetic wave is produced. Remember that heat is simply the kinetic energy of random motion. In a hot object, electrons vibrate in random directions and produce light as a result.
A hotter object produces more energetic vibrations, and thus emits more light —- it glows brighter. So far, so good. However, classical physics was unable to explain the shape of the blackbody spectrum.
As per the classical physics concepts, as the temperature increases, the wavelength of light becomes shorter and shifts to higher energy regions. Therefore, option A is correct.
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The position of an object moving along a line is given by the function s(t)=−18t 2
+54t. Find the average velocity of the object over the following intervals. (a) [1,10] (c) [1,8] (b) [1,9] (d) [1,1+h] where h>0 is any real number. (a) The average velocity of the object over the interval [1,10] is −144 (b) The average velocity of the object over the interval [1,9] is −126 (c) The average velocity of the object over the interval [1,8] is −108 (d) The average velocity of the object over the interval [1,1+h] is
The average velocity of the object over the given intervals can be calculated using the position function s(t) = \(-18t^{2}\) + 54t. The average velocities are as follows: (a) -144, (b) -126, (c) -108, and (d) -18h + 36.
The average velocity of an object can be found by calculating the change in position divided by the change in time. In this case, we are given the position function s(t) = \(-18t^{2}\) + 54t.
(a) For the interval [1,10], the change in time is 10 - 1 = 9. To find the change in position, we evaluate s(10) - s(1):
s(10) = \(-18(10)^{2}\) + 54(10) = -1800 + 540 = -1260
s(1) = \(-18(1)^{2}\) + 54(1) = -18 + 54 = 36
Change in position = -1260 - 36 = -1296
Average velocity = Change in position / Change in time = -1296 / 9 = -144.
(b) For the interval [1,9], the change in time is 9 - 1 = 8. To find the change in position, we evaluate s(9) - s(1):
s(9) = -18(9)^2 + 54(9) = -1458 + 486 = -972
Change in position = -972 - 36 = -1008
Average velocity = Change in position / Change in time = -1008 / 8 = -126.
(c) For the interval [1,8], the change in time is 8 - 1 = 7. To find the change in position, we evaluate s(8) - s(1):
s(8) = \(-18(8)^{2}\) + 54(8) = -1152 + 432 = -720
Change in position = -720 - 36 = -756
Average velocity = Change in position / Change in time = -756 / 7 = -108.
(d) For the interval [1,1+h], the change in time is (1+h) - 1 = h. To find the change in position, we evaluate s(1+h) - s(1):
s(1+h) = \(-18(1+h)^{2}\) + 54(1+h) = -18(1 + 2h + h^2) + 54(1 + h) = -18 - 36h - \(18h^{2}\) + 54 + 54h = 36h - \(18h^{2}\) + 36
s(1) = \(-18(1)^{2}\) + 54(1) = -18 + 54 = 36
Change in position = (36h - \(18h^{2}\) + 36) - 36 = 36h - \(18h^{2}\)
Average velocity = Change in position / Change in time = (36h - \(18h^{2}\)) / h = 36 - 18h.
Therefore, the average velocities for the given intervals are (a) -144, (b) -126, (c) -108, and (d) 36 - 18h.
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A 80-kg man is standing on a scale in a 1120kg elevator that is traveling upward by a single cable. The scale measures 1000 N. (a) Draw a FBD of both the elevator and the man (b) What are the magnitude and direction of the acceleration of the elevator? (c) What is the tension on the cable
Answer:
Explanation:
a ) see attached file
b )
weight of man = 80 x 10 = 800 N
scale reading = 1000N .
Since scale reading is more than his weight , the elevator must be moving upwards .
Net force upwards = R - mg , R = reaction force = 1000N
Net force upwards = 1000 - 800 = 200 N
acceleration = net force / mass
= 200 / 80 = 2.5 m / s²
c )
If T be the tension
T - ( 80 + 1120 ) g = ( 80 + 1120 ) x 2.5
T = 15000 N
1. Complete the following statement: The angular measure 1.0 radian is equal to
A) 0.0175°.
B) 57.3°.
C) 1.57°.
D) 3.14°.
E) 6.28°.
The correct answer is B) 57.3°. This is because a radian is a unit of angular measure defined as the angle subtended at the center of a circle by an arc equal in length to the radius of the circle.
Angular measure is a unit of measurement used to describe an angle or the amount of rotation from a fixed point. It is typically expressed in units of degrees, minutes, and seconds. To convert radians to degrees, you can use the conversion factor: 1 radian = (180/π) degrees.
1.0 radian * (180/π) = 57.3°
So, the angular measure 1.0 radian is equal to: B) 57.3°.
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1. Sam walked 4 meters north, 5 meters east, and 4 meters south. What is his
distance? What is his displacement?
Answer:
His distance would be 80 or 13 something. I dont really understand this question. Just be sure to look into other answers pls.
Explanation:
Do tuning forks make sounds when hit from the vibrations? I'll give brainiest
Answer:
Yes
Explanation:
they make sound due to the fact that the vibration from the tuning fork itself interacts with the air around it. it's also worth mentioning that anything that vibrates creates sound waves as well.
see attached, thanks !
Answer:
B = Frictional force
What kinds of stars have either no habitable zones or very inferior ones
How much heat would be required to heat 10 grams of liquid water from 50 ºc to vapor at 100 ºc? report your answer in kj to one decimal place.
a single digit 10.5 kJ Justification: To just be able to resolve this issue.
What is an example of vapor?Evaporation (gas phase water) at ambient temperature and first atmosphere of pressure is the most typical example of a vapor. A vapor should not be confused with a mist, which is a fine dispersion of liquid droplets, or a dust, which is a fine dispersion of solid particles. Gas is a suitable substitute for the word vapor.
What does vapor in science mean?When a substance's gas and liquid forms are in equilibrium, as happens, for instance, whenever the temperature is sufficiently low enough for the substance to exist in either gaseous or liquid form, the state is referred to as a vapor.
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What statement best describes what happens when a pitcher throws a baseball with different amounts of force?
A.The mass of the baseball never changes so the more force in the pitchers arm, the higher the acceleration of the baseball before it leaves the pitcher's hand.
B.The mass of the baseball never changes and therefore neither does the acceleration of the baseball.
C.The mass of the baseball never changes so the more force in the pitchers arm, the lower the acceleration of the baseball before it leaves the pitcher's hand.
D.Baseballs do not accelerate as they go through the air.
Newton's second law allows us to find that the correct answer is:
A) The mass of the baseball never changes so the more force in the pitchers arm, the higher the acceleration of the baseball before it leaves the pitcher's hand.
Newton's second law gives a relationship between force and the product of mass and acceleration of the body
F = m a
Where F is the force, m the mass and the acceleration of the body. The bold indicate vectors
The baseball ball is a solid body that has a fixed mass, therefore the pitcher uses different forces in the arm, the acceleration must change proportionally, as the force increases, the acceleration must increase (fastball).
Let's review the different claims
A) true. These statements are in accordance with Newton's second law
B) False. If the force changes any of the other two parameters must change
C) false. Force and acceleration are proportional
D) False. When the ball is in the air it is subjected to the acceleration of gravity
With Newton's second law we find that the correct answer is:
A) The mass of the baseball never changes so the more force in the pitchers arm, the higher the acceleration of the baseball before it leaves the pitcher's hand.
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An observer notices that the sun is directly overhead at midday during the summer solstice. what is this observer's latitude upon the earth?
Answer:
At 23.5 deg north of the equator this person would see the sun directly overhead at the summer solstice at noon
In the data table , distance is measured in meters and time is in seconds. Calculate the mans average velocity using the equation (average velocity= total distance/total time.
Answer:
3.626 m/s
Explanation:
v=d/t
1. -0.02/0 = 0 m/s
2. 0.86/0.2 = 4.3 m/s
3. 1.71/0.4 = 4.275 m/s
4. 2.54/0.6 = 4.23 m/s
5. 3.32/0.8 = 4.15 m/s
6. 4.08/1.0 = 4.08 m/s
7. 4.79/1.2 = 3.99 m/s
8. 5.48/1.4 = 3.91 m/s
9. 6.15/1.6 = 3.84 m/s
10. 6.76/1.8 = 3.76 m/s
11. 7.37/2.0 = 3.66 m/s
12. 7.92/2.2 = 3.6 m/s
13. 8.45/2.4 = 3.52 m/s
14. 8.96/2.6 = 3.45 m/s
the mean of these numbers is 3.626
his average velocity ks 3.626 m/s
You have 16 kg of a radioactive sample with a certain half-life of 15 years. How much is left after 60 years?A. 8 kgB. 4 kgC. 2kgD. 1kgE. nothing
Given 16 kg of a radioactive sample with a certain half-life of 15 years:
To determine how much of the 16 kg radioactive sample is left after 60 years with a half-life of 15 years, we will use the following steps:
1. Calculate the number of half-lives that have passed: 60 years / 15 years per half-life = 4 half-lives
2. Calculate the remaining sample amount using the formula: remaining amount = initial amount * (1/2)^number of half-lives
3. Apply the formula: remaining amount = 16 kg * (1/2)^4 = 16 kg * 1/16 = 1 kg
After 60 years, 1 kg of the radioactive sample is left. The correct answer is D. 1kg.
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Based on its location on the periodic table, which element would be most likely to form a negative ion? A. Bromine (Br) B. Strontium (Sr) C. Potassium (K) D. Magnesium (Mg)
your answer is...
C. potassium
When a quality control test is performed to ensure that the penetrating ability of the x-ray beam is accurate, the result must be within what amount of the control panel setting
When a quality control test is performed to ensure that the penetrating ability of the x-ray beam is accurate, the result must be within what amount of the control panel setting will be ±4 kVp.
What is quality control?
Quality control entails testing units to see if they meet the standards for the final product.
The goal of the testing is to evaluate whether any corrective measures are required in the production process. Good quality control assists businesses in meeting customer needs for improved products.
When a quality control test is performed to ensure that the penetrating ability of the x-ray beam is accurate. The results must be under some limits.
Hence the result must be within what amount of the control panel setting will be ±4 kVp.
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What is the speed of a car if it has a mass of 1000 kg and kinetic energy of 32 kJ?
Answer:
8 m/s
Explanation:
K.E. = 1/2 m v^2
32 000 j = 1/2 (1000) v^2
v = 8 m/s
Explain the characteristics of galaxies and galaxy
clusters.
Answer:
Some of the key characteristics of galaxies and galaxy clusters include their size, shape, and structure. Galaxies and galaxy clusters are also distinguished by the presence of dark matter, a mysterious substance that is thought to make up most of the mass in the universe. Additionally, galaxies and galaxy clusters are important sites for the formation and evolution of stars and other celestial objects.
Explanation:
Galaxies are vast collections of stars, gas, and dust that are held together by gravity. They come in a variety of shapes and sizes, ranging from small, irregular galaxies to large spiral galaxies with well-defined arms. Galaxies also contain a central region known as the nucleus, which may be home to a supermassive black hole.
Galaxy clusters are groups of galaxies that are held together by gravity. They are the largest structures in the universe, and they can contain hundreds or even thousands of individual galaxies. Galaxy clusters are typically separated by vast distances, and they are bound together by the mutual gravitational attraction of their constituent galaxies.
The probability distribution for a
random variable x is given in the table.
-10
-5
0
5
10
15
20
Probability
.20
.15
.05
.1
.25
.1
.15
Find the probability that x < 20
Answer:
Explanation:
6
Probability for X<20 for given probability distribution is 0.85.
Probability is concern with possibility. It is a branch of statistics which deals with the occurrence of a random event. Sum of probabilities for a particular event is one. Probability has been introduced in statistics to predict how likely events are to happen. Probability means an extent to which something is likely to happen. To find the probability of a particular event to occur, firstly we must know the total number of possible outcomes. The distribution of probability for an event is called as probability distribution.
for example when a coin is tossed, it gives two possible outcomes Head and Tail. There is 50% of chance of getting Head or tail.
The Total probability is the sum of all the probabilities and it is always one.
In this problem Probability that x < 20,
P(x<20) = P(x<-10)+P(x<-5)+P(x<0)+P(x<5)+P(x<10)+P(x<15)
P(x<20) = 0.20+0.15+0.05+0.1+0.25+0.1 = 0.85
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HELP ME ASPP PLEASE THANK YOU
The 2 elements described below that are isotopes of boron, 5 protons, 6 neutrons. so, option (c) is correct.
What is isotopes ?
Isotopes are separate chemical elements with the same number of protons, electrons, and neutrons as their parent element but a different number of neutrons. We can infer from the definitions of atomic mass and atomic number given above that isotopes are elements with the same atomic number but differing masses.
What is elements ?
An essential element of a totality. In chemistry, a simple substance is one that cannot be divided into smaller components or transformed into another substance. An element's fundamental building block is an atom, which is made up of protons, neutrons, and electrons. The number of protons in an element's atoms is constant.
Therefore, 2 elements described below that are isotopes of boron, 5 protons, 6 neutrons.
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How fast does a 500kg car need to drive to have 100,000 J of kinetic energy?
Answer:
The car must move at 2 m/s to have a Ke of 2,000 Joules.
Explanation:
Mark me pls
Which change increases the electric forcWhich change increases the electric force between objects?e between objects?
Answer:
b
Explanation:
Which moon phase come after a new moon and before a first quarter moon?
What is the change in momentum of 10 kg object if a 60 Newton impulse is given to it?
If a 60 Newton-second impulse is given to an object, the change in momentum is 60 kg-m/s.
What is impulse?In physics, the term "impulse" is used to characterize or measure the impact of force operating gradually to alter an object's motion. It is often stated in Newton-seconds or kilograms per second and is denoted by the symbol J.
Impulse of force is = force applied × time interval = change in momentum.
Mass of the object is = 10 kg
Applied impulse is = 60 Newton-second.
Hence, change in momentum is = 60 kg-m/s, if a 60 Newton-second impulse is given to an object,
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You are investigating the eruption history of a volcano. You find that the volcano has generated multiple lava flows that spread over large areas over the past 10,000 years. There is very little tephra. People in the nearby town remember the last eruption, when lava flows caused some forest fires. Based on this description, how would you classify the state of the volcano?
O Active Recently Erupting
O Active-Dormant
O Lurking
O Extinct
Based on the given information, the most appropriate classification for the state of the volcano would be "Active-Dormant."
The volcano's history of generating multiple lava flows over the past 10,000 years indicates that it has been active in the relatively recent past. The presence of lava flows that have spread over large areas suggests ongoing volcanic activity, although not necessarily in the immediate present.
Additionally, the mention of very little tephra (volcanic ash and fragments) indicates that the volcano is not currently experiencing explosive eruptions. Instead, it has been primarily characterized by effusive eruptions that produce lava flows.
The fact that people in the nearby town remember the last eruption, which caused some forest fires, further supports the classification of the volcano as active-dormant. While the volcano may not be actively erupting at the moment, the memory of the recent eruption and the potential for future volcanic activity suggests that it is still in a state of activity, albeit in a relatively dormant phase.
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________ are actions that access believes will improve your database performance but may have consequences that should be considered first.
Denormalization involves combining database tables or duplicating data to reduce the number of joins and improve query performance.
Denormalization can enhance performance by eliminating the need for complex joins, thereby reducing the overall query execution time. However, it comes with trade-offs.
Increased data redundancy can lead to higher storage requirements and potentially inconsistent data if updates are not properly managed. Additionally, denormalization can make data modifications more complex and time-consuming.
While denormalization can provide performance benefits, it is crucial to carefully analyze the specific requirements and potential consequences before implementing it.
Considerations such as data integrity, maintenance overhead, and the nature of queries performed on the database should be thoroughly evaluated to ensure the benefits outweigh the drawbacks.
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A ferris wheel on a california pier is 27 m high and rotates once every 32 seconds in the counterclockwise direction. When the wheel starts turning, you are at the very top.
a. My angular position 75 s after the wheel starts turning is 140°.
b. My speed 75 s after the wheel starts turning is 2.7 m/s.
The complete question is in the attachment. A Ferris wheel performs uniform circular motion. Its height is equal to the diameter.
d = 27 mr = d ÷ 2 = 27 ÷ 2 = 13.5 mIt rotates once every 32 s, meaning the period = T = 32 s.
The angular velocity ω = 2π ÷ T
π = 3.14T = period (s)ω = angular velocity (rad/s)ω = 2π ÷ T
ω = (2 × 3.14) ÷ 32
ω = 6.28 ÷ 32 = 0.19625 rad/s
ω = 0.20 rad/s
The formula for angular position
θ = ωt
θ = angular position (rad)θ = ωt = 0.20 × 75 = 15 rad
θ = 15 × (360/2π)°
θ = 15 × (360/6.28)°
θ = 140°
The formula for tangential speed
v = ωR
v = tangential speed (m/s)ω = angular velocity = 0.20 rad/sR = radius of the wheel = 13.5 mv = ωR = 0.20 × 13.5
v = 2.7 m/s
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I NEED HELP ANSWER FAST WILL GIVE BRAINLY!!!!!!!
knowing the atomic number will also tell you what about an atom?
Answer:
the number of protons.
Explanation:
the atomic number is the number of protons in the nucleus of an atom. the number of protons Define the identity of an element.