PHYSICS HIGH SCHOOL

Which would best reduce the amount of energy needed to pull a wagon up a ramp?1.Increasing the slope of the ramp
2.Reducing the friction between the wagon wheels
3.Reducing the length of the wagon handle
4.Increasing the friction between the wagon wheels

Answers

Answer 1
Answer:

Answer:

2.Reducing the friction between the wagon wheels

Explanation:

If the friction between the wagon wheels and the rail is reduced, then less force will be needed to pull the wagon up. This is because the friction force goes in the opposite direction of the movement, that is, friction force opposes the desired movement, making it more difficult.
Answer 2
Answer: 2.  reducing the friction between wagon weels

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What did William Penn think would attract new settlers to his colony in Pennsylvania?

Answers

The biggest thing that would attract them to Pennsylvania would be freedom for religious practices. He was a quaker, which is a type of a Christian, but wasn't very liked by Dutch and German and other types of Christians because he wasn't catholic or protestant. So he made a new colony where people would have religious freedom.

The number of electrons in the outer ring of the elements phosphorus,iodine,vanadium,cobalt,sodium,nitrogen,helium,gold,zinc

Answers

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Which of the following best describes the difference between speed and acceleration? A. Acceleration is the distance an object travels within a specific unit of time, whereas speed is the rate at which the acceleration or direction of an object is changing. B. Speed is the distance an object travels within a specific unit of time, whereas acceleration is the rate at which the speed or direction of an object is changing.

 C. Acceleration is the distance an object travels within a specific unit of time, whereas speed is a measure of the force necessary to change the acceleration of an object.

 D. Speed is the distance an object travels within a specific unit of time, whereas acceleration is a measure of the force necessary to change the speed of an objectWhich of the following best describes the difference between speed and acceleration?  A. Acceleration is the distance an object travels within a specific unit of time, whereas speed is the rate at which the acceleration or direction of an object is changing.
  B. Speed is the distance an object travels within a specific unit of time, whereas acceleration is the rate at which the speed or direction of an object is changing.
  C. Acceleration is the distance an object travels within a specific unit of time, whereas speed is a measure of the force necessary to change the acceleration of an object.
  D. Speed is the distance an object travels within a specific unit of time, whereas acceleration is a measure of the force necessary to change the speed of an object.

Answers

The option that best describes the difference between speed and acceleration is : ( B ) Speed is the distance an object travels within a specific unit of time, whereas acceleration is the rate at which the speed or direction of an object is changing.

Difference between and Acceleration and Speed

Acceleration is the rate of change of velocity with time while speed is the rate of change distance with time.

Acceleration is a vector quantity because it has magnitude and direction while speed is a scalar quantity.

Hence we conclude that Speed is the distance an object travels within a specific unit of time, whereas acceleration is the rate at which the speed or direction of an object is changing.

Learn more about vector quantity  : brainly.com/question/356987

Answer:

Speed is the distance an object travels within a specific unit of time, whereas acceleration is the rate at which the speed or direction of an object is changing.

(Apex) Pretest

A wave with a wavelength of 69 meters has a period of 13 seconds. What is the speed of the wave?5.3 m/s
897 m/s
0.19 m/s
41 m/s

Answers

5.3 m/s
-------------------------------
The answer to this is 5.3 cause if you divide both of 69 and 13 it equals 5.3

A student throws a rock horizontally from the edge of a cliff that is 20 m high. The rock has an initial speed of 10 m/s. If air resistance is negligible, the distance from the base of the cliff to where the rock hits the level ground below the cliff is most nearlya.5m
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e.200m

Answers

Answer:

c.20

Explanation:

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Answers

Energy or heat can be calculated in terms of the mass, temperature, and specific heat of a substance. This is given by the equation:

U = mCpΔT = mCp(Tf-Ti)

where:
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Cp = specific heat
ΔT = temperature difference

For this problem, you need to get the specific heat of granite which can be found in reliable chemistry/engineering books or websites. According to Engineering Toolbox website, the Cp of granite is 790 J/(kg-°C).

U = 17 kg (790 J/(kg-°C)) (21-45) = - 322,320 Joules

*Note: the sign is negative because energy was released
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