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Mariana [72]
3 years ago
8

Which of the following statements most accurately differentiates potential and kinetic energy?

Physics
2 answers:
oksian1 [2.3K]3 years ago
8 0
A. Definitely this, because when I read this I exactly knew what it was, which I already did but..
lianna [129]3 years ago
8 0

Answer:

A. Any object that has motion has kinetic energy, while any object not in motion but with the potential to do work has potential energy.

Explanation:

Kinetic energy is associated to the motion energy in which object moves with certain speed.

It is given by the formula

E_k = \frac{1}{2}mv^2

Now similarly we can define potential energy as the energy stored in an object which is due to its position and the object must be at rest.

It may be of gravitational potential energy or spring potential energy or any other type

Gravitational potential energy is given as

E_p = mgh

both kinetic energy and potential energy is part of mechanical energy

so correct answer would be

A. Any object that has motion has kinetic energy, while any object not in motion but with the potential to do work has potential energy.

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Which of the following has mechanical energy?
KATRIN_1 [288]
Mechanical energy can have mechanical systems. The only mechanical system in the list is the compressed spring. A car battery and a glowing incandescent lightbulb have electrical energy, a nucleus of atom has potential (internal) energy.

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3 years ago
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Which of the following has the lowest U value?
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Answer:

c. expanded polyurethane

Explanation:

Thermal performance of a building fabric is measured in terms of heat loss and is expressed as U-value or R-value. U-value is the rate of heat transferred through a structure divided by the difference in temperature across the structure with a unit of measurement of W/m²K.You can calculate the U-value of a by getting the reciprocal of the sum of thermal resistances , R, making the building material.

If you have the value of R, then U=1/R

Material                         size            R                      U

plywood                          1"              1.25                0.8

Poured concrete            2"              0.99               1.010

Expanded polyurethane  1"            6.5                   0.1538

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The material with lowest U-value is expanded polyurethane

4 0
3 years ago
HELP PLSSSSSSSSSS<br> lithium has three protons. which model shows a neutral atom of lithium?
wolverine [178]

Answer:

B

Explanation:

the 3 electrons makes it neutral

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3 years ago
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Give reason Pascal is a derived unit​
Stells [14]

Answer:

Pascal is a derived unit because <u>it</u><u> </u><u>cannot</u><u> </u><u>be</u><u> </u><u>expressed</u><u> </u><u>in</u><u> </u><u>any</u><u> </u><u>physics</u><u> </u><u>terms</u><u>,</u><u> </u><u>but</u><u> </u><u>it</u><u> </u><u>is</u><u> </u><u>an</u><u> </u><u>expression</u><u> </u><u>of</u><u> </u><u>fundamental</u><u> </u><u>quantities</u><u>.</u>

Explanation:

{ \sf{Pasacal \: ( Pa) =  \frac{newtons}{metres {}^{2} } }} \\  \\ { \sf{Pasacal  \: (Pa) =  \frac{kg \times  {ms}^{ - 2} }{ {m}^{2} } }}

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3 years ago
Two steamrollers begin 100 m apart and head toward each other, each at a constant speed of 1.00 m/s . At the same instant, a fly
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Answer:

The fly travels 2.4 m

Explanation:

Since the Two steamrollers begin 100 m apart and head toward each other, each at a constant speed of 1.00 m/s, we can find the time until they crash by the formula:

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Now, the fly will spend the same amount of time traveling as the steamrollers.

Since the fly moves at a speed of 2.4 m/s and we have a time of one hour the steamroller take to collide, then the fly will go a distance of;

Distance = speed x time = 2.4 × 1 = 2.4 m

4 0
3 years ago
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