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34kurt
2 years ago
9

If a person pulls back a rubber band on a slingshot without letting to go of it, what type of energy will the rubber band have?

A. Potential energy B. Rotational energy C. Kinetic energy D. Translational energy
Physics
1 answer:
Travka [436]2 years ago
7 0

Answer:

Potential energy. Releasing it, the potential energy would convert into motion, kinetic energy.

Potential energy is when an object has some sort of potential eg. for motion such as in this example.

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A car engine burns gas at 495 K, and exhausts to the air at 293 K. If it ran at the highest possible efficiency, how much input
slamgirl [31]

  The heat taken to do the 10,000 J of work is 4081 J

<u>Explanation:</u>

The ratio of the temperature difference between the reservoirs and the temperature of the hot reservoir is termed as maximum thermal efficiency.

Maximum thermal efficiency is

                                                   1 - (Tc / Th).

where Tc represents the  absolute temperature of the cold reservoir

           Th represents the absolute temperature of the hot reservoir.

                                                    1 - (293/495) = 0.408  

If the input is 10,000 J, then 4081 J is used to do work.  The remaining 5919 J is rejected as heat into the air.

4 0
3 years ago
Calculate the man’s mass. (Use PE = m × g × h, where g = 9.8 N/kg.)
vodomira [7]

Answer:

mass=56.12kg

Explanation:

PE=mgh

4620=m×9.8×8.4

make m subject of the formula...

m =4620/(9.8×8.4)

m=4620/82.32

m=56.12kg

7 0
3 years ago
If an object is placed 10cm in front of a converging lens that has a focal length of 15cm. What are the properties of the image?
Contact [7]

Answer:

Enlarged [Size]

Virtual and Erect [Nature]

On the same side of the lens as the object [Position]

Explanation:

7 0
3 years ago
The picture on the left represents the reactants in the equation and the picture on the right represents the products. Does this
V125BC [204]
The answer is , n<span>o, because there are not the same number of molecules in the product side as in the reactant side. 

The law of conservation of matter says that the system remains the same throughout. The number of atoms, mass and energy must stay constant. If you look at your figure there are more white atoms on the left side than the right, this means that there was a loss and this should not be the case. 
</span>
7 0
3 years ago
Which kinds of objects emit visible light in the electromagnetic spectrum?1)all objects2)radioactive objects3)relatively cold ob
Lostsunrise [7]
Relatively hot objects emit visible light.
Some examples: 
==> the wire coils in the toaster; 
==> the spoon that you stuck in the flame on the stove;
==> the fine wire in the lightbulb when current goes through it.

VERY radioactive objects also do that.  But if you're actually
standing there watching an object that's THAT radioactive,
then you're in big trouble.
8 0
3 years ago
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