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Vesna [10]
3 years ago
7

Do objects of different size but same mass have same technical velocity? why?

Physics
1 answer:
denis-greek [22]3 years ago
7 0
1. It depends on the condition you are referring to
I mean if you drop a sphere and a thin copper plate both of same mass from the Mt Everest. both will have different velocity and time period to fall on the ground because both of them experiences a drag force upwards due to their shape the more the area you have the more the drag Force if thus the lesser the speed and more the time period is
2. if you assume it to be total vaccum then both of them will fall on the same time and with same velocity no matter the mass is different or the shape is ! physics work same for them ..
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kari74 [83]

Answer:

a) 3.242

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c) 3.59 cents

Explanation:

a) First all the temperature units should be in Kelvin. -30°C + 273.15 = 243.15K and 45°C + 273.15 = 318.15K. Coefficient of performance for refrigerator is COP = TL/(TH-TL) where TL is Lower Temperature and TH is the Higher Temperature. COP = 243.15/(318.15-243.15) = 3.242

b) COP  = Cooling Effect/Work Input. Cooling Effect (or Desired Output) is 4186 kJ.

So Work Input = Cooling Effect/COP = 4186KJ/3.242= 1291.178 KJ

c) 3.6 MJ (3600kJ) is for 10 cents, using ratio for cost: energy used

\frac{10}{3600 kJ} =\frac{x}{1291.178kJ}

3.59 cents

4 0
4 years ago
Martin has hypothesized that the size and types of trees differ between valleys and higher elevations. He sets up a transect lin
pogonyaev

Answer: The dependent Variables include: Size and Types of trees.

The independent Variables include:

geographic elevations that is, valleys and the higher elevations.

Explanation:

The dependent variable simply refers to the variable a researcher tests or measures during an experiment. On the other hand, the independent variable simply refers to the variable that's controlled during an experiment.

Based on the definition above, the dependent variables include the size and the types of trees while the independent variables include the

geographic elevations that is, the valleys and the higher elevations.

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anastassius [24]
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