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SIZIF [17.4K]
3 years ago
7

If two objects are in motion and have the same momentum, Object-A has a mass of 25 kg and a velocity of 2 m/s. What is the veloc

ity of Object-B if its mass is 10 kg
Physics
1 answer:
Alenkinab [10]3 years ago
6 0

Answer:

5m/s

Explanation:

Vb=Va\frac{ma}{mb} =2*\frac{25}{10} =5m/s

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7. How much thermal energy is absorbed when 10.0 g of ice at 0.0 degrees C changes phase to liquid water at 0.0 degrees C? The m
Nesterboy [21]

Answer:

3.34 kJ

Explanation:

FIrst of all, we need to calculate the number of moles corresponding to 10.0g of ice. This is given by

n=\frac{m }{M_m}

where

M_m = 18.02 g/mol is the molar mas

m = 10.0 g is the mass

Substituting

n=\frac{m}{M_m}=\frac{10 g}{18.02 g/mol}=0.555 mol

Now we know that the heat of fusion is

H_{fus}=6.01 kJ/mol

so the thermal energy needed to fuse the ice is

Q=n H_{fus} = (0.555 mol)(6.01 kJ/mol)=3.34 kJ

6 0
3 years ago
1. Describe the differences in the ways the sand castle is changed by an ocean wave and by Dylan stomping on it
Snezhnost [94]

A sand castle that was changed by the ocean waves would be slowly taken away from by the waves and would just become a smooth mound of sand. If Dylan stomped on it then it would still have all of the same sand as before but in a different shape. It would also become a mound of sand but it would have all the same sand as before.


(I don't know if I was supposed to talk about fancy physics stuff so I just gave a basic explanation. I don't know if my answer is really right or not... hope it helped though :))

6 0
3 years ago
A marble statute is exposed to the weather, within a few years
andrey2020 [161]

Answer:

it might be damaged

Explanation:

depending on how harsh the weather is it might be more or less damaged

6 0
3 years ago
Calculate the average speed in metres per second from Glasgow to Ediburgh ( The table )
Angelina_Jolie [31]
Total distance is 28+12+34=74km=74000m.
Total time is 20+8+25 minutes=53 minutes=53×60=3180 secs.
Average speed is 74000/3180=23.27 m/s.
7 0
3 years ago
Which statement accurately describes the ultraviolet catastrophe
castortr0y [4]

Answer: A hot lightbulb gave off white visible light instead of ultraviolet light.

Explanation:

3 0
4 years ago
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