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Reika [66]
3 years ago
8

20

Physics
1 answer:
Pani-rosa [81]3 years ago
4 0
The total displacement is 4.0 m east.
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a 2.80 kg mass is dropped from a height of 4.50 m. find its potential energy(PE) when it is 3.00 m above the ground.PLEASE HELP
Dennis_Churaev [7]

Answer:

82.3 J

Explanation:

PE = mgh

PE = (2.80 kg) (9.8 m/s²) (3.00 m)

PE = 82.3 J

5 0
4 years ago
Substance X transfers thermal energy to substance Y through conduction. What is an accurate conclusion about the condition of bo
bagirrra123 [75]
In order for the heat to be transferred from the body X to the body Y via conduction, there must be a difference in temperature of body X with respect to body Y. Body X must have a higher temperature than body Y. This process continues until both bodies arrive at thermal equilibrium, meaning they both have the same temperature. 
7 0
3 years ago
Read 2 more answers
А geostationary satellite moves in an orbit of radius 6300km. Calculate the speed with which it moves in the orbit [π=22÷7]​
azamat

Answer:

15.3 m/s

Explanation:

Radius of orbit= 6400+6300 = 12700 km

Circumference of orbit= 2*(22/7)*12700 =79796.45*10^3 m

Now,

       Speed= Distance / Time

                  = 79796.45*10^3/(24*60*3600)

                  = 15.3 m/s

4 0
3 years ago
True or false according to newtons 1st law an unbalanced force can change the motion of an object
lisov135 [29]
I think this is true
6 0
3 years ago
Assuming no friction, how does the initial gravitational potential energy of
babymother [125]

Answer:

a) They are the same.

Explanation:

Assuming no friction, there should be no energy transfer and thus the Law of Conservation of Energy says:

PE=KE,\\mgh=\frac{1}{2}mv^2

These types of problems also disregard any air resistance the surface of the object may cause. Therefore, no energy is transferred and from the Law of Conservation of Energy, 100\% of energy is preserved.

5 0
3 years ago
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