Answer:
speed is 25.43 85 x 10^5 m/s
Explanation:
momentum = 7.25 x 10^5 kg.m/s
mass = 0.285 kg
to find out
speed
solution
we have given mass and momentum so
to find speed we apply here momentum formula that is
momentum = mass × speed ...................1
put here all value and find speed
speed = momentum / mass
speed = 7.25 x 10^5 / 0.285
speed = 2543859.649
so speed is 25.43 85 x 10^5 m/s
<span>Well the Wheels would help to move the box but you need to have in mind that if the box is heavy you must make sure that it does not role-down because of how heavy the box is</span>
His average speed is 45 miles an hour
Answer:
First law: kinetic energy is used to turn an electric generator
Second law: some thermal energy is lost to the environment as it travels through the system
Explanation:
The first law of thermodynamics is known as the law of conservation of energy. It states that energy can neither be created nor destroyed but can only be transferred or changed from one form to another. When thermal energy is used to generate electricity, the kinetic energy of the steam is used to turn the electric generator (thereby producing electrical energy).
The second law of thermodynamics states that energy transfer or transformation leads to an increase in entropy resulting in the loss of energy. This law also states that as energy is transferred or transformed, some is lost in a form that is unusable. When thermal energy is used to generate electricity, some of the thermal energy is lost to the environment as it travels through the system.
2km*1000=2000m
S=ut+1/2at^2
a=0,thus s=ut
2000=90t
t=2000/90
=22.22s(to 4 s.f)
Please mark as brainliest
