Answer:
From the object at higher temperature to the object at lower temperature
Explanation:
Heat corresponds to the transfer of thermal energy between two objects. Temperature gives a measure of "how much thermal energy an object has": the higher the temperature, the faster the molecules inside the object, the more thermal energy the object has. Therefore, an object at higher temperature has more thermal energy than an object at lower temperature, so the transfer of heat goes from the object at higher temperature to the object at lower temperature.
Answer:
Mechanical Energy (initial) = Mechanical energy (final)
Ep(initial) + Ek(initial) = Ep(final) + Ek(final)
mgh(initial) + 1/2mv²(initial) = mgh(final) + 1/2mv²(final)
m being the mass of the penguin (kg)
g being gravitational acceleration (9.80 m/s²)
v(initial) being zero
h(final) being zero,i.e. final height is zero
v(final) being final velocity
solve for h(initial) being initial height at the top of the glacier
answer will be in metres
NB: don't forget to square the velocity
Explanation:
Since they mentioned frictionless, we know that this is a closed system therefore we are free to use this equation of conservation of mechanical energy
Don't forget to rate answer
In collision type of problems since momentum is always conserved
we can say
So here along with this equation we also required one more equation for the restitution coefficient
so above two equations are required to find the velocity after collision
here the change in velocity occurs due to the contact force while they contact in each other
so this is the impulse of collision while they are in contact with each other while in collision which changes the velocity of two colliding objects
Answer:
The force of friction is 622.58 N.
Explanation:
Given that,
Mass of the bottle, m = 0.27 kg
Finally it stops, v = 0
Distance traveled by the bottle, d = 1.7 mm = 0.0017 m
Let the initial speed of the bottle, u = 2.8 m/s
Let f is the force of friction is acting on the bottle. The force of friction is given by Newton's second law of motion as :
Using third equation of motion :
f = -622.58 N
So, the force of friction is 622.58 N.