As seagull drops a shell from rest at a height of 12 m, so we use kinematic equation of motion,
Here, h is the height, u is initial velocity , v is final velocity and g is acceleration due to gravity.
Given, h = 12 m.
We take, 
and 
because seagull drops a shell from rest.
Therefore, the speed of shell when it hits the rocks,
Answer:
159 N
Explanation:
The force of friction, Fr is a product of coefficient of feiction and the normal force. Therefore, Fr=uN where N is the normal force and u is coefficient of friction. Here, we have two coefficients of friction but since it is sliding, then we use coefficient of kinetic energy. Substituting 0.25 for u and 636 N for N then
Fr=0.25*636=159 N
Therefore, the force of friction is equivalent to 159 N
It obeys law because the physics of quantum space are so slow and small it’s actually really fast
The answer is <u>"d. increased temperature".</u>
At the point when corals are stressed by changes in conditions, for example, temperature, light, or supplements, they remove the symbiotic algae living in their tissues, making them turn totally white. Hotter water temperatures can result in coral bleaching. At the point when water is too warm, corals will oust the algae living in their tissues, making the coral turn totally white. This is known as coral bleaching.
When a coral blanches, it isn't dead. Corals can endure a bleaching occasion, yet they are under more pressure and are liable to mortality.
Answer:
37.5m/s
Explanation:
momentum = mass x velocity
momentum / mass = velocity = speed
75kg*m/s / 2kg = 37.5m/s
