Yes. When you let go of your phone it will fall to the earth because of Gravitational pull. If it did not exist the phone would float like in space
The correct answer is b changing tides
Answer:
35 Joules
Explanation:
Applying
Input Energy(Q) = Useful energy output(U)+Wasted Energy(W)
Q = U+W.............................. Equation 1
Make U the subject of the equation
U = Q-W................... Equation 2
From the question,
Given: Q = 120 Joules, W = 85 Joules
Substitute these values into equation 2
U = 120-85
U = 35 Joules
Best way is to study, pay attention in class. Something i have found very helpful is take notes. Writing things down is a very good way to remember content.