A driver notices an upcoming speed limit change from 45 mi/h (20 m/s) to 25 mi/h (11 m/s). If she estimates

the speed limit will change in 50 m, what acceleration is needed to reach the new speed limit before it begins?

Which of the following statements correctly describes the law of conservation of energy? Group of answer choicesa. Mass cannot be created but it can be destroyed under extreme pressures. b.

What occurs when an unstable atomic nucleus changes into other nuclei by emitting particles and energy

Why do some kinds of ice on Earth change the sea level when they melt while others do not?

The buoyant force that is exerted by a fluid on an object that displaced a volume Vdisp is written as: Fbfo=ρfVdispg. A block of wood with a mass of 750.0 g is placed in a container of water.

Why internal energy is not sufficient to compare macro and micro states

While playing with her 5 year old cousin, a Physics 135 student pushed him forward on his scooter. She pushes with a force of 50 Newtons for 3.5 seconds. If the boy and the scooter together have a mass of 30 kg, what is their final velocity? a. 2.

3. A 120.0 V generator supplies 3.0 kw of power. How much current ca the generator deliver?

An apple drops from a tree and hits the ground in 1.5s what is its speed just before it hits the ground?

Sound travels slow in cold air. Why does the speed of sound depend on air temperature?

A tow truck pulls a 500 kg car so that the car accelerates 2 m/s2. What is the net force on the car? 250 N 498 N 1000 N 502 N