A brick falls from 12 m scaffolding. What is the final velocity of the brick if it was initially at rest? How much time passes during the fall?

The activation energy of a certain reaction is 37.2 kJ/mol. At 20 ∘C, the rate constant is 0.0130 s-1. At what temperature would this reaction go twice as fast? Express your answer numerically in degrees Celsius

What property of a wave describes how often it occurs?

How many protons and neutrons does sulfur have

Joe lives 100 miles away from Bill. What is Joes average speed if he reaches Bills home in50's?

An acorn falls from a branch located 9.8 m above the ground. After 1 s of falling, the acorn's velocity will be 9.8 m/s downward. Why hasn't the acorn hit the ground?

Imagine you fill an insulated cup almost full with chopped or crushed ice, and measure the temperature after a minute or two, once it's all come to thermal equilibrium.

A 23kg block at rest on a flat surface experiences 200 N of friction. What is the coefficient of friction for the surface

Some ideas for 7th grade science fair projects

A mover pushes a 245 kg piano so that it accelerates uniformly from rest to 1.5 m/s in 5.00 s. What is the power delivered by the mover in this time interval? A 55W B 110W C 280W D 540 W

A ball is thrown vertically upward from the top of a 100 foot tower, with an initial velocity of 10 ft/sec. Its position function is s (t) = - 16t2 + 10t + 100. What is its velocity in ft/sec when t = 2 seconds?