A measure of the force necessary to stretch or break the surface of a liquid

What is the average speed of a cheetah that runs 70 m in 2.5 seconds?

What determines whether or not work is being done?

Find the wavelength of the balmer series spectral line corresponding to n = 15.

Silver and Copper rods of equal areas are placed end to end with the free end of the silver rod in ice at 0.00 degrees Celsius and the free end of the copper rod in steam at 100. degrees Celsius. The Silver rod is 15.

A 50-g ball rolls across the table at 2 m/s. A 100-g ball rolls across the same table at 1 m/s. Which ball has more momentum?

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?

Why does lightning follow a jagged path

Helene a hiker starts at an elevation of 27 ft above sea level and descends 32ft during her hike to Basecamp which describes the elevation of base camp