How do you calculate percentage uncertainties?

The fastest pitched baseball was clocked at 47 m/s. Assume that the pitcher exerted his force (assumed to be horizontal and constant) over a distance of 1.0 m, and a baseball has a mass of 145 g.

A country is deciding what to do about pollution given off by power plants. Which of the following is an example of how science can be used to make this decision? A. Scientists know what kind of power plants people want. B.

What is the magnitude of the angular momentum relative to the origin of the 100 g particle in the figure (figure 1? express your answer to two significant figures and include the appropriate units?

if a parachute and a stone is dropped from a certain height at once on the Moon which will reach the surface of moon

To clean the outside of your house you rent a small high-pressure water sprayer. The sprayer's pump delivers slow-moving water at a pressure of 9000000.0 Pa (about 90.0 atmospheres).

Imagine two starts are exactly the same size, but one of the stars to greater mass than the other. which star will burn out all of its fuel first

How many eclipses normally occur each year? a. 2 b. 5 c. 7 d. 4

At what distance from equilibrium is the energy of a sho half kinetic and half potential?

Why can you not measure the volume of water in the measuring cylinder accurately unless you look straight at the scale?

How can biologic weathering result in chemical weathering? A. Bacteria release acids and other agents that break down rock B. Large herds temple rocks and break up soil C. Root loosen soil and break rock