Which statements best describe magnetic fields? Check all that apply.

A person wants to fire a water balloon cannon such that it hits a target 100m100m away. if the cannon can only be launched at 45â45â above the horizontal, what should be the initial speed at which it is launched?

The big bang produced an imprint of leftover heat called

A power drill uses 13.73 amps of current and has a power rating of 1140 watts. What voltage does the drill require 7 amps 4.5 amps 7 ohms 4.5 ohms

Which best describes why a physical change differs from a chemical change? A. A physical change predicts the behavior of a substance when in a reaction, whereas a chemical change is used to identify characteristics of a substance. B.

In a series circuit, each circuit element has the same:a. currentc. capacitanceb. voltaged. resistance

In an experiment, 108 J of work was done on a closed system. During this phase of the experiment, 79 J of heat energy was added to the system. What was the total change in the internal energy of the system?

J. J. Thomsons experiments provided evidence that an atom

How does our sun differ from most other main sequence stars?

A large body of air hats has similar properties of a temperature and moisture is a

An ice rink is 200 feet long and 85 feet wide. The four corners of the rink are rounded to a radius of 24 feet. What is the surface area of the rink? Round the answer to the nearest square foot.