What is true about scientific "law"?

all experiments appear to "prove" the theory

all predicted observations are verified

the law is repeatable

no exceptions to the law are known

all of the above

Why is it sensible on diagrams to represent a force by an arrow?

Which best describes tropical continental climate during the summer? A. clear, dry weather, B. cloudy, wet weather, C. cold, dry weather, D. hot, dry weather

Which of the following elements is classified as a metal? A Bromine B Helium C Sulfur D Lithium

How much potential energy is in a 30.0 kg box of cooking pots held 10.0 m high?

If a 2.00kg ball is thrown straight upward and its maximum height is 25.51. what is the value of KE?

What kind of star gives rise to a type i supernova? a. white dwarf stars b. massive main sequence stars c. red giant stars?

Example of an object in motion

A proton and an alpha particle are momentarily at rest at a distance r from each other. They then begin to move apart. Find the speed of the proton by the time the distance between the proton and the alpha particle doubles.

Why is it a good idea to extend your bare hand forward when you are getting ready to catch a fast-moving baseball? a. So you can catch the ball with a stiff arm, increasing the time to slow the ball thus deceasing the force. b.

At room temperature what is the strength of the electric field in a 12-gauge copper wire (diameter 2.05 mm that is needed to cause a 2.75 a current to flow?