A science student drops a rock a mine shaft. If it takes 3.0 seconds for the rock to hit the bottom of the shaft, what is the speed of the rock just before impact? (Acceleration of the falling object is 9.8 m/s^2

An open system is a system in which both matter and energy are exchanged with the surroundings. a. true b. false

The slowest animal ever discovered was a crab found in the Red Sea. It traveled with an average speed of 5.70km/yr. how long would it take this crab to travel 100km?

If force remains constant and acceleration decreases what must happen to the mass

Andrew is observing the changes of state when an ice cube is slowly heated from - 10C to 110C. a. The molecules escape the liquid state and become a gas. b. The ice cube becomes water vapor. c.

Reflected light from a thin film of oil gives constructive interference for light with a wavelength inside the film of λfilm. By how much would the film thickness need to be increased to give destructive interference? A. 2λfilm B. λfilm C. λfilm/2 D.

Will make Brainlest! <3 Metals are considered to be good conductors of heat. How do the specific heat values indicate this?

Which example identifies a change in motion that produces acceleration? choices are: 1. a speed skater moving at a constant speed on a straight track 2. a ball moving at a constant speed around a circular track 3.

Which of the following diagnostic procedures uses ultrasound?

Why is it easier to read black text on a white background than to read green text of any light color?

If object A has more mass than object B, does object A contain more matter? Explain.