An object with a mass of 1.5 kg changes its velocity from 15 m/s to 22 m/s during a time interval of 3.5 seconds. what impulse was delivered to the object?

For an object that is speeding up at a constant rate in the positive direction, what does the velocity vs. time graph look like? A. A horizontal line, not on the x-axis. B. A line angled upward C. A graph curving upward D.

A researcher is examining a sample of smooth muscle tissue under a microscope which of the following would correctly describe what he sees

You slide a coin across the floor, and observe that it slows down and eventually stops. A sensitive thermometer shows that its temperature increased. What can we conclude? (Select all that apply.)

What is the force that holds protons together in the nucleus? (They should repel each other since they are positively charged)

Which of the following is not considered to be a rock A (coal) B (sandstone) C (pumice) D (lava)

What is the source of energy for the process of evaporation?

How could you compare the energy carried in two different longitudinal waves

The instantaneous velocity of an object is the blank of the object with a blank

Which of the following best describes the earth's average surface temperature for the past 900,000 years? A. a steady warming trend B. fairly steady temperatures until recently C. prolonged periods of cooling and warming D.

What should you always include in a great summary? (Select all that apply) A. investigation plan B. possible errors C. predictions D. new questions