Meg runs a 10-km race in 45 minutes (0.75 hours). what was her speed in kilometers per hour? a. 7.5 km/hr b. 4.5 km/hr c. 13 km/hr d. 22 km/hr

A car starts from rest and speeds up at a constant rate of 2.03 m/s^2 in a straight line until it reaches a speed of 21.1 m/s. The car then slows down at half the rate that it sped up until it stops.

Which best describes the materials that make up an electrical cord? 1. a metallic conductor lacking free electrons surrounded by a rubber insulator with free electrons 2.

What are the major steps of solar system formation in the correct order?

A 175 g ball on the end of a 0.5 m light string is revolving uniformly at 2 rev/s. what is the ball's acceleration and string's tension?

You use an inclined plane to move furniture into a truck. You perform 105 kJ of work, but only do 88 kJ of useful work. What is the efficiency of the inclined plane?

The current through two identical light bulbs connected in a series is 0.25 amps. The voltage across both bulbs is 100 volts. Find the resistance of a single light bulb.

The Sun transfers light energy that is transformed into what kind of energy in plants?

The siren of a fire engine that is driving northward at 30.0 m/s emits a sound of frequency 2000 Hz. A truck in front of this fire engine is moving northward at 20.0 m/s.

If an atom has 34 protons and 40 neutrons, what is the mass number?

The atomic mass of an atom (in amu) is equal to Question 11 options: A. the total number of its protons, neutrons, and electrons B. the total number of electrons C. the total number of protons D. the total number of its protons and neutrons E.