A physical science test book has a mass of 4.2 kg a. What is the weight on the Earth?

b. What is the weight on Mars (g = 3.7 m/s2 )

c. If the textbook weighs 20.5 newtons on Venus, What is the strength of gravity on Venus?

Describe the path of the electric current through a circuit?

Which of the following is a measure of the amount of light a star directly emits?               a.  luminosity    b.  intensity    c.  wavelength    d.  brightness

The drag force, fd, imposed by the surrounding air on a vehicle moving with velocity v is given by fd = cdaρv 2/2 where cd is a constant called the drag coefficient, a is the projected frontal area of the vehicle, and ρ is the air density. an automobile is moving at v = 80 kilometers per hour with cd = 0.28, a = 2.3 m2, and ρ = 1.2 kg/m3.