Questions from College Physics

Q: The graph for this problem shows the vertical velocity component vy of

The graph for this problem shows the vertical velocity component vy of a bouncing ball as a function of time. The y-axis points up. Answer these questions based on the data in the graph. (a) At what t...

Q: The last step in the carbon cycle CNO-I that takes

The last step in the carbon cycle CNO-I that takes place inside stars is p + 15N → 12C + (?). (a) Show that the reaction product “(?)” must be an alpha particle. (b) How much energy is released by t...

Q: Six flywheels have masses, thicknesses, radii, and angular speeds

Six flywheels have masses, thicknesses, radii, and angular speeds as given in the table. Each flywheel is a solid disk. Rank the flywheels in order of their angular momentum, smallest to largest.

Q: Plot a graph of this data for a spring resting horizontally on

Plot a graph of this data for a spring resting horizontally on a table. Use your graph to find (a) the spring constant and (b) the relaxed length of the spring.

Q: A figure skater is spinning at a rate of 1.0

A figure skater is spinning at a rate of 1.0 rev/s with her arms outstretched. She then draws her arms in to her chest, reducing her rotational inertia to 67% of its original value. What is her new ra...

Q: Find the mass (in kg) of one molecule of CO2

Find the mass (in kg) of one molecule of CO2.

Q: A flat, circular metal disk of uniform thickness has a radius

A flat, circular metal disk of uniform thickness has a radius of 3.0 cm. A hole is drilled in the disk that is 1.5 cm in radius. The hole is tangent to one side of the disk. Where is the CM of the dis...

Q: A trap door, of length and width 1.65 m

A trap door, of length and width 1.65 m, is held open at an angle of 65.0° with respect to the floor. A rope is attached to the raised edge of the door and fastened to the wall behind the d...

Q: A skater is initially spinning at a rate of 10.0

A skater is initially spinning at a rate of 10.0 rad/s with a rotational inertia of 2.50 kg·m2 when her arms are extended. What is her angular velocity after she pulls her arms in and reduces her rota...

Q: Two identical gliders, each with elastic bumpers and mass 0.

Two identical gliders, each with elastic bumpers and mass 0.10 kg, are on a horizontal air track. Friction is negligible. Glider 2 is stationary. Glider 1 moves toward glider 2 from the left with a sp...