A student is testing her reaction time by trying to keep a light bulb on for exactly 4 seconds by matching a stopwatch. When she turns the light bulb off, the stopwatch reads 4.13 seconds. What is her reaction time?

Suppose the mass is pulled down to where the spring's length is 72 cm. When it is released, it begins to oscillate. What is the amplitude of the oscillation?

A rifle bullet travels 5000 feet in 4 seconds. What is the speed of the bullet?

What is the hardness of copper ore?

Which phenomenon occurs when the moon and Earth are aligned with the sun? A. Retrograde motion B. Solstice C. Equinox D. Eclipse Eclipse occurs when the moon and Earth are aligned with the sun.

What is the direction of the force when an object moved in a circle

A crane lifts a 400 N crate full of baked beans 15 m. How much work was done by the crane?

High altitude high velocity rivers of air are called

A string of 18 identical Christmas tree lights are connected in series to a 130 V source. The string dissipates 61 W. What is the equivalent resistance of the light string? Answer in units of Ω.

For each of the following (a through d), indicate which is a variable and which is a constant:a. The number of minutes in an hour. b. Systolic blood pressure. c. Freezing temperature of water in degrees Kelvin. d. Ratings of daily anxiety.

Which of the following is NOT an example of kinetic energy being converted to potential energy A) A basketball player jumping for a rebound B) Releasing a compressed spring C) Sqeezing a rubber ball D) Pulling a sled uphill