A boy is inning with a kinetic energy of 810j. If the boy has a mass of 80kg. What is his speed?

He density of ice is 0.92 g/cm3; and the density of seawater is 1.03 g/cm3. a large iceberg floats in arctic waters. what fraction of the volume of the iceberg is exposed?

Asteroids move much slower and less frequently than stars. a. True b. False

A trumpet player is tuning his instrument by playing an A note simultaneously with the first-chair trumpeter, who has perfect pitch. The first-chair player's note is exactly 440 Hz, and 2.70 beats per second are heard.

Select the correct answer. A mixer-grinder has an efficiency of 65 percent. If the output work is 50 joules, what is the amount of input work required?

Find the magnitude of the force needed to accelerate a 300 g mass with a⃗ = - 0.205 m/s2 i^+0.700 m/s2 j

When one object heats another, does the temperature increase of one object always equal the temperature decrease of the other object? Explain

Add the following displacement vectors: 12 m south and 15 m 55° E of N?

And electric current is produced by which of the following processes? A. Electrical resistance B. Transfer of protons C. Convection currents D. Electromagnetic induction

The basic building block of life is

What is the reason for Mary's resemblance to her mother. Mary's relatives and friends feel she had her mothers feature