A block of wood has a mass of 30 g and has the following side measurements; length = 5 cm, width = 4 cm, height = 3 cm. What is the density of the block of wood?

Peter's body supplies a force of 500 N to run up a 10-m hill in 10 s. How much power is involved in Peter's run up the hill?

Why does alternating current change direction 50 to 60 times per second? A) because it is produced by a generator that changes current direction as it spins B) because magnetic fields from the generator attract and repel the current C) because it

A normal walking speed is around 2.0 m/s. how much time t does it take the box to reach this speed if it has the acceleration 5.54 m/s2 that you calculated above?

Which tools would sara us to find an irregularly shaped objects mass and volume A. a meter stick, a ruler, and water B. a meter stick, a balance, and water C. a balance, water, and a ruler D. a balance, water, and a beaker

A cosmic ray electron moves at 6.5 x 106 m/s perpendicular to the Earth's magnetic field at an altitude where field strength is 1.24 10-5 T. What is the radius (in meters) of the circular path the electron follows? The charge of an electron is 1.

A large body of air hats has similar properties of a temperature and moisture is a

An ice rink is 200 feet long and 85 feet wide. The four corners of the rink are rounded to a radius of 24 feet. What is the surface area of the rink? Round the answer to the nearest square foot.

Which statement is correct about gasoline when it is burned? Heat energy is created by the gasoline. The total energy of the gasoline decreases. Chemical energy in the gasoline is destroyed. Chemical energy is transformed into heat energy.

The tilt of the Earth's axis of rotation changes over a period of 41,000 years. Which of these statements best predicts a long term effect of the changes in the tilt of the Earth's axis of rotation? a. The Earth's climate would change. b.

What do keratinized cells form?