What is the mass of a 3920 Newtons desk

Workers load a 500kg safe onto an elevator that lifts it 90m to the twentieth floor of a building. How much work did the elevator do on the safe?

6. A ray of light is incident at an angle of 35° on the surface of refractive index 1.35. Calculate the angle of refraction

A ray in oil (n = 1.52) reaches a boundary with water (n = 1.33) at 55.9 deg. Does it reflect internally or refract into the air?

The temperature 23°F is equivalent to °C.

Chemical composition describes

Compare all the organisms. What trend do you see?

A man weighs 1190 n on earth. what would he weigh on jupiter, where the free-fall acceleration is 25.9 m/s 2? the acceleration of gravity is 9.8 m/s 2. answer in units of n.

What is always true of a single-displacement reaction?

Mrs Garcia traveled 15 km in 1 hour. What was her average velocity in km/s?

Contrast the nucleus and electron in a cloud