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How much work is done pushing an 80 N box 2 m across ue surtout

What work is done?

a. 40 J

c. 160 J

b. 20 J

d. 240 J

Make the following conversions 100 cm to meters

Which of the following is an example of a reversible process? A hand pump is rapidly compressed and the pressure and temperature in the pump rise. The pump is held in position as the temperature drops to the ambient temperature.

How was the evidence of the big bang called?

The velocity a rocket must reach to establish an orbit around Earth is called escape velocity.

Explain the difference between speed and velocity

A force of 5N compresses a spring by 4cm. Find the force constant of the spring.

Which of the following equations are balanced correctly? A: Cu + H2O → CuO + H2 B: Zn + HCl → ZnCl2 + H2 C: 2C4H10 + 13O2 → 8CO2 + 10H2O D: 2Ag2O → 4Ag + O2

Two identical objects are moving directly toward one another at the same speed v. ~v - ~v m m What is the total kinetic energy of the system of the two objects?

Why would a long series of gradual ramps be better than one short, steep ramp for moving heavy blocks of stone?

Why are some liquids more viscous than others?