The pressure of a box pushes down on the floor is 50 Pa if the box weighs 400 N what is the area of the base of the box

Element Z has a half-life of 20 minutes. In an events chain concept map tracing the nuclear decay of a 200g sample of element Z, would any of element Z remain after 160 minutes? If so, how much?

According to newton's second law of motion, an object will accelerate if you apply what kind of force? a. Inertial force b. Frictional force c. balanced force d. unbalanced force

The airbag inflates and deflates quickly so

The following is a graph showing the displacements and times for the winner of a horse race. What was the average speed of the horse that won the race? A. 0.05 m/s B. 20 m/s C. 45 m/s D. 285 m/s

Explain, in terms of particles, how heat is transferred through the glass wall of a boiling tube

What does the ozone layer absorb? a. Microwaves c. UV radiation b. X-rays d. Infra-red radiation

An object is undergoing shm with period 0.900 s and amplitude 0.320 m. at t = 0 the object is at x = 0.320 m and is instantaneously at rest. calculate the time it takes the object to go (a) from x = 0.320 m to x = 0.160 m and (b) from x = 0.

Your friend states in a report that the average time required to circle a 1.0-mi track was 49.325 s. This was measured by timing 10 laps using a stopwatch with a precision of 0.01 s. Do you believe his results are reliable? Explain.

The forklift exerts a 300.0 N force on the box and moves it 15.0 m into the air. How much work does the forklift do? A. 500 J B. 1.50 * 10^3 J C. 4.50 * 10^3 J D. 0.00 J

Why the room gets hot even we open the door of refrigerator?