A student pushes a box with a total mass of 50 kg. What is the net force on the box if it accelerates at 1.5m/s2? A. 51.5 N B. 48.5 N C. 75 N D. 33.3 N

A supersonic jet is 3,600 kilometers east of U. S. airspace and has been flying for 3 hours. If the jet flies at a constant velocity of 2,400 kilometers per hour to the west, how much time will it take the jet to reach U. S.

47. A car travels 85 km in the first half hour of a trip. The car continues to travel for 2 more hours and travels 200 km. What was the average speed of the car for the trip? a. 39 km/h b. 95 km/h c. 114 km/h d. 285 km/h

What is the ability to react with air

What would happen if we used up all the coal on Earth? A. We would make more in a coal factory. B. More coal would quickly form underneath the Earth's surface C. It would take millions of years to replace.

After 4 seconds, the car in Problem # 2 applies the brakes and comes to a full stop after 2 seconds. What is the acceleration of the car and what is the braking distance? #2 A car accelerates from rest at 4 m/s^2.

An open-topped freight car with mass 24,000 kg is coasting without friction along a level track. It is raining very hard, and the rain is falling vertically downward. Originally, the car is empty and moving with a speed of 4.00 m/s.

Photons travel outward from a light bulb in

The critical angle for a beam of light passing from water into air is 48.8°. this means that all light rays with an angle of incidence in the water that is greater than 48.8° will be

A basketball is filled with air and has a small hole. Explain why the basketball would leak.

Aligned magnetic domains are only present in which of the following? A) permanent magnets B) temporary magnets C) all magnetic material D) depends on the situation