An 80 kg man is standing in an elevator which is moving down and slowing down at a rate of 2.0 m/s2. how hard must the floor of the elevator push up on the man?

What are the four main groups of organic molecules in living things?

The surface of the moon always looks the same because the moon has no: gravity weather running water

Which of the following describes an object in static equilibrium? A. A platypus lies motionless on the sand. B. A tuna speeds up from 2 m/s to 3 m/s C. A dolphin jumps out of the water D. A zebra shark swims at a constant speed of 8 m/s

Density (D) is defined by mass/volume. Which item decreases as heat is applied? V D M

A student says that since the atomic theory is just a theory, it should not be considered useful. Which statement best argues against the student's opinion?

Which of the following is an example of applied research?

A Cadillac Escalade has a mass of 2,569.6 kg, if it accelerates at 4.65 m/s^2 what is the net force on the car?

If you are trying to balance a seesaw and you have a higher mass on the left, should the mass on the right be placed at a greater distance or lower distance to balance it? Why?

A car travels 300 km in the first 3 hours of a trip. Then it hits traffic and travels only 60 km during the last hour. What is the average speed of the car? a.) 180 km/h b.) 100 km/h c.) 90 km/h d.) 120 km/h

What is the purpose of using a wedge? A. separates objects B. keeps objects together C. allows you to exert force over a distance