a car moves from a to b at a speed of 50km per hr and comes back from b to a at a speed of 30km per hour. find its average speed during the journey

Use complete sentences to describe an extra-solar (exo) planet

As in the video, we apply a charge + to the half-shell that carries the electroscope. This time, we also apply a charge - to the other half-shell.

Which of the following statements about positive feedback mechanisms is not true

An object has a mass of 120 kg on the moon. What is the force of gravity acting on the object on the moon?

A ford is traveling with a speed of 15m/s and is 200 meters ahead of a Chevy that is traveling in the same direction but at a speed of 20m/s. How far will the chevy travel before catching up to the Ford?

Based on the assumption that a liquid conducting core and rapid rotation are both required for a magnetic field to operate, which terrestrial planets would you expect to have magnetic fields?

At a temperature of 320K, the gas in a cylinder has a volume of 40.0 liters. If the volume of the gas is decreased to 20.0 liters, what must the temperature be for the gas pressure to remain constant? A. 160 K B. 273 K C. 560 K D. 140 K

It takes a car five seconds to speed up from 20 m/s to 23 m/s. what is the acceleration of the car?

Which of the following is the largest disadvantage of hydropower

Two students standing apart in a classroom have a gravitational force of attraction between them of 3.20 x 10-8 N. If one student has a mass of 50.0 kg and the other has a mass of 60.0 kg, what is the distance between the students?