A spring has an unstretched length of 10 cm. it exerts a restoring force f when stretched to a length of 11 cm. part a for what length of the spring is its restoring force 3f?

Arthur and Betty start walking toward each other when they are 100 m apart. Arthur has a speed of 3.0 m/s and Betty has a speed of 2.0 m/s. Their dog, Spot, starts by Arthur's side at the same time and runs back and forth between them at 5.0 m/s.

If the car went 30 km west in 25 min. and then 40 km east in 35 min., what would be its total displacement?

What is the relationship between the intensity of an earthquake at a given location and the distance from the epicenter? Intensity remains constant with increasing distance. Intensity increases as distance decreases.

How do you think cotton, tobbaco, and other crops were shipped to their destination

Technician A says that during an exterior inspection of a vehicle, you should open and close doors to check that they are operating correctly. Technician B says you should never pull on bumpers or fenders. Who is correct?

With the switch closed, how does the voltage across the 20-ω resistor compare to the voltage across the 10-ω resistor?

A 5.90-g lead bullet traveling at 410 m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half is transmitted to the tree, what is the increase in

How do you scientists determine the number of neutrons in an isotope of an atom?

Why is energy efficiency important to society's need to be efficient with energy usage?

A wave has a wavelength of 9 mm and a frequency of 14 hertz. What is its speed?