## Physics Resources

A GPS satellite orbits at an altitude of 2.06×104 km above the surface of Earth. (Recall that RE = 6.37 × 106 m.) What is the speed of the satellite?

1. How fast must an electron move if it is to have a de Broglie wavelength of 3.9 ✕ 10-11 m?   2.What is the speed of a proton with a de Broglie wavelength of 3.20 ✕ 10-14 m?

A steel cable whose effective cross section is 1.20 cm2 supports a 200-kg elevator. When the elevator is at rest at the second floor the length of the supporting cable is 40.000 meters. What...

a water reservoir tankof capacity 250m3 is situatedat a height of 20 m from water level. What will be the power of an electric motor to be used to fill the tank in 3 hrs

bolt of lightning, such as the one shown on the left side of the figure below, behaves like a vertical wire conducting current. As a result, it produces a magnetic field whose strength varies with...

One sphere with a radius of 1cm and another sphere with a radius of 2 cm are distanced with 1m appart, and are tied with the source of the electromotive force ε=3000 V. With what force these spheres...

a piano tuner exerted 1500 N in stretching a 0.5 m long steel piano wire with a cross-sectional area of 0.15 cm^2. by how much does this force lengthen the wire?

if the distance between the photogates in the diagram is 30 cm, and the times for the photogates are listed as:   blocked 0.000000 unblocked 0.00156 blocked 0.1   calculate...

A stroboscope is set to flash every 8.00 X 10-5 s. What is the frequency of the flashes?     Find the frequency of a tuning fork that takes 2.50 X 10-3s to complete one...

A meteor with a mass of 58000 kg falls from an radius of 7.1x10^6 m above the surface of the earth.    a) What is the speed of the meteor just before impact with the surface of the...

A 0.40-kg ice cube at −10.2° C is placed in the lemonade. What is the final temperature of the system, and the amount of ice (if any) remaining? Ignore any heat exchange with the bowl or the...