Geosynchronous satellites orbit the Earth at a distance of 42 000 km from the Earth's center. Their angular speed at this height is the same as the rotation rate of the Earth, so they appear stationary at certain locations in the sky. What is the force acting on a 1 500-kg satellite at this height?
a. 85.0 N
b. 333 N
c. 404 N
d. 457 N
b
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A 1.0-?F and a 2.0-?F capacitor are connected in series across a 3.0-V battery. (a) What is the voltage across the 1.0-?F capacitor? (b) What is the voltage across the 2.0-?F capacitor?
What will be an ideal response?
A _____________ has a radius of about 10 km and is supported by the pressure associated with degenerate neutrons
a. black hole b. neutron star c. white dwarf d. supernova remnant e. red dwarf
A rocket moving in outer space maintains a constant acceleration (magnitude = 20 m/s2) while ejecting fuel at a speed of 15 km/s relative to the rocket. If the initial mass of the rocket is 3 000 kg, what is the magnitude of the thrust after 800 kg of fuel have been consumed?
A. 56 kN B. 48 kN C. 52 kN D. 44 kN E. 36 kN
An object 50-cm high is placed 1.0 m in front of a converging lens whose focal length is 1.5 m. Determine the image height (in cm)
a. 77 b. 150 c. 52 d. 17 e. 83