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A 6500-kg satellite is in a circular earth orbit that has a radius of 3.5 10^7 m. A net external force must act on the satellite to make it change to a circular orbit that has a radius of 8.9 10^6 m. What work must the net external force do?
a simple harmonic oscillator consists of a 100 g mass attached to a spring whose force constant is 104 dyne cm. the
what is the horizontal distance x between the two balloons.
During an acceleration, the angular speed of an engine increases from 850 rpm to 2750 rpm in 4.4 s. What is the average angular acceleration of the engine
A star of radius 9.1 × 10^5 km rotates about its axis with a period of 49 days. Estimate the period of the neutron star
q1.two infinite wires 14 cm apart. the left-hand wire carries a current of 3 a into the paper. the right-hand wire
A stone is dropped from the roof of a building; 1.90s after that, a second stone is thrown straight down with an initial speed of 25.0m/s , How long did it take the first stone to reach the ground
A large box with mass 45 kg is being pushed up a ramp at a 32 degree incline at a constant velocity by a man pushing parallel to the incline of 7.80 m. determine the force the man is pushing on the box
Scientists working in field of nanotechnology use either atop-down or bottom-up approach to construct tiny objects. Give andexampleof a visible structure that was made using the bottom-upapproach and one that was made using top-down approach.
An airplane traveling at half the speed of sound emits a sound of frequency 5.31 kHz. (a) At what frequency does a stationary listener hear the sound as the plane approaches? (b) At what frequency does a stationary listener hear the sound after the p..
An ideal (Carnot) freezer in a kitchen has a constant temperature of 263 K, whereas the air in the kitchen has a constant temperature of 303 K. Suppose the insulation for the freezer is not perfect and conducts energy into the freezer at a rate of 0...
Estimate the heat flow when a double pane of glass is used with a 4.0 mm air gap between the panes? Each individual glass sheet is 4.0 mm thick
a spherical surface completely surrounds a collection of charges. find the electric flux through the surface if the
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