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A satellite circles a spherical planet of unknown mass in a circular orbit of radius 1.9 x 10^7 m. The magnitude of the gravitational force exerted on the satellite by the planet is 140 N.
(A) What would be the magnitude of the gravitational force exerted on the satellite by the planet if the radius of the orbit were increased to 3.6 x 10^7 m?
(B) If the satellite circles the planet once every 2.1 h in the larger orbit, what is the mass of the planet?
Two metal plates are held together by two steel rivets, each of diameter 0.24cm and length 1.2cm.How much force has to be applied parallel to the plates to shear off both rivets.
A 70-? electrical appliance and a 110-? electrical appliance are plugged into the outlets of a house. By what factor will the power used change if an additional 140-? electrical device is plugged in?
An Australian emu is running due north in a straight line at a speed of 13.0 m/s and slows down to a speed of 9.60 m/s in 4.20 s. What is the magnitude and direction of the bird's acceleration
A 1.35 kg object is moving in the x direction at 16.4 m/s. Just 3.61 s later, it is moving at 28.8 m/s at 36.0^circ to the x axis. What is the magnitude of force applied throughout this time.
Measurements with microelectrodes have shown that a 0.30-nm-diameter potassium ion(K+) channel carries a current of 1.8 pA, How many potassium ions pass through if the ion channel opens for 1.0 ms
The potential in a region between x = 0 and x = 6.00 m has a linear relation, Calculate the potential at the following positions: x = 0, 3.00 m and 6.00 m and also find magnitude and direction
A bar is used to lift a 100 kg block of concrete. The pivot is 1.00 m from the block. Find the mechanical advantage
A 115-V source of emf is attached to a heating element with is a coil of nichrome wire (r=100*10^-8) of cross section 1.20 mm^2. What must be the length of the wire
As F is enhancement d, the block would either begin to slide, or begin to tip over. What must be the coefficient of static friction ms so that the block begins to slide rather than tip.
A person sees clearly wearing eyeglasses that have a power of -5.00 diopters, If the person wants to switch to contact lenses placed directly on the eyes, what lens power should be prescribed
A certain freely falling object requires 1.6s to travel the last 38.00m before it hits the ground. From what height above the ground did it fall.
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1330 Hz. The bird-watcher, however, hears a frequency of 1410 Hz. What is the speed of the bird, expressed as a percentage of the speed of sound?
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