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Approximately one billion years ago, the Moon orbited the Earth much closer than it does today. The radius of the orbit was only 24 400 km. Today, the radius is 385 000 km. The orbital period was only 23 400 s. The present period is 2.36 x 106 s. Assume that the orbit of the Moon is circular. Calculate the ratio of the speed of the Moon in its ancient orbit to the speed that it has today.
the reserve capacity rc of a car battery is defined as the number of minutes the battery can provide 25.0a of current
How much charge is stored on the 6 μF capacitor, What is the potential difference across the 10 μF capacitor? Which capacitor stores the most energy in the circuit?
A satellite is placed in a circular orbit about Earth with aradius equal to 51% the radius of the Moon's orbit. What is its period of revolution in lunar months
The second minimum in the diffraction pattern of a 0.12 mm -wide slit occurs at 0.68 degrees. What is the wavelength of the light?
a mosquito collides head-on with a car traveling at 60 mph. is the force of the mosquito on the car larger than smaller
The far point of a nearsighted person is 8.4 m from her eyes, and she wears contacts that enable her to see distant objects clearly. How high is the image formed by the contacts
a football quarterback throws a pass at an angle of 38.6deg. he releases the pass 3.50 m behind the line of scrimmage.
A solid conducting sphere of radius R1 = 1.601 m has a charge of Q = 4.477 C distributed evenly on its surface. A second solid conducting sphere of radius R2 = 0.7843 m is initially uncharged. The second sphere is located a distance of 10.00 m from t..
A 23 g ball is fired horizontally with initial speed toward a 110 g ball that is hanging motionless from a 1.1m long string. The balls undergo a head on, perfectly elastic collision, after which the 110 g ball swings out to a maximum angle theta m..
A 535 kg automobile slides across an icy street at a speed of 54.5 km/h, What is the speed of the two cars just after they collide
In experiment PH04a, for the resistors in parallel circuit configuration, if we added to the circuit two additional parallel legs with each leg having a single 50 Ohm resistor
A 2.0 uF capacitor is first charged by being connected across a 6.0 V battery. Find the charge on each of the capacitors
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