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In the Bohr model, the electron is imagined to move in a circular orbit about a stationary proton. If the speed of the electron were7.9 multiplied by 105 m/s, what would be the corresponding orbital radius?
A rectangular block of copper has sides of length 5 cm, 21 cm, and 38 cm. what are the currents that the block can carry
Seismographs measure the arrival times of earthquakes with a precision of 0.100 s.7 To get the distance between to the epicenter of the quake, they compare the arrival times of S- and P-waves, which travel at different speeds.
if a 0.5kg cart and a 2.0 kg cart is attached and are rolling forward with a speed of 2.0 m/s. what are the speed and direction of the larger cart
Calculate the average density of a red giant star in grams per cubic centimeter. Take the star's mass to be 2*10^33 gm and its radius to be 3*10^12 cm
A carbon sample of the same size taken from a fresh piece of bone emits 16 beta emissions a minute. How long ago did the saber-tooth tiger live?
A 6V battery is connected in series with a 1.5V flashlight. what possible terminal voltages are available
A man stands on a scale in an elevator that is accelerating upward. The scale reads 839.7 N. What is the man's mass
A solid, uniform sphere of mass 2.0 kg and radius 1.7 m rolls without slipping down an inclined plane of height 6.7 m. What is the angular velocity of the sphere
A sound wave traveling at 343 m/s is emitted by the foghorn of a tugboat. An echo is heard 1.70 s later. How far away is the reflecting object
A 60.0-kg runner expends 335 W of power while running a marathon. determine the volume of bodily fluid (assume it is water) lost per hour
A square wire loop with 1.5 m sides is perpendicular to a uniform magnetic field, with half the area of the loop in the field. The loop contains an ideal battery with emf = 19 V. find the direction of the net emf in the circuit
A uniform, cylindrical pulley of mass M=12.2 kg and radius R=0.272 m rotates freely about a fixed horizontal axis. What is the mass of the block
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