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The planet Neptune is 4.5 X10^12m from the earth. Its diameter is 4.9 x 10^7m. What diameter telescope objective would be necessary to just barely see Neptune as a disk rather than as a point of light? Assume a wavelength of 550.
A coil has 395 turns and self-inductance 3.25 mH. The current in the coil varies with time according to i = (680 mA) cos(?t/0.0250 s). What is the maximum emf induced in the coil
What must be the temperature of the cold reservoir in order to increase the efficiency to 29.0%
A model rocket is fired vertically from rest. It has a net acceleration of 15.0 m/s2. After 1.1 s, its fuel is exhausted and its only acceleration is that due to gravity. how high does the rocket travel
you are working as a summer intern for the illinois department of natural resources dnr and are assigned to some
A scuba diver and her gear displace a volume of61.0L and have a total mass of68.0kg. What is the buoyant force on the diver in sea water
A series RCL circuit includes a resistance of 298 ohm, an inductive reactance of 649 ohm, and a capacitive reactance of 415 ohm. The current in the circuit is 0.317 A. What is the voltage of the alternator?
A 50.0kg pole vaulter running at 10.0m/s vaults over the bar. Assume that the vaulter's horizontal component of velocity over the bar is 1.0 m/s and disregarding air resistance, how high was the jump.
Two metal disks, one with radius R_1 = 2.55 cm and mass M_1 = 0.850 kg and the other with radius R_2 = 4.90 cm and mass M_2 = 1.57 kg, What is the total moment of inertia of the two disks
Cars have shock absorbers to damp the oscillations that would otherwise occur when the springs that attach the wheels to the car's frame are compressed or stretched. What will the period of the underdamped oscillation of this car be if the pushing-..
The electric field inside a 50.0?cm? long copper wire is 5.00mV/m .What is the potential difference between the ends of the wire
A Ferris wheel is moving at an initial angular velocity of 1.0 rev/53 s. If the operator then brings it to a stop in 2.8 min, what is the angular acceleration of the Ferris wheel
What is the speed of the large cart after the impact.
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