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Q1. Assuming she was dropped from a height of 290 and that Superman can accelerate straight upward at 18.0, determine how far Lois falls before he catches her.
Q2. A 120 g trick baseball is thrown at 51 km/h. It explodes in flight into two pieces, with a 50 g piece regular straight ahead at 86 km/h. How much energy do the pieces gain in the explosion?
A doubly charged ion is accelerated to an energy of 31.5 keV by the electric field, What is the electric field strength between the plates in V/m
a negative charge of -0.550uC exerts an upward 0.205n force on an unknown charge 0.305m directly below it. what is the direction of the force that the unknown charge exerts on the -0.550uC charge
compute how much charge must be placed on the surface of a sphere of radius 0.31 m for the electric potential just above the surface to be 100 V. Assume that the charge is uniformly distributed.
A rabbit runs in the straight line with a velocity of +1.6 m/s for a period of time, rests for 12 s, and then runs again along the equivalent line at +0.52 m/s for an unidentified amount of time. The rabbit travels the total distance of 1224 m, and i..
If we make the approximation that the Earth's atmosphere is isothermal, with T=290K, what is the mass of the Earth's atmosphere. What is the ratio of the mass of Earth's atmosphere to the total mass of the Earth
A bat at rest sends out ultrasonic sound waves at 46.9kHz, What is the received sound frequency
e drives 100 mi to Grandmother's house. On the way to Grandmother's, Julie drives half thedistance at 41.0mph, What is her average speed on the return trip
An athlete swings a ball, connected to the end of a chain, in a horizontal circle. The athlete is able to rotate the ball at the rate of 7.69 rev/s, Which rate of rotation gives the greater speed for the ball
Determine the rate at which the electric field changes between the round plates of a capacitor, 5.6 cm in diameter
With a particular grating a doublet of the two wavelengths 731.3 and 732.1 nm is viewed in the third order at 9.3° to the normal, find the grating spacing in nanometers
An inductor of 493 mh with a resistance o44 ohms is connected to a power supply with a maximum voltage of 264V and a frequency of 53 Hz. Find the power loss in the inductor
A zone plate is to be set up on an optical bench , where it will be used an an enlarging lens. find the focal length of the zone plate
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