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A dolphin jumps with an initial velocity of 11.0m/s at an angle of 44.0 degrees above the horizontal. The dolphin passes through the center of a hoop before returning to the water. If the dolphin is moving horizontally when it goes through the hoop, how high above the water is the center of the hoop?
Green light (? = 546 nm) strikes a single slit at normal incidence. What width slit will produce a central maximum that is 1.70 cm wide on a screen 1.18 m from the slit
The total kinetic energy in one mole of an ideal gas is 4,000 J. If the gas is nitrogen, what is the root mean square velocity of an individual particle in the ideal gas
At one instant a bicyclist is 75m due east of a park's flagpole, going due south with a speed of 13.0 m/s. Then, 10s later, the cyclist is 65 m due north of flagpole, going due east with a speed of 20.0 m/s.
Two resistors (connected in series with each other) and a 18 Vbattery are connected in a loop. The voltage drop across the firstresistor is 7 V. What is the voltage drop across the secondresistor?
A plane electromagnetic wave propagates in a vacuum in the z-direction. What is the mathematical expression for the magnetic field
A ray of light traveling through air encounters a 1.7cm -thick sheet of glass at a 42? angle of incidence. Assume n = 1.5. How far does the light ray travel inside the glass
Consider two transformers. Transformer A has 300 turns on its primary and 500 turns on its secondary. What is the amplitude of the secondary voltage on transformer B
a pirate ship is locaed 560 m from a fort that is defening habour entrnce of an island a defense cannon at sea level fires cannon balls at 82 m/s. at what angle from the horizontal does the cannons hit
If the floor at the base of a table is very hard, and a tennis ball dropped from the top of the table 1 meter high rebounds with 85% of its velocity
A ball rolls across a floor with an acceleration of 0.100 m/s2 in a direction opposite to its velocity. What was the initial speed of the ball
A train at a constant 60.0 km/h moves east for 21 min, then in a direction 62.0° east of due north for 29.0 min, and then west for 56.0 min. What are the (a) magnitude (in km/h) and (b) angle (relative to north, with east of north positive and wes..
A positively charged particle of mass 6.80 10-8 kg is traveling due east with a speed of 25 m/s and enters a 0.32-T uniform magnetic field. What is the magnitude of the magnetic force acting on the particle
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