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A hot air balloon is ascending straight up at a constant speed of 5.70 m/s. When the balloon is 11.0 meter above the ground, a gun fires a pellet straight up from ground level with an initial speed of 33.0 m/s. Along the paths of the pellet and the balloon, there are two places where each of them has the identical altitude at the same time. Compute how far above ground level are these places?
A solenoid contains 780 coils of very thin wire evenly wrapped over a length of 17.5cm . Each coil is 2.50cm in diameter. what is the magnetic field at its center
A pair of oppositely charged parallel plates are separated by a distance of 5 cm with a potential difference of 550 V between the plates. A proton is released from rest at the positive plate at the equal time that an electron is released from rest..
A compound microscope has an objective lens of focal length 15.0 mm and an eyepiece that gives an angular magnification of 5.00 for a final image at infinity, What is the total magnification of the microscope
Two workers are moving a slab of ice (m = 410 kg) across the factory floor. As seen from above, one worker exerts a force of 255 N at an angle of -50o, At what angle does the ice slab accelerate
A 4900 kg lunar lander is in orbit 60 km above the surface of the moon. How much work must the thrusters do
A certain stick has a proper length of one meter. Observer A, moving with uniform velocity parallel to the stick, measures the length to be one quarter of its proper length. Observer B, at rest with respect to the stick, records the two events cor..
A small spinning asteroid is in a circular orbit around a star, much like the earth's motion around our sun. The asteroid has a surface area of 9.5 m2. calculate the equilibrium temperature of the asteroid
a 5.00 m length of 1.8 mm diameter wire carries a 700 ma current when 18.0 mv is applied to its ends. assume the drift
Weight of a box is 150 pounds. The horizontal force required to move the box is 70 lb. What horizontal force is required if 60lbs is added to box.
An ac voltage source is connected in series with a1.4-?F capacitor and a 690-? resistor. Using a digital ac voltmeter, the amplitude of the voltage source is measured to be 4.0?V rms, Determine the frequency of the ac voltage source
Two equal, but oppositely charged particles are attracted to each other electrically. evaluate the magnitude of the charges
after flying for 15 min in a wind blowing 42 kmh at an angle of 28deg south of east an airplane pilot is over a town
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