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Q. A helicopter is ascending vertically with a speed of 5.98. At a height of 149 above the Earth, a package is dropped from a window. How long till the package hits ground?
Q. A sound source emits sounds of frequency 200 Hz that travel through still air at 340 m/s. The listener moves at 70 m/s relative to still air toward the stationary source. What is the wavelength of the sound between the source and listener?
In a car lift, the output plunger has a radius of 9cm. the weight of the plunger and the car is 21600N. What is the gauge pressure of the hydraulic oil used in the operating lift.
Use Gauss law to compute amount of charge
An electron is at rest just above the surface of a sphere with the radius of 1.90 mm and a uniformly distributed positive charge of 2.1 x10-15 C.
How much work is completed by the system in this process. Determine the increase in entropy produced by the parachutist; assume the air temperature is 21 degrees C. How much work is completed by the system in this process.
When a guitar string is sounded along with a 436 Hz tuning fork, a beat frequency of 5Hz is heard. When the same string is sounded along with a 434 Hz tuning fork, beat frequency is 7.00 Hz. What is the frequency of the string.
Find out the magnitude of its average acceleration between those points. Find the direction of its average acceleration between those points.
Find out the frequency of the fourth harmonic if the string is fixed at one end and free at other. (That is, if the free end is attached to a long string of negligible mass.)
What is the wavelength of the electromagnetic waves used for cell phone communications in the 900-MHz band?
A coin is placed 8 cm in front of a concave morror. T he mirror produces a real imege that has the diameter 4 times larger than that of the coin. What is the image distance.
On a safari, you are spearfishing while wading in a river. You observe a fish gliding by you. If your line of sight to the fish is 64.0° below the horizontal in air, and suppose the spear follows a straight-line path through the air and water afte..
For a damped oscillator with a mass of 380g, the spring constant 120 N/m and a damping coefficient of 76 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude at the end of 28 cycles.
A small, 300 g cart is moving at 1.60 m/s on an air track when it collides with a larger, 1.00 kg cart at rest. After the collision, the small cart recoils at 0.890 m/s.
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