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The occupant of a small vechical hears a frequency of 1.5x10^3 Hz emitted from a stationary space buoy which she is approaching with 80m/s. She comes to a halt and now hears 1.4x10^3 Hz. What is the speed of sound on the planet?
A hotel elevator ascends 200 m with maximum speed of 5m/s . Its acceleration and deceleration both have a magnitude of 1.0 m/s^2 . a.)How far does the elevator move while accelerating to full speed from rest?
A 1500 car travelling at 26 suddenly runs out of gas while approaching the valley that looks like an inverted hump. 12m at the left where the care runs out of gas and 19 m at the right were it is headed. What will be the car's speed as it coasts into..
What is the terminal speed for a 76.0 skier going down a 41.0 snow-covered slope on wooden skis = 0.070? Suppose that the skier is 1.80 m tall and 0.500 m wide. Replace mg with net forces parallel to the incline.
We wish to maintain a pattern with a given number of loops and a fixed given frequency, If we reduce the density of the string
A light plane is headed due south with a velocity of 157 km/h relative to still air. After 1.00 hour, the pilot notices that they have covered only 121 km and their direction is not south but southeast (45.0^circ).
The dipole moment of a water molecule in liquid water is 6.2×10-30 C•m, and the effective diameter of the water molecule is 2.8×10-10 m. In an earlier homework problem the effective dipole charge separation for water was calculated as 1.9×10-11 m.
What is the wavelength of the waves emitted by source? What is the difference in frequency between the directly radiated waves and the waves reflected from a whale traveling straight toward the ship at 4.95 ? Assume that the ship is at rest in the..
If the parachutist comes to rest with constant acceleration over a distance of 0.710 m, illustrate what force does the ground exerts on her?
During 0.12 s, a wheel rotates through an angle of 2.34 rad as a point on the periphery of the wheel moves with a constant speed of 2.29 m/s
You push with a 20 N horizontal force on a 2 kg mass resting on a horizontal suface against a horizonatal friction forces of 12N. What is the accerlation.
Assume that, as lying on a beach near the equator watching the Sun set over a calm ocean, you start a stopwatch just as the top of the Sun disappears. You after that stand, elevating your eyes by a height H = 1.90 m.
An inflated rubber balloon is rubbed with a wool cloth till an excess of a billion electrons is on the balloon. What is the magnitude of the charge on the balloon.
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