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An automobile and train move together along parallel paths at 18.4 m/s.
The automobile then undergoes a uniform acceleration of -4 m/s^2 because of a red light and comes to rest. It remains at rest for 27.7s, then accelerates back to a speed of 18.4 m/s at a rate of 2.45 m/s^2.
How far behind the train is the automobile when it reaches the speed of 18.4 m/s, assuming that the train speed has remained at 18.4 m/s? Answers in units of m.
a 0.1kg ball moving at 10 m/s collides with a 1 kg block that is initially at rest. Find the ratio of the kinetic energies of the two objects after collision
a new planet which has ten times the mass of the earth and four times the radius.a what is the acceleration due to
Electromagnets that produce large magentic fields use water cooling to prevent excessive heating of the magnet's coils. How many liters of water must circulate by the coils each second if the temperature of the coils is not to exceed 49°C
A wind turbine with a rotor diameter of 50 m is rated at Y kW at a hub height wind speed of m/s. It has a cut-in wind speed of m/s and a cut-out speed of m/s.
Consider a thin spherical shell with surface charge density σ = σoCosθ and radius R centered about the origin (x=y=z=0). Here σo is a constant.
A car travels 20km at an average speed of 80km/hr and then stops for 15 mins to get fuel. It then continues on the same direction for another 20 km at an average speed of 40km/hr. What is the average acceleration of the 40km trip.
a geostationary communications satellite orbits the earth directly above the equator at an altitude of 34800.
Four identical charged particles (q = +10.9 µC) are located on the corners of a rectangle as shown in the figure below. The dimensions of the rectangle are L = 56.4 cm and W = 14.9 cm
An 83 kg fullback moving east with a speed of 5.4 m/s is tackled by a 96 kg opponent running west at 3.8 m/s, find the velocity of the players immediately after the tackle
In a particluar x-ray tube, an electron approaches the target moving at 2 108 m/s. It slows down on being deflected by a nucleus of the target, emitting a photon of energy 35 keV. Ignoring the nuclear recoil, but not relativity, compute the final spe..
Two similar guitar strings have the same length and mass, but slightly different tensions, If the beat frequency is 1.5 Hz, what is the ratio of the tensions of the two strings
A certain dog whistle operates at 22.75 kHz, while another (brand X) operates at an unknown frequency. estimate the operating frequency of brand X
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