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What minimum initial speed should the puck have been given so that it reached the teammate, assuming that the same force of kinetic friction acted on the puck everywhere between the two players?
These lasers use pulses of very intense radiation to literally blast away material. The pulses are generally 10.243 ns long and carry an energy of 2.02 mJ each. If the radiation has a wavelength of
By what numerical factor does the multiplicity of the water change? (The physical system here is the water, first existing as ice then as vapor.) Express your answer as 10^some power.
When we rotate the polarizer, does the intensity of the reflected ray change? Which kind of polarization takes place here? Why? Please use your best judgment when answering this question.
One hiker suggests they walk on another 50 m to avoid inaccurate compass readings caused by the current. Compared to the earth's magnetic field, is the current from the transmission line really a pr
A rifle with a weight of 30 N fires a 5.0 g bullet with a speed of 300 m/s. (a) Find the recoil speed of the rifle. (b) If a 700 N man holds the rifle firmly against his shoulder, find the recoil sp
To get the boat moving, you throw the stones rearward, either in succession or together, but in each case with a certain speed 15.000 m/s relative to the boat. a.) What is the resulting speed of the
They each hear a frequency greater than the 512.0Hz as the fork moves towards them; the difference in the frequencies they hear is 6.84Hz. Determine their respective distances below the overpass. Th
A person starts from rest at the top of a large, frictionless, spherical surface, and slides into the water below. At what angle ? Does the person leave the surface? (Hint: When the person leaves th
The crest of the second hill is circular, with a radius of r = 34 m. Neglect friction and air resistance. What must be the height h of the first hill so that the skier just loses contact with the sn
Upon leaving the runway at point B, the particle is traveling straight upward and reaches a height hf = 3.8 m above the floor before falling back down. Ignoring friction and air resistance, find the
A drawing shows a skateboarder moving at v = 5 m/s along a horizontal section of a track that is slanted upward by 48° above the horizontal at its end, which is h = 0.52 m above the ground. When
A skateboarder starts down the left side of the ramp with an initial speed of 5.4 m/s. If nonconservative forces, such as kinetic friction and air resistance, are negligible, what would be the heigh
An electric field varies in space according to this equation E(x) = a x e-bx, where a = 1.741 N(Cm)-1 and b = 0.845 m-1. a) For what value of x, xmax, does the electric field have its largest value?
What is the magnitude of such a ship's average acceleration in m/s2 in coming to a stop? What is the magnitude of the ship's average velocity in m/s?
Once its rocket motor is on, the combined effects of thrust and gravity give the rocket a constant acceleration of magnitude 3.00g directed at an angle of 30.0 degrees above the horizontal. For reas
A hot-air balloon is ascending at the rate of 12 m/s and is 70 m above the ground when a package is dropped over the side.
A constant magnetic field of 0.50 T is applied to a rectangular loop of area 3.0x10^-3 m^2. If the area of this loop changes from its orginal value to a new value of 1.6x10^-3 m^2 in 1.6 seconds. Wh
On a dry road, a car with good tires may be able to brake with a constant deceleration of 5.72 m/s2. (a) How long does such a car, initially traveling at 30.0 m/s, take to stop? (b) How far does it
A bug is on the rim of a disk of diameter 12 in that moves from rest to an angular speed of 78 rev/min in 5.7 s. (a) What is the tangential acceleration? (b) What is the tangential velocity of the bug
A current of 15 A flows through an electric heater operating on 120 V. What is the heater's resistance? Compute the power consumption of the electric heater in kW? How much energy does it use in 600
The Madelung constant for the KCl structure is 1.748 and the closest distance etween ions of opposite sign is 0.314 nm. On the basis of these data,what is the cohesive energy of KCl. Compare this wi
Neglecting all other sources of friction, calculate the initial acceleration of the car ,if it has been traveling at 110 km/h and is now shifted into neutral and is allowed to coast. (Take the densi
Whenever two Apollo astronauts were on the surface of the Moon, a third astronaut orbited the Moon. Assume the orbit to be circular and 680 km above the surface of the Moon, where the acceleration
Determine the tangential acceleration of the car when it is halfway through the turn (i.e. 1/4 of a circle), assuming constant tangential acceleration. Determine the radial acceleration of the car a