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By what factor is the electric force on a sphere larger than its weight?
A 70-kg stunt pilot pulls out a drive while flying at 50 m/s. If he flies a circular path with a radius of 200 m, what force does his seat exert on him at the bottom of the path?
A bus was initially traveling with a velocity of 50 km/hr east. Later it was observed traveling with a velocity of 100 km/h north. What was the change in velocity of the bus?
In view of these data, the brightness of Delta Cepheid at time t, where is measured in days, has been modeled by the function (a) Find the rate of change of the brightness after days.
Two objects in outer space accelerate toward each other under the influence of their mutual gravitational attraction. If one object has five times the mass of the other, how do their acceleration
A string is wound tightly around a fixed pulley whose radius is 5.0 cm. As the string is pulled, the pulley rotates without slipping. What is the angular speed of the pulley when the string has a l
A garden hose with an internal diameter of 2.0 cm is connected to a (stationary) lawn sprinkler that consists merely of an enclosure with 30 holes, each 0.18 cm in diameter.
The displacement (in meters) of an object moving in a straight line is given by s = 1 + 2t + t2/4, where is measured in seconds.
A square with sides of length 2m is perpendicular to a magnetic field of strength 10 T, is rotated by 60 degrees in the course of 4s. What is the induced emf in the square? In what direction does
An isolated quantity of an ideal gas at 290.9 K has a volume of 12.97 L at a pressure of 1.84 atm. What is the pressure of this gas sample when the volume is reduced to one third and the absolute temp
A total of 39 bright and 39 dark Newton's rings (not counting the dark spot at the center) are observed when 570 nm light falls normally on a planoconvex lens resting on a flat glass surface.
If the angle between the first dark fringes on either side of the central maximum is 34.0° (dark fringe to dark fringe), what is the frequency of the light used (THz)?
Meters mounted in the flow on each side of the transition coupling show a change in gauge pressure of 74.0 kPa. Determine the flow rate through the system, taking the fluid to be ideal.
The muon is traveling at 0.982 c, what is its momentum? (The mass of such a muon at rest in the laboratory is known to be 207 times the electron mass.)
A 8.9 µm thick fine metal foil separates one end of two pieces of optically flat glass. When a monochromatic light is incident normally, There are 35 dark fringes observed. What is the wave
A charge of 5 C moves upward at 2 m/s in a magnetic field of 0.3T that points into the page. What is the magnitude and direction of the force that the charge experiences?
A car of massmtraveling at speedvcrashes into the rear of a truck of mass 2mthat is at rest and in neutral at an intersection. If the collision is perfectly inelastic, what is the speed of the combi
A tungsten target is struck by electrons that have been accelerated from rest through a 29.9-kV potential difference. Find the shortest wavelength of the radiation emitted.
Suppose a car is traveling along a straight road at 40 mph. The car then brakes to a stop. Does this violate conservation of momentum? If conservation of momentum is violated, explain how this happe
A hoop with a mass of 2.75 kg is rolling without slipping along a horizontal surface with a speed of 4.50 m/s when it starts down a ramp that makes an angle of 25.0° with the horizontal.
A certain superconducting magnet in the form of a solenoid of length 0.350 m can generate a magnetic field of 8.50 T in its core when its coils carry a current of 65 A. Find the number of turns in t
An organ pipe open at both ends is vibrating with n = 3 with a frequency of 769 Hz. The length of the pipe is 0.5 m. Determine the speed of sound (m/s) in air in the pipe.
Write down the wave function Ψ(x) for an electron in the n=3 state of a 10-nm wide infinite well with the center of the well being at x=0.
A standing wave is established in a 89 cm long string fixed at both ends. The string vibrates in 6 segments when driven at 376 Hz. What is the fundamental frequency?
Calculate the temperature at which a tungsten filament with an emissivity of 0.28 and a surface area of 7.6 × 10-5 m2 will radiate energy at the rate of 30 W in a room where the temperature is