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A 9.0 kg hanging weight is connected by a string over a pulley to a 5.0 kg block sliding on a flat table. If the coefficient of sliding friction is 0.20, find the tension in the string.
Approximately how far from the edge of the wedge (where it tapers to zero thickness) does the first maximum in the reflected light occur? Assume that the wedge is surrounded by air, and that the ind
Consider light that is refracted by a prism shaped like an equilateral triangle. The incident ray is parallel with the prism's base. What is the total deflection of the ray, given that the index of
A 2.0µF capacitor and a 4.0µF capacitor are connected in series across 1000 V. The charged capacitors are then disconnected from the source and connected to each other with terminals of
Two parallel metal plates have area A = 255 cm2 and are separated by l = 0.50cm. They have a potential difference of 0.25 V. Find the numerical value of the electric field. What are the charge densi
A horizontal force of 750 N is needed to overcome the force of static friction between a level floor and a 250 kg crate. If g = 9.8 m/s2 , what is the coefficient of static friction?
A 20 kg traffic light hangs midway on a cable between two poles 40 meters apart. If the sag in the in the cable is 0.40 meters, what is the tension in each side of the cable?
A sled weighs 100 N. It is held in place on a frictionless 200 slope by a rope attached to a stake at the top; the rope is parallel to the slope. Find the tension in the rope.
what is the tension in the connecting string between the blocks?
What is the total charge of the protons that must be fired at the tumor to deposit the required energy?
Rita accelerates a 0.40 kg ball from rest to 9.0 m/s during the 0.15 s in which her foot is in contact with the ball. What average force does she apply to the ball during the kick?
A rocket is moving through empty space in a straight line with constant speed. It is far from gravitational effect of the earth or any planet or star. Under these conditions, the force that must be
The maximum strength the magnetic field in an electromagnetic wave is 4.8 x 10-6 T. What is the maximum strength of the electric field of the wave?
A heat lamp emits infrared radiation whose rms electric field is Erms = 3600 N/C. (a) What is the average intensity of the radiation?
A 1270 kg person rolls along a city street at 25.0 miles per hour, and a grapefruit has a mass of 0.142 kg. What speed must the grapefruit have if its momentum is to be equal in magnitude to that of
(A) What is the electric force exerted on an electron when it is 3.0 * 10^-15 meters from the center of the nucleus? (B) What is the acceleration of the electron at this point?
A scientist claims to have developed a new method of isolating individual particles, which will enable him to detect their radial position to within 0.20 nm and their radial momentum to within 10 eV
An open hemispherical surface of radius 0.0875 m is in a magnetic field of 0.1356 T. The circular cross-section of the surface is perpendicular to the direction of the field. Calculate the magnetic
A nearsighted person wears contacts to correct for a far point that is only 3.24 m from his eyes. The near point of his unaided eyes is 25.0 cm from his eyes. If he does not remove the lenses when r
A diverging lens has a focal length of -32 cm. An object is placed 27 cm in front of this lens. Calculate (a) the image distance and (b) the magnification
Two nanow wires are separated by 1.2 nm as measured by STM. Inside the wires the potential energy is zero, but between the wires the potential energy is greater than the electron's energy by only 1.
An RL circuit consists of a resistor R=68 Onμσ, an inductor, L=31 mH, and an ac generator with an rms voltage of 120 V. At what frequency will the rms current in this circuit be 1.5 A?
Gas is confined in a tank at a pressure of 1.0 X 10^8 Pa and a temperature of 15.0 C. If half the gas is withdrawn and the temperature is raised to 65.0 C, what is the new pressure in the new tank i
A 105 -μF capacitor is connected to an ac generator with an rms voltage of 20.0 V and a frequency of 100.0 Hz. What is the rms current in this circuit?
A) what are the x and y components of the velocity of the ball 3.20 s after it leaves the cannon? B) What are the x and y components of the displacement of the arrow during the 3.20 s interval?