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A block rests on a horizontal, frictionless surface. A string is attached to the block, and is pulled with a force of 44.0 N at an angle θ above the horizontal. After the block is pulled through a distance of 17.0 m its speed is v = 2.10 m/s, and 55.0 J of work has been done on it.What is the mass of the block?
Three identical masses of 800 each are placed on the x axis. One mass is at = -110 , one is at the origin, and one is at = 340 What is the magnitude of the net gravitational force on the mass at the origin due to the other two masses?
A grating spectrometer is used to resolve second order peaks from two wavelengths of ?1 = 495.00 nm and ?2 = 495.71 nm. What is the minimum number of slits this grating must have
a 0.30-kg puck initially at rest on a frictionless horizontal surface is struck by a 0.20-kg puck that is initially
An alpha particle (m = 6.7 ´ 10-27 kg, q = +3.2 ´ 10-19 C) has a speed of 20 km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle throughout this motion. Find out an electric potential difference V..
A very long, straight cylindrical conductor with radius R and length L carries a uniformly distributed net charge Q. What are the bound surface charge densities at r = 2R and at r = 4R
A toaster rated at 1055 W operates on a120 V household circuit and a 4.00 m length of Nichrome wire as its heating element. The operating temperature of this element is304°C. What is the cross-sectional area of the wire?
Illustrate what are the possible weaknesses in the Kimberely Process? Illustrate what role do you think the three sectors will have in addressing these weaknesses?
Superman leaps in front of Lois Lane to save her from a volley of bullets. Determine the average force exerted on Superman chest if the bullets bounce back after an elastic, head-on collision
A string 2.0 m long has a mass of 2.4 x 10-2 kg. When fixed at both ends, it vibrates with a fundamental frequency 150 Hz. What is the speed of the wave on this wire? What is the frequency of its third harmonic?
Two parallel wires are separated by a distance of 5.00 cm. Each wire carries a current of 2.70 A in the same direction. Find the magnitude of the force per unit length exerted by one of the wires on the other. Is the force attractive or repulsive
A piece of iron of volume 5.13 x 10^(-4) m³ is supported by a string while submerged in water. What is the tension in the string
Find the resultant magnetic force exerted by the long wire on the square current loop in the figure below if I1 = 8.72 A and I2 = 4.12 A
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