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An elevator (cabin mass 530 kg) is designed for a maximum load of 3300 kg, and to reach a velocity of 3.5 m/s in 3 s. For this scenario, what is the tension the elevator rope has to withstand?
An electric dipole has charges of 4.55pC that are separated by 6.75cm. The dipole lies on the x-axis, its positive end lies on the +x-axis, and its center is at the origin. Located at y = +4.00cm i
The coefficient of static friction between the mug and the roof is 1.3, and the coefficient of kinetic friction is 0.3. What is the maximum acceleration of the car, so the mug does not slide off?
At the Brookhaven accelerator, protons of kinetic energy 33 GeV are made to orbit around a circle of radius 128 m. What magnetic field is required to hold the protons in the orbit?
If the velocity of a 5.0 kg object tied to a string is constant at 30 m/s when traveling in a vertical circle having a radius of 1.40. What must be the minimum strength of the string?
An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges. What is the speed vfinal of the electron when it is 10.0cm from
The electric field strength is 2.00×104 inside a parallel-plate capacitor with a 0.500 spacing. An electron is released from rest at the negative plate. What is the electron's speed when it re
Calculate the total entropy change in the outside air for the same time period. What is the net change in entropy for the system (room + outside air)?
Limit your drawing to the region between the plates, avoiding their edges, and draw the lines for surfaces that are 10.0 V apart, starting at the low-potential plate. I need to know exactly where to
If you heed the sign and slow to 40 mph, what will be your acceleration going around the curve at this constant speed? Give your answer in m/s2 and in units of g.
When a dielectric is inserted between the plates, completely filling the space, the voltmeter reads 12.5 . What is the dielectric constant of this material?
A 17.0-g piece of Styrofoam carries a net charge of -0.75 µC and is suspended in equilibrium above the center of a large, horizontal sheet of plastic that has a uniform charge density on its s
A hockey puck slides off the edge of a table with an initial velocity of 22.0 m/s and experiences no air resistance. The height of the tabletop above the ground is 2.00 m. What is the angle below th
A soccer player can kick the ball 24m on level ground, with its initial velocity at 45 degrees to the horizontal. At the same initial speed and angle to the horizontal, what horizontal distance can
A heating element is made by maintaining a potential difference of 68.0 V across the length of a Nichrome wire that has a 3.01 × 10-6 m2 cross section. Nichrome has a resistivity of 5.00 ×
Find the magnitude of the electric field at all points in space both inside and outside the slab, in terms of x, the distance measured from the central plane of the slab. What is the field for x = 1
A 2.00 kg particle has the xy coordinates (-1.20 m, 0.500 m) and a 4.00 kg particle has the xy coordinates (0.600 m, -0.750 m). Both lie on a horizontal plane. At what (a) x and (b) y coordinates mu
On the Moon, the acceleration due to the effect of gravity is only about 1/6 of that on Earth. An astronaut whose weight on Earth is 600 N travels to the lunar surface. (a) What is his weight as mea
The reaction force is the force your feet exert on the floor. The floor produces this force. The reaction force is the force the floor exerts on your feet.
We have two stationary point charges q1=3.6e-6 C and q2=6.0e-6 C, seperated by 0.50 m. a) What is the potential energy for an electron at the midpoint between the charges?
Find the electric field at radial points r where r = 11.2 cm. Discuss the criterion one would use to determine how the charges are distributed on the inner and outer surface of the shells. What is t
A disk of 1.6 g is made of zinc. The atomic number of zinc is 30 and the atomic mass is 65.39 g/mole. What is the charge of the electrons in the disk?
The resulting pattern is viewed on a distant curved screen that can show all bright fringes up to and including ±90.0° from the central spot. What is the TOTAL number of bright fringes th
A coin is placed 18.0 from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 30 is reac