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A solid sphere of radius R = 40cm has a total positive charge of 26 mC uniformly distributed throughout its volume (the sphere is a non-conductor). Calculate the magnitude of the electric field at
a. What equal positive charges would have to be placed on the earth and on the moon to neutralize their gravitational attraction?
A copper penny has a mass of 3.1 g. Being electrically neutral it contains equal amounts of positive and negative electricity.
How does the mass density compare to the density of individual neutrons (take them to have a radius of 2.3 attometers.
A sound source of 500 Hz with an acoustic power of 1/10 of a watt how do you find the intensity 1/2 a m from the source, the pressure amplitude, and the magnitude of the specific acoustic impedance
A certain rain cloud at an altitude of 1.75 km contains (3.20 x 10^7) kg of water vapor. How long would it take a 2.70-kW pump to raise the same amount of water from the Earth's surface to the cloud
The turbin develops a power output of 1MW. at the inlet the pressure is 6 MPa , the temeperature is 500c and the velocity is 10 m s-1. calculate the rate of heat transfer between the turbine and the
(a) Find the force acting on the electron as it revolves in a circular orbit of radius 5.34 x 10-11 m. (b) Find the centripetal acceleration of the electron.
A person stands on a scale in an elevator. As the elevator starts, the scale has a constant reading of 598 N. As the elevator later stops, the scale reading is 392 N. Assume the magnitude of the acc
A 6300-kg satellite is in a circular earth orbit that has a radius of 3.0 x 107 m. A net external force must act on the satellite to make it change to a circular orbit that has a radius of 8.3 x 106 m
A proton is fired from far away toward the nucleus of a mercury atom. Mercury is element no.80. If the initial velocity of the proton is 4 x 107 m/s, what is the distance of closet approaching to th
In being launched from rest it moves through a distance of 87 m and has a kinetic energy of 5.00 x 107 J at lift-off. What is the work done on the jet by the catapult?
The vertical component of the Earth's magnetic field at this location has a magnitude of 44µT. What is the magnitude of the induced emf between the ends of the beam?
Draw the vector starting at the rowboat. The location, orientation and length of the vector will be graded. The vector's length is displayed in meters per second.
The two shells are fired at the same speed. Assume that air resistance is negligible and that the magnitude of the acceleration due to gravity is .
Now, consider that both shells are fired at an angle greater than 45 degrees with respect to the horizontal. Remember that enemy ship A is closer than enemy ship B A) Which shell reaches the greater
The vertical component of the earth's magnetic field points down, toward the surface of the earth, and has a magnitude of 2.45 x 10-5 T. What is the acceleration of an electron due to this field comp
Now, consider both shells are fired at an angle greater than 45 degrees with respect to the horizontal. Remember that enemy ship A is closer than enemy ship B A) Which shell is launched with a great
A battleship simultaneously fires two shells toward two identical enemy ships. One shell hits ship A, which is close by, and the other hits ship B, which is farther away. The two shells are fired at
A helicopter propeller blade starts from rest and experiences a constant angular acceleration of 14.5 rad/s2. Find the speed of a point on the blade 2.15 m from the axis of rotation when the blade has
A sphere of radius r starts from rest and rolls without slipping along a curved surface, dropping through a vertical distance of 0.440 m. Find the final speed v of the sphere's center of mass.
A 1.90 cm X 1.90 cm parallel-plate capacitor has a 2.40mm spacing. The electric field strength inside the capacitor is 1.50×10^5 V/m. A) What is the potential difference across the capacitor?
An infinitely long line of charge has a linear charge density of 3.50×10^-12 C/m . A proton is at distance 13.0 cm from the line and is moving directly toward the line with speed 2200 m/s . Ho
Calculate the work done by the spring when it is stretched from its equilibrium position to 0.056m past its equilibrium. Answer in units of mJ.
Calculate the tensional force inside Io, as a result of Jupiter's gravitation.