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A charging cell phone battery requires a current of 1.60 A and power is dissipated in the battery at 7.52 W. Determine the current drawn from the wall by the charger
The aurora is caused when electrons and protons, moving in the earth's magnetic field of ?5×10?5 T, collide with molecules of the atmosphere, find Radius of the electron and proton in m
For each of the currents listed in table 2, and using the inductance of the coil found by experiment, determine the total stored energies in the coil
The displacement of a standing wave on a string is given by D = 9.9 sin(0.55x)cos(56t), where x and D are in centimeters and t is in seconds. What is the distance (cm) between nodes
Three balls with masses of 6 g at (1,9), 1 g at (7,6), and 7 g at (5,1), respectively, are connected by massless rods. What is the acceleration of the center of mass
An 0.8kg baseball with an initial velocity of 40m/s is hit with a baseball bat so that its recoil velocity is 60m/s in the exact opposite direction. what is the average force the bat puts on the bal
A certain red giant star has a luminosity of 100,000 times that of the Sun and is located 600 light-years from Earth. calculate the rate of interstellar extinction in the direction of the star
the speed of light in a certain material is measured to be 2.2*10^8 m/s. what is the index of refraction of this material
An RL series circuit has R = 72.0? and L = 2.20mH . The series combination is connected across a 155V (rms), 58Hz power supply. Find the impedance of the RL combination
A 16.0-? resistor, a 12.0-µF capacitor, and a 17.0-mH inductor are connected in series with a 170-V generator. At what frequency is the current a maximum
The stoplight had just changed and a 1900kg Cadillac had entered the intersection, heading north at 3.8m/s, How fast was the Volkswagen going just before the impact
A 1.10m long ramp is inclined at 16? to the horizontal. A solid ball is released from rest at the top of the ramp. Find its translational acceleration
A 85 kg window cleaner uses a 14 kg ladder that is 5.9 m long. He places one end on the ground 3.4 m from a wall, find the angle (relative to the horizontal) of that force on the ladder
Calculate the wavelength of light in vacuum that has a frequency of 6.1 105 Hz. Calculate the energy of one photon of such light in vacuum
The primary winding of a transformer has 1200 turns, and is connected to 120 V A.C. (r.m.s. value). The secondary has a 25 W load resistor, Continuing, how many turns are in the secondary winding
A hoop and a disk, both of 0.72- m radius and 4.0- kg mass, are released from the top of an inclined plane 2.5 m high and 8.9 m long. What is the speed of the hoop
A solid bowling ball with a radius of 10.9 cm and a mass of 7.3 kg rolls along a bowling alley at a linear speed of 2.4 m/s
The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with an rms value of 1.50 × 10-10 T. How much energy does this wave carry through the window during a 3
A converging lens (f = 14.9 cm) is located 24.6 cm to the left of a diverging lens (f = -7.07 cm). Locate the final image of the stamp relative to the diverging lens
The naturally occurring charge on the ground on a fine day out in the open country is -1.00 nC/m2. Calculate the electric potential at this height
A rectangular metal block is 0.6 m long, 0.2 m wide, and 0.1 m tall. The block weighs 270 N. What is the density of the fluid
Waves travel at different velocity in different medium. How does wave velocity effect wave frequency
You want to produce a magnetic field of magnitude 5.50×10?4T at a distance of 4.00×10?2m from a long, straight wire. What current is required to produce this field
If a disk rotating at 10 rad/s has a moment of inertia of 0.5 kg m^2. Then another disk with a total mass of 5 kg, What is the angular speed of the new system in units of rad/s