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A metal sphere of radius 80. mm is charged to a potential of -0.50 kV. With what velocity must an electron be fired toward the sphere if it is to just barely reach the sphere when started from a pos
The magnetic field of the Earth can be modeled as being caused by a giant bar magnet lying along the Earth's axis. If this were true, what letter (N or S) would be printed on the end of the North Po
In order to maintain wine level in the tank constant, what is the volumetric flow rate of wine into the tank? Note: Calculation the flow rate under two scenarios: (1). assuming the velocity of the l
Two solenoids of radii 2.0 cm and 5.0 cm are coaxial. They are each 25 cm long and have 500 and 2000 turns, respectively. Find the mutual inductance. Please show all work.
An astronomer is using a telescope to observe two distant stars. The stars are marginally resolved when she looks at them through a filter that passes green light near 550 nm.
According to this model, what is the equilibrium temperature of planet Earth? The radius of the Earth is Rearth = 6.38 x 106 m.
Your car key has fallen to the bottom of a clear pool of water (n = 1.33) with a uniform depth of 3.0 m. You are standing at the edge of the pool and your eyes are a height of 1.5 m above the surfa
When the wind blows, it causes the cord to vibrate at what resonant frequency?
A 75 kg man jumps from an airplane. When his parachute deploys, it exerts a 500 N force on the man at an angle of 30 degrees with respect to the vertical. What is the net force (magnitude and direct
Assume the linear wave equation describes waves at all locations on the rope. (a) Over what time interval does a pulse travel halfway up the rope?
A ball dropped from a height of 4.00m makes an elastic collision with the ground. Assuming no mechanical energy is lost due to air resistance, (a) show that the ensuring motion is periodic and (b) I
Two solenoidal coils, A and B, are wound using equal lengths of the same kind of wire. The length of the axis of each coil is large compared with its diameter. The axial length of coil A is twice a
The turntable starts from rest at t = 0, and has a uniform acceleration of 4.71 rad/s2. Find the time at which Dizzy begins to slip.
At time t=0, the suspended block is 0.80 m over the floor, and the blocks are released from rest. After 1.5 secs, the suspended block reaches the floor. What is the coefficient of kinetic friction b
The mass of the brake system is 20.0 kg and it has a specific heat of 0.200 kcal/kg °C. What is the increase in the temperature of the brakes?
Water has a specific heat capacity of 4186 J/kg °C. A tank contains 500 kg of water at 10.0°C. The water is heated up to a temperature of 90.0°C. If electricity costs $0.100 per kilowatt
What would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 23.0 KG ?
Which of the following changes would induce an electromotive force (emf) in the loop? When you consider each option, assume that no other changes occur. WHich of the following are correct, and there
A 0.50 T magnetic field is perpendicular to a circular loop of wire with 53 turns and a radius of 15 cm. If the magnetic field is reduced to zero in 0.14 s, what is the magnitude of the induced emf?
Find the magnitude of the magnetic flux through the top of a desk at this location that measures 120 cm by 89 cm.
The mass of fuel that can be ejected is 90.0% of the total mass at launch. Assuming constant gravitational acceleration, how long does it take the rocket to achieve maximum upward acceleration.
He catches the 0.430 kg ball precisely at the peak of his jump, when he is 21.2 inches off the ground. He hits the ground 1.11 inches away from where he leapt. If the ball was moving horizontally wh
Determine the time taken by the object to reach the ground level. You must explain the logic of your solution, not just a memorized formula.
A small current element at the origin has a length of 3.8 mm and carries a current of 3.7 A in the +and direction of the magnetic field due to this current element at the point (0, 3.9 m, 2.5 m).