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The electric field everywhere on the surface of a charged sphere of radius 0.240 m has a magnitude of 580 N/C and points radially outward from the center of the sphere. (a) What is the net charge on
Two point charges attract each other with an electric force of magnitude F. If one charge is reduced to one-third its original value and the distance between the charges is doubled, what is the resu
A 225 turn rectangular coil having dimensions of 3.4 cm by 4.8 cm is placed in a uniform magnetic field of magnitude 0.88 T (a) Find the current in the coil if the maximum torque exerted on it by the
A model of a helicopter rotor has four blades, each 3.50 m in length from the central shaft to the blade tip. The model is rotated in a wind tunnel at 690 rev/min. (a) What is the linear speed of th
What are the velocities of the two people after the snowball is exchanged? Disregard friction between the skates and the ice.
A horizontal spring is lying on a frictionless surface. One end of the spring is attached to a wall whle the other end is connected to a movable object.
Three 4.0-uF capacitors are connected in parallel across the terminals of a 60.0-Hz generator. What is the capacitive reactance of the circuit?
What happens if concave lens is filled with water ,assuming the refractive index for lens is 1.6 and Dioptre = 5 per metre and a planer-concave lens.? a) Is it possible to create a net postive lens
A block of ice at 0 C whose mass is initially 50.0 kg slides along a horizontal surface, starting at a speed of 5.38 m/s and finally coming to rest after traveling 28.3 m. Compute the mass of ice me
You have a symmetric double concave lens with power D = -2 per meter. a) Determine the radius of curvature and the principle planes (assume a 1mm vertex separation).
Now the incline has a coefficienct of kinetic friction uk, if the block attached to the springs is observed to stop just as it reaches the spring's equilibrium position, what is the coefficient of f
A uniform electric field is changing over time by a rate of 7.0 . If the displacement current is 5.1×10-9 through a 1.0 surface, what is the angle that the electric field makes with the plane of
A circuit consists of a 1-mH inductor connected in series with a 2-O resistor and a 10-V battery connected for a long time. After the battery is removed from the circuit, how long does it take the c
At what speed must he drive for the remainder of the trip to complete the trip in the usual amount of time?
which is a half-life of 87.7 years. If this decay reaction is the only source of energy available to this device, determine the initial mass of 238^Pu required so that it has sufficient power for it
A 6kg bowling ball is held above a spring(k= 500 N/m) and dropped. If the spring compresses a distance of 25 cm, how high above the spring's original uncompressed position was the ball dropped?
An 80 kg skier starts from rest at the top of a hill that is 20 meters high and slides down a 30 degree slope. If the coefficient of friction between the skis and the snow is 0.2, find the skier's
What is the minimum speed that a Gravitron or Round- Up type ride must spin so that a person doesn't slide out of the bottom when the floor is dropped away. The ride has a radius of 8 m and the maxi
Explain why an ammeter should have a small internal resistance, while a voltmeter should have a very large internal resistance.
A 47g golf ball is driven from the tee with an initial speed of 52m/s and rises to a height of 24.6m (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b)
You push a box along the floor against a constant force of friction. When you push with a horizontal force of 77.4 N the acceleration of the box is 0.481 m/s2; when you increase the force to 83.1 N
(a) How far would the charge go before it comes to a stop? (b) Now let us say that instead of a constant E-field on the -x direction, that another charge q lies ahead of our moving charge at a dista
After equilibrium the object is removed from the hot water and placed in 200 grams of water at 0 degrees celsius. what is the final temperature of the object?
If the potential on the outer surface of the membrane is +68.0 mV greater than that on the inside surface, how much charge resides on the outer surface?
Determine the parachutist's acceleration when the chute is just opened, assuming his mass is 60 kg.