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An electroscope has been charged by induction using an ebonite rod rubbed with fur. A charged object is brought close to the top of the electroscope and it was noted that the leaves of the electroscope opened further. Identify the charge on the object and explain your reasoning.
two charged concentric spheres have radii of 9.6 and 15.1 cm. the charge on the inner sphere is 4.09 multiplied by 10-8
The neutrons in a neutron star (Chapter 44 in the textbook) can be treated as a Fermi gas by neutrons in place of the electrons in our model of an electron gas.
Two capacitors give an equivalent capacitance of 10.00 pF when connected in parallel and an equivalent capacitance of 1.75 pF when connected in series. What is the capacitance of each capacitor
The escape velocity of a bullet from the surface of planet Y is 1727 m/s. Calculate the escape velocity from the surface of the planet X if the mass of planet X is 1.490 times that of Y, and its radius is 0.8790 times the radius of Y (in m/s).
A placekicker must kick a football from a point 36.0 m (about39.0 yd) fm the goal, and the ball must clear the crossbar, whichis 3.05 m high. Does the ball approach the cross bar while still rising orwhile falling
The lens-to-retina distance of a patient is 0.0201m and the totally relaxed strength of her eye is 50.0D. (a) What lens strength will correct her distant vision? (b) If the eye has an 8% ability to accommodate, what will be the closest object she can..
Force F = -13jhatN is exerted on a particle at r = (3ihat+5jhat)m. What is the torque on the particle about the origin
Stan accelerates from a standing start at 2 m/s^2 and one second later Kathy accelerates from a standing start at the same position at 4 m/s^2. how long does it take Kathy to catch Stan
A mover places a 65 kg crate on a ramp by a slope if 25 above the horizontal. With what horizontal force should the mover push on the carte so that it stays in place? Suppose no friction.
A square coil and a rectangular coil are each made from the same length of wire. Each contains a single turn. The long sides of the rectangle are twice as long as the short sides.
You run a microwave for 6 minutes together with a 1500 W boom-box and a 2800 W space heater. What is the power of your microwave
Your projectile launching system is partially jammed. It can only launch objects with an initial vertical velocity of 42.0 m/s, What horizontal velocity do you need to program into the system
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