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A small object of mass 0.0150kg & a charge of 3.1 uC hangs fromthe ceiling by a thread. A second small object, with a charge of4.2 uC, is placed 1.2m vertically below the first charge. Find
a) the electric field at the position of the upper charge due to thelower charge &
b) the tension in the thread.
assuming each galaxy contains the mass of 200 billion suns and there are 200 billion such galaxies, what is the schwarzschild radius of the universe
A 0.178 kg ball is released from rest at the top of a 57.9 m tall building. Calculate the de Broglie wavelength of the ball
A spring with a spring constant k of 18 N/m is stretched a distance of 12 cm (0.12 m) from its original unstretched position
A spinning wheel is slowed down by a brake, giving it a constant angular acceleration of 5.20 rad/s^2. What is the angular speed of the wheel at the end of the 2.80-s interval
An atomic nucleus of mass 288 u moving at 405m/s emits an alpha particle of mass 4.0 u in the direction of its velocity. If the remaining nucleus slows to 360m/s, what velocity does the alpha particle have when it is emitted.
A uniform electric field of magnitude 380 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 2.60 cm. (a) What is the work done by the field on the electron? J (b) What is the change in..
A horizontal pipe shown in the figure has a cross-sectional area A1 = 37.5cm2 at the wider portions and A2 = 9.40cm2 at the constriction. Find the flow speed at the wide portion
A steel wire in a piano has a length of 0.60- m and a mass of 4.5 x10-3 kg. To what tension must this wire be stretched in order that the fundamental vibration correspond to middle C (fC = 261.6 Hz on the chromatic musical scale).
A hot iron horseshoe (mass = 0.38 kg), just forged (Fig. 14-16), is dropped into 1.68 L of water in a 0.33 kg iron pot initially at 20 °C. estimate the initial temperature of the hot horseshoe
What are (a) x component and (b) y component of a vector in the xy plane if its direction is 329° counter clockwise from the positive direction of the x axis and its magnitude is 9.0 m.
An electron and a positron, each moving at3.0×105m/s, collide head on, disappear, Determine the momentum of each photon
The tuner starts with the tension in the E string a little low, after that tightens it. What is the frequency of the E string while she hears four beats per second.
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