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There are 1 x 1079 electrons in the universe. The following numbers may be useful: me = 9.11 x 10-31kg, mp = 1.67 x 10-27kg, qp = -qe = 1.6 x 10-19C. (a) Compute the total charge of the electrons in the universe.
An astronaut notices that a pendulum which took2.45 {\rm s} for a complete cycle of swing when the rocket waswaiting on the launch pad takes 1.29 {\rm s} for the same cycle of swing during liftoff. What is the acceleration of the rocket
A ray of light travels from air into another medium, making an angle of θ1 = 45.0o with the normal as in the figure below. Find the angle of refraction θ2 if the second medium is fluorite. (The index of refraction for fluorite is 1.434.)
During a testing process, a worker in a factory mounts a bicycle wheel on a stationary stand and applies a tangential resistive force of 115 N to the tire's rim. what force must be applied to the chain
A concave mirror forms an image on a screen twice as large as the object. how far is the object moved
You dip our finger into a pot of water twice each second, producing waves with crests that are separated by 0.15 meter. Find the frequency period and speed of these water waves
two capacitors have the same plate separation but one has square plates and the other has circular plates. the square
Physics A point charge q1=15.00uC is held fixed in space. From a horizontal distance of 3.00cm, What is the acceleration of the sphere at the instant when its speed is 26.0m/s
Determine the capacitive reactance, the inductive reactance, the circuit impedance, and the maximum current in the circuit.
Two capacitors are connected parallel to each other. Let C1= 3.50?F ,C2 = 5.50?F be their capacitances, Calculate the potential difference across each capacitor
A runner with the weight of 686.7 N accelerates at a constant rate from 0 to 45 m/s in the first 2 seconds of a 100 m sprint. What is the net force
An electron with an initial speed of 5.50 × 105 m/s is brought to rest by an electric field. What was the potential difference that stopped the electron
At t=0 a grinding wheel has an angular velocity of 24.20 rad/s. It has a constant angular acceleration of 24.2 rad/s^2 until a circuit breaker trips at t = 1.2 seconds.
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