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A 47-ohm-resistor can dissipate up to 0.25 Watt of power without burning up. Find the smallest number of such resistors that can be connected in series across a 9.0-Vot battery without anyone of them burning up?
For the RL circuits a simple RL circuit let the inductance be 3.0H, the resistance 7.50 and the battery emf at 36v. At t=0 the switch is closed. After a very long time what is the voltage across the Inductor
A bullet is fired through a board 9.0 cm thick in such a way that the bullet's line of motion is perpendicular to the face of the board. Find the total time the bullet is in contact with the board
One end of a nylon rope is tied to a stationary support at the top of a vertical mine shaft of depth 83.0 m. What is the wave speed at the top of the rope
A resistance thermometer using a platinum wire is used to measure the temperature of a liquid. The resistance of is 2.42ohms at 0 degrees, calculate the temperature of the liquid
An electron is traveling through a region of space in which the electric field is along the +x direction and has a magnitude of 2313 N/C. What is the acceleration of the electron? magnitude m/s2 direction
The Mars rover was deployed on the surface of Mars in July 1997. At one point during its subsequent mission, radio signals took about 9 min to travel from Earth to the rover. How far was Mars from the from Earth at that time? ___________m
A dc motor is connected to a constant emf of 13.9 V. The resistance of its windings is 2.0 ?. What current does it draw at normal operating speed
A garden hose with an internal diamter of 1.9 cm is connected to a (stationary) lawn sprinkler that consists merely of a container with 24 holes, each of 0.13 cm in diamter. If the water in the hose has a speed of 0.91 m/s, at what speed does it leav..
A solid steel cylinder is standing (on one of its ends) vertically on the floor. The length of the cylinder is 3.5 m and its radius is 64 cm. What is the weight of the object
The current in an RL circuit is zero at time t = 0 and increases to half its final value in 3.6 s. What is the time constant of this circuit
q1. what mass in grams of steam at 100degc should be mixed with 257 g of ice at its melting point in the thermally
State Newton's three laws of Motion and What is the difference between elastic collision and inelastic collision
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