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A piece of Nichrome wire has a radius of 7.2 x 10-4 m. It is used in a laboratory to make a heater that dissipates 4.60×102 W of power when connected to a voltage source of 140 V. Ignoring the effect of temperature on resistance, estimate the necessary length of wire.
A 0.100g plastic bead is charged by the addition of 1 x10^10 excess electrons (i.e. so the bead becomes negatively charged). What electric field (magnitude and direction) will cause the bead to hang suspended in the air?
A box of 350N weight is at rest at the bottom of the plank that is 6.0m long and rises 30 degree above the ground. what is the velocity of the box at the top of the plank
Consider a 0.11 cm focal length microscope objective that is 0.29 cm from the object being viewed. What magnification is being produced by the objective
The phase angle of an RLC series circuit with an inductive reactance of 200 ? and a capacitive reactance of 100 ? is 40.0°. What is the value of the resistor in this circuit
A room has dimensions 2.58 m (height) × 5.89 m × 6.33m. A fly starting at one corner flies around, ending up at thediagonally opposite corner. (a) What is the magnitude of its displacement? (b) If the fly walks rather than flies, what is the length o..
A golf ball of mass 0.050 Kg is hit off the tee at a speed of 35 m/s. The golf club was in contact with the ball for. Find the average force exerted on the ball by the golf club
A step-down transformer is used for recharging the batteries of portable devices. calculate rms output voltage of the transformer
An object is held at distance 30 cm in front of the first lens
On a certain planet, a 10 kg rock has a gravitational potential energy of 1,056 J when it is resting on a cliff 12 m above the surface
The first electron has the initial velocity v0 that makes an angle θ=45° with the lower plate and has a magnitude of 7.53×106 m/s. would this electron strike one of the plates? If so, what is the horizontal distance from the left edge? If not enter t..
An egg is thrown nearlyvertically upward froma point near the cornice of a tall building.it just misses the cornice on the way down, how high does it rise above its starting point
A neutron of initial kinetic energy (Eini) scatters elastically from a target nucleus which is initiallt at rest. Find the maximum and average fractional kinetic energy loss F=1-(Efinal/Einitial)
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