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A 1.5m wire carries a 7 A current when a potential difference of 57 V is applied. What is the resistance of the wire?
a 72 kg block is hanging in the air suspended by a rope, tied up and over a frictionless pully, to a second block of unkown mass. calculate the mass of the block on top of the cliff
Two charged bodies exert the force of .145N on each other. If they are moved so that they are one fourth as far apart, what force is exerted.
A uniformly charged insulating rod of length 19.0 cm is bent into the shape of a semicircle. The rod has a total charge of -7.50 µC. Find the magnitude and direction of the electric field at O, the center of the semicircle. EO = N/C.
A wire has a resistance of 22.9 ohm. It's melted down, and from the same volume of metal a new wire is made that is four times longer than the original wire. Find what is the resistance of the new wire
question1a piece of aluminium specific heat 0.910 kjkg 0c of mass 138 g at 74 0 c is dropped into a styrofoam cup
A 100 W lightbulb produces 4.0 W of visible light. What is the light intensity on a wall 3.0 m away from the lightbulb
What is the shortest the address on a typical international letter could be, if it is to get to a unique human recipient? (Assume the permitted characters are [A-Z,0-9].) How long are typical email addresses?
A block of mass 77 g floats on a fluid, oscillating up and down at a frequency of 8 Hz. What is the value (in N/m) of the effective spring constant of the fluid
You walk west 240m and then north 150m. What is the magnitude of your displacement vector
A projectile is launched from ground level at an angle of 1.0° above the horizontal. It returns to ground level. To what value should thelaunch angle be adjusted, without changing the launch speed, sothat the range triples?
A small block with a mass of 0.170 kg is attached to a cord passing through the hole in a frictionless, horizontal surface .The block is initially revolving at a distance of 0.50 m from the hole with a speed of 0.80 m/s. The cord is then pulled from ..
A glass lens has a scratch-resistant plastic coating on it. The speed of light in the glass is 0.659c, At what angle with respect to the normal is the ray transmitted
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