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Two small particles have charges Q1 = +4.0 C and Q2 = ?7.0 C. If the magnitude of the electric force between the particles is 115 N, what is the distance among the particles?
A 3.20 kg block of wood sits on a table. A 2.50 g bullet, fired horizontally at a speed of 600 m/s, goes completely through the block, emerging at the speed of 180m/s. What is the speed of the block immediately after the bullet exits.
A transformer has 100 turns in its primary windings and 500 turns in its secondary winding. calculate the secondary voltage and current
A charged particle moves in a circle in a magnetic field. (a) Starting with the force relation, write the equation for the radius of the circle
A Porsche 944 Turbo has a rated engine power of 217 . 30% of the power is lost in the drive train, and 70% reaches the wheels. The total mass of the car and driver is 1500 , and two-thirds of the weight is over the drive wheels.
An object moving with uniform acceleration has a velocity of 10.0 cm/s in the positive x-direction when its x-coordinate is 3.09 cm. If its x-coordinate 3.05 s later is ?5.00 cm, what is its acceleration?
During an etiquette class, you walk slowly and steadily at 0.20 {\rm{ m/s}} for 2.5 {\rm m} with a 0.75 {\rm kg} book balanced on top of your head
A2.85-kg bucket is attached to a disk-shaped pulley of radius 0.121m and mass 0.742 kg. If the bucket is allowed to fall, (a) what is its linear acceleration? (b) What is the angular acceleration of the pulley? (c) How far does the bucket drop in 1.5..
A uniform cord of length 4.0 cm and mass 26 g is initially stuck to a ceiling. What is the change in the gravitational potential energy of the cord
A student is sleeping under a small goose-down comforter that has coefficient of thermal conductivity of 0.025 W/m °C. what is the rate of heat flow through the comforter
a rectangle has been measured to have sides in cm 23.42 24.25 13.11 13.42 each with uncertainty 0.05 cm. calculate with
A 50.0 kg boy runs at a speed of 10.0 m/s and jumps onto a cart. The cart is initially at rest. what is the mass of the cart
The entire string is 2.00m long and has a mass of 400-g. The vibrating section of the string is 1.90m long. What tension is needed to tune this string properly.
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