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The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows with a constant acceleration -5.90 m/s2 for 4.50 s, making straight skid marks 61.0 m long ending at the tree. With what speed does the car then strike the tree?
A solenoid 88.0 cm long has a radius of 2.60 cm and a winding of 2000 turns; it carries a current of 3.60 A. Calculate the magnetic field outside the solenoid
A car crashes into a wall at 25 m/s and is brought to rest in 0.1s. Calculate the average force exerted on a 75-kg test dummy by the air bags
Write at least one paragraph in which you define focal length, object and image distance and magnification. Explain the difference between real and virtual images
Two small metal spheres with masses 2.0 {rm g} and 4.0 {rm g} are tied together by a 5.3-{rm cm}-long massless string and are at rest on a frictionless surface. Each is charged to +2.3 mu C. What is the energy.
A 75-kg piece of metal has specific heat 430 J/kg°C and is initially at 950°C. To cool it down, it is dunked into 710 kg of oil that has a temperature of 32°C and specific heat of 2700 J/kg°C. Assuming that heat flows only between the oil and the m..
A rocket is launched at an angle of ? = 46° above the horizontal with an initial speed vi = 50 m/s, What is the rocket's total time of flight
In 1993, Javier Sotomayor set a world record of 2.45 m in the men's outdoor high jump. He is 193 cm tall, determine his takeoff speed
A battery with an emf of 12 volts is coonected to a 60 watt light bulb and an ammeter. The ammeter reads 75 mA
Find the maximum usable magnification for the 200 inch Hale telescope of the Mt. Palomar observatory
A 2.50 g bullet, traveling at a speed of 465 m/s, strikes the wooden block of a ballistic pendulum. The block has a mass of 275 g. What is the speed of the bullet/block combination immediately after collision.
a 142 kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizantal is increased to ALPHA, If the coefficient of static friction between the crate and the ramp is 0.65, what is the angle alpha when the crate just begins t..
Two parallel wires separated by 4.3 cm repel each other with a force per unit length of 1.6 multiply.gif 10-4 Nm. Find the current in the other wire
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