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Suppose a car is traveling at + 19.7 m/s, and the driver sees a traffic light turn red. After 0.486 s has elapsed, the driver applies the brakes, and the car decelerates at 7.00 m/s^2. What is the stopping distance of the car, as measured from the point where the driver first notices the red light?
A 25 g glass tumbler contains 410 mL of water at 24°C. If four 20 g ice cubes each at a temperature of -3°C are dropped into the tumbler, what is the final temperature of the drink
A red laser, with a wavelength of 640 nm, shines on a diffraction grating with a grating spacing of 500 lines/mm. The resulting diffraction pattern is observed on a screen 1.00 meters away from the grating.
A 46.0-kg girl is standing on a 159-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, What is the velocity of the plank relative to the ice surface
You do 9.5J of work to stretch a spring with k=210N/m, starting with the spring unstretched. How far does the spring stretch
A rookie quarterback throws a football with an initial upward velocity component of 15.2 meter per second and a horizontal velocity component of 18.1 m/s. Determine how much time is required for the football to reach the highest point of the trajec..
A 205 kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30 degrees with respect to the horizontal.
The distance from the earth to the center of our galaxy is about 23000ly(1yr is 9.47x10^15m), as measured by an earth based observer. how long will it take to make the trip
When cars are equipped with flexible bumpers, they will bounce off each other during low-speed collisions, thus causing less damage. In one such accident, a 1850car traveling to the right at 1.40 collides with a 1400 car going to the left at 1.10 ..
Two Resistors of R1 = 3.23 ohm and R2 = 5.95 ohm are connecred in series to a battery whith an EMF of 24.0 v, Find the current I1 through the first resister
A 450 Newton rightward force is used to drag a large box across the floor with a constant velocity of 0.678 m/s. the coefficient of friction between the box snd thr floor is 0.795. Determine the mass of the box
A river flows south with a velocity of 20 km/h. A boat has a maximum speed of 50 km/h in still water. In the river, at maximum throttle, the boat heads due west. What are the resultant speed and direction of the boat?
A golfer hits a shot to a green that is elevated 3.30 m above the point where the ball is struck. find the speed of the ball just before it lands
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