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A typical car under hard braking loses speed at a rate of about 6 m/s2. The typical reaction time to engage the brakes is 0.50 s. A local school board sets the speed limit in a school zone such that all cars should be able to stop in 5.0 m. What maximum speed does this imply for a car in the school zone?
The spaceship Lilac, based on the Purple Planet, is 791 m long, as measured at rest. When Lilac passes Earth, Terran observers measure its length to be 733 m.
A vector is located in the x-y plane. The x component is 4.00 m and the y component is 3.00 m. Find the angle that this vector makes with the positive y-axis
A cord is used to vertically lower an initially stationary block of mass M = 40 kg at a constant downward acceleration of g/3. Find the work done by the cord's force on the block
Three boxes are connected by light strings. The force pulling on the third box is 30 N. What is the tension between box 2 and box 3
Field Retards Motion An electron with a speed of7.50 multiplied by 108 cm/s enters an electric fieldof magnitude 1.00 multiplied by 103 N/C, traveling along thefield in the direction that retards its motion.
A 2.0cm tall object is located 18.0cm in front of a converging lens with a focal length of 10.0cm. Is it virtual or real
A bullet of mass mb = 16 g is fired with a speed of 260 m/s at a target that is a sheet of metal (mass mt = 410 g). what is the angular velocity of the target plus bullet just after the bullet hits
The masses and coordinates of three spheres are as follows: 14 kg, x = 1.25 m, y = 1.25 m; 38 kg, x = -2.50 m, y = -2.00 m; 62 kg, x = 0.00 m, y= -0.50 m. What is the magnitude of the gravitational force
A bit of computer memory is some physical object that can be in two different states, often interpreted as 0 and 1. A byte is eightbits, a kilobyte is 1024 bytes. If this entropy is dumped into an environment at room temperature, how much heat mus..
The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on earth? Give the answer by determining the ratio Fsun/ Fmoon of magnitudes of gravitational forces.
A parallel-plate capacitor has an area of 5.15 cm2, and the plates are separated by 1.05 mm with air between them. It stores a charge of 337pC. What is the potential difference across plates of the capacitor.
A 150 g copper bowl contains 220 g of water, both at 20.0ºC. A very hot 300g copper cylinder is dropped into the water, What was the original temperature of the cylinder
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