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A firehose 17 m long is uncoiled bypulling the nozzle end horizontally along a frictionless surface atthe steady speed of 2.4 m/s. The mass of 1 m of thehose is 0.25 kg. How much work has been done on the hose bythe applied force when the entire hose is moving?
Your taking a trip to a mysterious island where the temperature this time of year is usually about 230k. What is the temperature on the Fahrenheit scale
We are going to fire a laser at a position of one meter to the left of the left of the bottom right corner of the a box. Assume the sides of the box to be perfect mirrors. How long did the light take to leave and return
A proton and an electron are fixed in space with a separation of 957 nm. Calculate the electric potential at the midpoint between the two particles. Find the magnitude and direction of the electric field at the same point.
Light of intensity 0.5 W/m2 passes through the pupil of one of your eyes and eventually falls on your retina. how much light energy passes through in one minute
An arrow is launched from a height of 1.21 m above the ground with an initial velocity of 48.3 m/s, What will be the maximum height the arrow will reach during its trajectory
A 3kg mass is positioned at (0, 8), and a 1 kg mass ispositioned at (12, 0). What are the coordinates of a 4 kg mass thatwill result in the center of mass of the system of three massesbeing located at the origin, (0, 0 )?
In general, for a concave mirror with a focal length +f, how far should an object be placed from the mirror to form a real image which is neither enlarged nor reduced(enter your answer as a multiple of f)?
Start from the expression of the electric filed outside an infinite sheet of uniform surface charge density, E=sigma/2epsilon, derive the electric field
A long, thin rod (length = 4.0m) lies along the x axis, with its midpoint at the origin. In a vacuum, a +8.0 μC point charge isfixed to one end of the rod, and a -8.0 μC point charge isfixed to the other end.
Your friend's car has broken down, and you volunteer to push it to the nearest repair shop, If the mass of your friend's car is 1050 kg, what is the normal force between the two bumpers
A motorist drives north for 35 minutes at 85 km/h and then stops for 15.0 minutes. He then continues north, traveling an additional 130 km in 2 h.
Samantha pushes a 50.0 N crate up a ramp 25.0 m in length and inclined at 10.0 degrees with the horizontal. What potential energy does the crate experience
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