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A rock is dropped from a height of 100 m above the ground. One second later a ball is thrown down vertically from same height with initial velocity 13.0 m/s. How long after the ball is thrown will the objects be at the same height above the ground.
A crate of mass 9.0 kg is pulled up a rough incline with an initial speed of 1.42 m/s. What is the change in kinetic energy of the crate
The waves from a radio station can reach a home receiver by two paths. One is a straight-line path from transmitter to home, a distance of 22.0 km. Find the minimum height of the ionospheric layer
An aluminum clock pendulum having a period of 1.80 s keeps perfect time at 20.0°C. How much time will it gain or lose every hour
A microscope has an objective lens of focal length 6.55 mm. The objective forms an image 16.2 cm from the lens. What is the distance between the lenses
A disk of radius R has a uniform surface charge σ on one side. A circular hole of radius R/2 is now cut in the center of the disk. What is the electric field at the center of the hole
A submarine suddenly breaks up at a depth of 248 m below sea level. The air in the submarine will then be suddenly (adiabatically) compressed. The initial pressure of the air is 1.0 atm, and the initial temperature is 23.0°C.
Positively charged aluminum ion, Al3+, has a mass of 4:50 1026 kg. After being accelerated through a potential dierence of 650 V, Calculate the radius of the path of the ion in the eld
A woman at an airport is towing her 15.0-kg suitcase at constant speed by pulling on a strap at an angle ? above the horizontal. What angle does the strap make with the horizontal
What is the largest wavelength that will give constructive interference at an observation point 171 from one source and 295 from the other source.
A uniform electric field of magnitude 395 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 3.00 cm. (a) What is the work done by the field on the electron? J (b) What is the change in..
In a circus an elderly performer thrills the crowd by catching a canon ball shot at him. what is his recoil velocity
Consider an electron constrained to travel in a one-dimensional box of length L. What is the length L of the one-dimensional box
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