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Length of flame of a light is 3 cm. It is 3m away from a wall . From what distance from the wall we can place a concave mirror so that it gets 3 times magnified? And what is the focal length of the mirror?
An intergalactic rock star bangs his drum every 1.52 s. A person on earth measures that time between beats is 2.10 s. How fast is the rock star moving relative to the earth.
a ball is thrown upwards with an initial velocity of 10 ms. find the time for its maximum height and also find its
What is the size of the static friction force on the cabinet when the bed is tilted at 20o? At what angle will the file cabinet begin to slide if the coefficient of static friction of steel on steel is Ms= 0.80 and the coefficient of kinetic frict..
A system consists of two particles. Particle 1 with mass 2.0 kg is located at (2.0 m, 6.0 m) and has a velocity of (2.6 m/s, 4.1 m/s). find the position and the velocity of the center of mass of the system
A hydraulic lift is used to jack a 920 kg car 42 cm off the floor. The diameter of the output piston is 18 cm, and the input force is 350 N. What is the area of the input piston
At which angle will the photon scatter with respect to its original direction? (The accepted unit abbreviations for angles are either 'deg' for degrees or 'rad' for radians.)
If the distance between the first and tenth maxima of a double slit pattern is 4.2mm and the slits are separated by 0.15mm with the screen 90cm from the slits,what is the wavelength of the used?
The body contains many small currents caused by the motion of ions in the organs and cells. how large is the current in the heart
A truck traveling at 60 mi/h brakes to a stop in 180 ft. What was the stopping time
Two 5000 kg passenger cars roll without friction (one at 1 m/s, the other at 2 m/s) toward one another on a level track. They collide, couple, and roll away together with the combined momentum.
A steel bicycle wheel (without the rubber tire) is rotating freely with an angular speed of 16.4 rad/s. What is the angular speed of the wheel
A uniform cylinder whose mass is 50 kg and radius is 0.20 m is mounted so that it turns without friction on its axis, which is fixed. What is the magnitude of the torque acting on the cylinder
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