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An object is 24 cm in front of a diverging lens that has a focal length of -17 cm. How far in front of the lens must the object be placed so that the size of its image is reduced by a factor of2.2?
The front 1.20 m of a 1,350-kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. What is the magnitude of the average force on the car
A 5kg box slides up a 10 m long frictionless incline at an angle of30* with the horizontal pushed by a 40-N force parallel to theincline. Find the change in kinetic energy of the box.
A ball of mass 0.3 kg at the end of a rigid rod is undergoing circular motion in a circle of radius 0.5 m. Find the angular speed as a function of time
Suppose the solar insolation is 850 W/m2 and you can collect 20% of the energy that fall on the surface of a solar hot dog cooker. If you need 240 W to cook a hot dog, what is the minimum area required?
a 0.5 kg block of aluminum is heated to 200 degrees C. The block is then quickly placed in an air insulated tub of cold water at 0 degrees C and sealed. compute the final temperature of the water and block
Compute the force of tension or compression
Levitation by Light Pressure. Consider an isolated hydrogen atom of mass 1.66 x10^- 27 kg. Find the number of photons that must strike the atom per second, and the corresponding and optical power, for it not to fall under the effect of gravity, gi..
4m, 32 degrees east of north 57.3m, 36 degrees south of west 17.8m, straight south. calculate the resultant displacement vector
You are standing in the middle of the recreation room of anuclear submarine that is lurking in the Arctic Ocean at themagnetic south pole of the earth, where the magnetic field linespoint straight down toward the ocean floor, in the negativez dire..
A flat uniform circular disk (r= 2.00m, m=1.00*102kg) is initally stationary. Find the resulting angular speed of the disk (in rad/s) and describe thedirection of rotation
It has been claimed that an insect called the froghopper (Philaenus spumarius) is the best jumper in the animal kingdom, What is the velocity of the insect after it has accelerated through this short distance
Determine the highest speed the stone can attain without breaking the string.
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