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Problem: A 2.75 cm high object is placed 2.5 cm in front of a concave mirror. If the image is 6.0 cm high and virtual, what is the focal length of the mirror?
Please use as much detail as required in your solution. Thanks.
A 150 g mass hangs from a fishing line. If it falls and accelerates at 4.0 m/s^2, what is the tension in the fishing line
A 1.3-kg block of ice is initially at a temperature of -6.0%u2218C. If 3.0*10^5 J of heat are added, what is the final temperature
Compute the temperature at which a tungsten filament that has an emissivity of 0.35 and a surface area of 3.0*10-5 m2 will radiate energy at the rate of 15 W in a room where the temperature is 13°C.
A 723 Newton person stands on a uniform board of weight 282 Newton and length 6.1 meter. Find how far from the left end of the board is the person standing
a closed circuit consists of two semicircles of radii 37 and 20 cm that are connected by straight segments. a current
A 5.0 ice cube at -20 is in a rigid, sealed container from which all the air has been evacuated. How much heat is required to change this ice cube into steam
Imagine holding a really light object on top of a really massive object, and then dropping both of them at the same time onto the ground, how high will the little object bounce
A 5 kg ball and 10 kg ball approach eachother with a speed of 20 m/s. If they collide perfectly inelasticially, the speed of the balls just after the collision is what
At some other time, the velocity consists of only a y component. If the force is unchanged, and the instantaneous power is -11 W, determine what is the velocity of the object just then
A 20.00 kg child is on a swing that hangs from 3 m long chains. What is her maximum speed if she swings out to a 45.0 o angle.
Two identical converging lenses have focal lengths of 15 cm and are aligned on the same principal axis. What is the total magnification of the two lenses
If three 1.1 m fan blades are connected to a motor and accelerated uniformly from rest to 58 rpm in 11 minutes. Determine the angular acceleration of the blades
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