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A 2.0 cm tall candle flame is 1.8 cm from a wall. You happen to have a lens with a focal length of 36 cm . 1. How many places can you put the lens to form a well-focused image of the candle flame on the wall?
How to compute for the density of dark matter estimate mass density of dark matter in the solar neighbourhood. Express the answer in units of kg m-3, Msun pc-3, Msun AU-3.
A -kg box is being lifted by means of a light rope that is threaded through a single, light, frictionless pulley that is attached to the ceiling, what average power is delivered by the person pulling on the rope
Two railroad cars, each of mass 7850kg and traveling 85km/h in opposite directions, collide head-on and come to rest. How much thermal energy is produced in this collision
A steel beam 10m long is installed in a structure at 15?C, What is the beam's change in length when the temperature reaches 50?C
A woman with a mass of 55.0kg is standing on the rim of a large disk that is rotating at an angular velocity of 0.470rev/s, Calculate the magnitude of the total angular momentum of the woman-plus-disk system
You have a 1200W microwave. When you put a cup of water in for 8 minutes only half evaporates. How efficient is your microwave
Sunlight is used in a double-slit interference experiment. The fourth-order maximum for the wavelength of 470 nm occurs at an angle of θ = 90°. Thus, it is on the verge of being eliminated from the pattern since θ cannot exceed 90°.
You push with a 20N horizontal force on a 2 kg mass resting on the horizontal surface against a horizontal friction force of 12N. What is the acceleration.
At a certain point in a horizontal pipeline, the water's speed is 4.00{\rm m/s}, Find the gauge pressure at a second point in the line
When a 29.0-V emf device is placed across two resistors in series, a current of 10.0 A is flowing in each of the resistors. compute the magnitude of the larger of the two resistances
The 1994 Winter Olympics included the aerials competition in skiing. In this event skiers speed down a ramp that slopes sharply upward at the end, What is the skier's launch speed
When a 0.213-kg mass is attached to a vertical spring it causes the spring to stretch a distance d. Find the stretch distance, d
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