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The distance between an object and its image is fixed at 48 cm. A converging lens of focal length 9.0 cm forms a sharp image for two positions of the lens. What is the distance between these two positions? (cm)
62. A 17.0-kg crate is to be pulled a distance of 20.0 m, requiring1210 J of work to be done. If the job is done by attaching a ropeand pulling with a force of 75.0 N, at what angle is the ropeheld?
q1. a 3.20 box that is several hundred meters above the surface of the earth is suspended from the end of a short
Assuming that this conversion is 100% efficient, what is the length of one side of a square sound collector that is needed to provide thermal energy at a rate of 480W ?
A hydrogen atom at rest in the laboratory emits the Paschen ? radiation. Compute the recoil kinetic energy of the atom
Two gases are in two separate chambers. The gas in one of the chambers has a temperature of 75 degrees Celsius. Which of the gases has more kinetic energy
What is the de Broglie wavelength of a neutron that has fallen 0.80m in a vacuum chamber, starting from rest
A place kicker should kick a football from a point 34 m (about 37 yd) from the goal, and the ball should clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground by a speed of 26 m/s at an angle of 45 degrees to the horizonta..
A 20.0-g piece of Styrofoam carries a net charge of -0.648 µC and is suspended in equilibrium above the center of a large, What is the charge per unit area on the plastic sheet
A projectile is fired with an initial speed of 61.7m/s at an angle of 31.9^\circ above the horizontal on a long flat firing range. Determine the total horizontal distance covered
my kids came up with a form of tether ball where they attached a ball to a string and let it swing around the role.
Consider an equilibrium situation in which three forces act on an object but the total force is zero. What can be said about these forces?Pick all that apply.1. All forces must have the same magnitude.2. All forces must have different magnitude.
A 7hp (shaft) pump is used to raise water to an elevation of 15m. If the mechanical efficiency of the pump is 82% determine the max volume flow rate.
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