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A lens forms an erect image of a real object. The image is twice the size of the object and appears to be 40 cm from the lens. Determine the power of the lens in diopters (D).
A constant net force of 75N acts on an object initially at rest as it moves through a parallel distance of 0.60m. What is the final kinetic energy of the object
A baseball (m = 148 g) approaches a bat horizontally at a speed of 41.5 m/s (93 mi/h) and is hit straight back at a speed of 45.9 m/s (103 mi/h).
How strong is the electric field between the plates of a 0.70 microF air-gap capacitor if they are 3.0mm apart and each has a charge of 77 microcoloumbs
A grade school student plans to build a 31-power telescope as a science fair project. She starts with a magnifying glass with a focal length of 4.8cm as the eyepiece
A mass vibrates at the end of a spring with simple harmonic motion. The spring constant is 30 N/m. What is the kinetic energy of the mass when it is at half its amplitude
A 310kg wooden raft floats on a lake. When a 75kg man stands on the raft, it sinks 3.20cm deeper into the water. When he steps off, the raft vibrates for a while.
A Styrofoam box has a surface area of 0.74 m2 and a wall thickness of 2.0 cm. The temperature of the inner surface is 5.0°C, determine the thermal conductivity of the Styrofoam
Calculate the magnitude of the electric field at one corner of a square 1.43
Question on a planet similar to Earth
A certain compact disc player draws a current of 340 mA at 27.0 V. How much power is required to operate the player
At Earth location, the intensity of sunlight is 1.5 kW/m2. by how much would Earth's mass increase in 1 day
An old-fashioned (vinyl) record rotates at a constant rate of 45 rpm. how far does a point on the edge travel
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