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Suppose that Eratosthenos had measured an angle of 6 degrees difference between the sun's rays at Alexandria and those at Seyene. What value would be obtained for the Earth's circumference and radius? Assume that the distance between Alexandria and Seyene is equal to 800 km.
Transmission electron microscopes that use high-energy electrons are employed in many areas including the study of biology samples (like a virus) and nanoscience research and development (allow particles and carbon nanotubes, for example).
Consider the Earth and a cloud layer 600 m above the planet to be the plates of a parallel-plate capacitor. what is the maximum charge the cloud can hold
The force of gravity acting on the arm acts through point A. Identify the magnitudes of the tension force t in the deltoid muscle and the force s of the shoulder on the humerus (upper-arm bone) to hold the arm in the position shown.
To separate two pieces of paper whose area is 10 cm by 10 cm, you blow across them with an air speed of 2.40 m/s. What is the resulting force on each
You are trying to overhear a juicy conversation, but from your distance of 15m. It sounds like only an average whisper of 20 dB. So you decide to move closer to give the conversation a sound level of 60 dB instead. How close must you come.
Deflection of the electron beam in a tube TV set is accomplished by magnetic forces. how far from the center of the screen does the beam strike
A particle has a rest mass of 6.60 x 10-27 kg and a momentum of 2.16 x 10-18 kg • m/s. What is the total energy (kinetic plus rest energy) of the particle
Two 4.0 X 4.0 square aluminum electrodes, spaced 0.80 apart are connected to a 100battery. What is the charge on the positive electrode
A 4.40 kg block is pushed along a floor by a constant applied force that is horizontal and has a magnitude of 40.0 N. it gives the block's speed v versus time t as the block moves along an x axis on the floor. The scale of its vertical axis is set by..
There are two light bulbs in a circuit, powered by one battery. One light bulb is a 100 watt light bulb and the other a 200 watt light bulb. How much power must the battery be supplying for the lights to be running at full power?
Short pulses of laser light traveling in the x-direction with a diameter of 1 mm are incident on a perfect mirror. The pulses are 10^-13 seconds long and have a repetition rate of 10 Hz, each with an energy of 1 mJ.
In deep space, sphere A of mass 120 kg is located at the origin of an x axis and sphere B of mass 130 kgis located on the axis at x = 5.8 m. Sphere B is released from rest while sphere A is held at the origin. What is the gravitational potential ener..
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