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A 0.20 kg block rests on a frictionless level surface and is attached to a horizontally aligned spring with a spring constant of 40 N/m. The block is initially displaced 4 cm from the equilibrium point and then released to set up a simple harmonic motion. What is the frequency?
how long does it take for a person to radiate. Calculate the time of flight.
A uniform cubical crate of side length 1.7 m rests on the floor with one edge against a very small, fixed obstruction. What is the weight of the crate
A group of students determined that the following points were upon the best fit line for a graph of W2 vs. Determine the total mass of the system
A UFO streaks across the sky at a speed of 0.90c relative to the earth. What length does the person measure for the UFO when it lands
q1. a 7.40-nc charge is positioned 1.70 m from a 4.80-nc charge. a find the magnitude of electrostatic force that one
If you hold a horizontal metal bar several centimeters above the ground and move it through grass, each leaf of grass bends out of the way. How can it exert enough force on a leaf of grass to shear it off
As observed from Earth, the wavelength of Hβ in the spectrum of the star Megrez in the Big Dipper is 486.112 nm. Laboratory measurements demonstrate that the normal wavelength of this spectral line is 486.133 nm. Is the star coming toward us or mo..
A 12.00 box resting on a horizontal, frictionless surface is attached to a 5 weight by a thin, light wire that passes without slippage over a frictionless pulley. The pulley has the shape of a uniform solid disk of mass 2.5 and diameter 0.560.
You go to a gym and lift a 245-kg mass 2.13 m over the ground? You hold it for 10 seconds. How much work you did during the holding period
Insects do not have lungs as we do, nor do they breathe through their mouths. Instead, they have a system of tiny tubes, called tracheae, find the oxygen concentration at the interior end of the tube
A flask is filled with 1.58 L (L = liter) of a liquid at 100 °C. When the liquid is cooled to 13.3 °C, What is the coefficient of volume expansion of the liquid
What is the electric potential at the surface of a gold atom’s nucleus, which is assumed to be spherical? The radius of a gold nucleus is 6.6*10^-15 meters and the atomic number of gold is 79.
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