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A relaxed biceps muscle requires a force of 25.3 Newton for an elongation of 3 centimeter; the same muscle under maximum tension requires a force of 550 Newton for the same elongation. Compute Young modulus for the muscle tissue under each of these conditions if the muscle is assumed to be a uniform cylinder with length 0.200 meter and cross-sectional area 46.5 cm2.
a what equal positive charges in coulombs would have to be placed on two celestial objects with masses 7.18 x 1026 and
When light of wavelength 300 nm falls on a cobalt surface, electrons are emitted that have a maximum kinetic energy of 0.240eV. Compute The cut off wavelength, The work function of cobalt,
The nucleus of the hydrogen atom has a radius of about 1.1x10^-15 The electron is at a distance of about 5.29 Ã- 10-11 m from the nucleus. compute the volume of the atom
at the science olympiad competition a group of middle school students uses a trebuchet that launches a tennis ball from
A proton is released from rest, accelerate from one point to another and gain kinetic energy because there is a potential dissimilarity of 1.5μV between the two points, to acquire the same amount of kinetic energy, during what height would the proton..
The drawing shows three materials, a, b, and c. A ray of light strikes the a–b interface at an angle that now hardly exceeds its critical angle of 40.0°. The reflected ray then strikes the a–c interface at an angle of incidence that now barely exceed..
A positive point charge with a mass of 0.43 kg is placed on a string and hangs vertically. Another negative point charge is placed directly beneath this charge a distance of d. Due to its weight and the electric force, the tension in the string is 22..
A rocket of mass 4.5105 kg is in flight. Its thrust is directed at anangle of 50.5° above the horizontaland has a magnitude of 6.30 106 N. Find the magnitude and direction of the rockets acceleration. Give the direction as an angle above thehorizo..
The pressure inside a bottle of champagne is 4.5 atm higher thanthe air pressure outside. What is the frictional force on the cork due to the neck of the bottle
A spaceship is moving around the Earth in a 500- x 1000km orbit. At apogee, a retrorocket is fired in a direction exactly opposite to the spaceship's velocity vector. How much time elapsed between retrofire and impact
The National Museum of Photography, Film & Television, in England, has a huge converging lens with a diameter of 1.37 m and a focal length of 8.45 m. What is the image magnification
A 2.5 kg object is attached to a horizontal spring of force constant k = 4.1 kN/m. The spring is stretched 10 cm from equilibrium and released. Find the maximum acceleration
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