What is the maximum acceleration of the needle
A sewing machine needle moves up and down in simple harmonic motion with an amplitude of 1.27 cm and a frequency of 2.55 Hz. What is the maximum acceleration of the needle?
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How fast will each be moving when they collide? (Hint: Consider conservation of energy and of linear momentum.)
A 1050 kg car carrying four 78 kg people travels over a rough "washboard" dirt road with corrugations 4.0 m apart which causes the car to bounce on its spring suspension. The car bounces with maximum amplitude when its speed is 15 km/h. The car n
What is meant by the wave function of a particle? A beam of electrons passes through a single slit and a beam of protons passes through a second, but identical slit. If the electrons and protons have the same speed, which beam will experience the g
What energy transfers take place during the hydrologic cycle? i keep getting different answers. Conduction, convection, radiation as well as latent heat of fusion and latent heat of vaporization.
A person who walks for exercise produces the position-time graph shown. Calculate the average velocity, including sign, for (a) segment A, (b) segment B, (c) segment C, and (d) segment D
Niels Bohr, a Danish physicist applied Planck"s ideas, and realised that the energy levels were quantised. Is there any proof for Bohr"s ideas and what does de Broglie have to do with it all?
A block of mass m is suspended from a string a height h above the ground. The string is wrapped around a disk shaped pulley with mass m and radius R. Find the tension T in the string. (Your answer should be in terms of variables). Rotational energ
A Fed Ex worker pulls a box of mass 20 kg with a force of 120 N at an 11 degree angle with respect to the floor (a) Ignoring friction, what is the acceleration of the box?
The work done by friction on the rock when it moves from point A to point B at the bottom of the bowl is -0.22 J. What is the speed of the rock when it reached point B?
A 2.30-kg object attached to a spring moves without friction (b = 0) and is driven by an external force given by the expression F = 3.40sin(2pi*t), where F is in newtons and t is in seconds. The force constant of the spring is 35.0 N/m. (a) Find t
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