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If a mechanical wave has a wavelength of 2.80 meters and its period is 4.5 seconds, at what speed does the wave travel?
A 330-power compound microscope has a 4.9mm focal-length objective lens. If the distance from eyepiece to objective is 12cm, what should be the focal length of the eyepiece
Consider a hoop of mass 2.1 kg and radius 0.57 m that rolls without slipping down an incline. What forces act on the hoop
A 5.00 kg box is pulled by a rope with a force of 25.0 N. Determine the acceleration of the boxes
A 75-kg trqampoline artist jumps vertically upward from the top of a platform with a speed of 5.00 m/s. (a) how fast is he going as he lands on the trampoline 3.0m below? (b) If the trampoline behaves like a spring of spring constant 5.2 x 10^4 N/..
On a frictionless, horizontal air track, the glider oscillates at the end of an ideal spring of force constant 2.52N/cm. The graph in the acceleration of the glider as a function of time. Find the mass of the glider.
Electrons in an x-ray tube are accelerated through 105 kV and directed toward a target to produce x-rays. Calculate the power of the electron beam in this tube
Two identical light bulbs are connected in parallel to a different source, one with E=9.0V and internal resistance 0.9 ohms. Find potential difference across each bulb
An aluminum wire carrying a current of 4.0 A has a cross-sectional area of 9.0 10-6 m2. Find the drift speed of the electrons in the wire
Once a traffic light turns green, a car speeds up from rest to 50 mi/h with constant acceleration 9 mi/h • s. In the adjoining bike lane, a cyclist speeds up from rest to 20mi/h with constant acceleration 13mi/h.
In a photoelectric effect experiment, visible radiation of energy 2.68 eV is incident upon a metal of unknown work function. determine the work function of the metal
What is the minimal mass of helium (density 0.18) needed to lift a balloon carrying two people in a basket, if the total mass of people, basket, and balloon (but not gas) is 320.
A ski jumper leaves the ski track moving in the horizontal direction with a speed of 25.0 m/ s. Obtain the velocity when the jumper lands
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