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At a playground, a 20.2 kilogram child plays on a slide that drops through a height of 2.19 meter. The child starts at rest at the top of the slide. On the way down, the slide does a non conservative work of -319 Joule on the child. Determine the child speed at the bottom of the slide?
A microwave oven generates electromagnectic waves of frequency2.45 GHz. The microwaves enter the oven and are reflected by the walls. Calculate the speed of the micro waves from these data
A puck goes around its circular path once every 1.6 second. Its speed is 33 cm/s. Evaluate what is the radius of its circular path
An object, at the top of a very tall building, is released from rest and falls freely due to gravity. Neglect air resistance and compute distance covered by the object between times t1 = 5.5 s and t2 = 7.9 s after it is released.
A block of mass M=100 kg is moving down an incline that makes an angle of 30 degrees relative to the horizontal. How much work is done by friction during this process
Pablo and Juna carry a load weighting 720 Newton on a pole between them. calculate what force does each person support
Light of vacuum wavelength 632.800 nm, emitted with a stabilized He-Ne laser, is reflected at normal incidence by the oil. How many wavelengths are contained in the light wave passing back and forth during the oil?
Although they don’t have mass, photons—traveling at the speed of light—have momentum. Space travel experts have thought of capitalizing on this fact by constructing solar sails—large sheets of material that would work by reflecting photons
An AC source operating at 60 Hz with a maximum voltage of169 V is connected in series with aresistor (R = 1.4 k) and acapacitor (C = 2.5 µF). What is the maximum value of the current in the circuit? What are the maximum values of the potential diff..
When venturing forth on Planet X, you throw a 5.01 kg rock upward at 12.6 m/s, What does the rock weigh on planet X
Three flat layers of transparent material are stacked upon one another. The top layer has index of refraction n1, the middle has n2 and the bottom one has n3. If n1
At what temperature is the speed of sound in helium (ideal gas, = 1.67, atomic mass = 4.003 u) the same as its speed in oxygen gas at 4.78 oC
A rock is thrown from 50.0-m-high cliff with an initial velocity of 70 m/s at an angle of 53.0 degrees above the horizontal. Find the velocity vector for when it hits the ground below
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