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A girl consumes 8.4 x 106 (2000 food calories) of energy per day whole maintaining a constant weight. Compute the average power she produces in a day?
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Question: A projectile is launched at an angle of 30 deg.Is there any point on the trajectory where V and A are parallel to each other? Is there any point where V and A are perpendicular to each other? The response must ...
Question: A point source of light illuminates an aperture 2.00 away. A 14.0 -wide bright patch of light appears on a screen 1.00 behind the aperture. How wide is the aperture (in cm)? The response must be typed, single s ...
Question: Part A: At what angle θ1 to the normal would the first dark ring be observed? Part B: Suppose that the light from the pinhole projects onto a screen 3 meters away. What is the radius of the first dark ring on ...
Question: Oxygen gas (O2) has a molar mass of about 32.0 g/mol, and hydrogen gas (H2) has a molar mass of about 2.00g/mol. Calculate (a) the rms speed of an oxygen molecule when the temperature is 300 K, and (b) the rms ...
Question: The radius of the earth's very nearly circular orbit around the sun is 1.5x10^11m. Find the magnitude of the earth's velocity as it travels around the sun. Assume a year of 365 days. Find the magnitude of the e ...
Question: A researcher observes hydrogen emitting photons of energy 1.13eV . What are the quantum numbers of the two states involved in the transition that emits these photons? Express your answers as integers separated ...
Question: The position of a mass oscillating on a spring is given by x = (6.6cm) cos[2Ït/(0.69s)]. Part A: What is the frequency of this motion? Express your answer using two significant figures. Part B: When is the mas ...
The first modern Olympics of 1896 had a marathon distance of 40 km. In 1908, for the Olympic marathon in London, the length was set at 42.195 km to provide the Royal Family with a better view of the race. Other distances ...
Question: A ring with radius R and a uniformly distributed total charge Q lies in the xy plane, centered at the origin. Part A: What is the potential V(z) due to the ring on the z axis as a function of z? Express your an ...
Question: A certain brand of freezer is advertised to use 880 kW*h of energy per year. A) Assuming the freezer operates for 6 hours each day, how much power does it require while operating? B) If the freezer keeps its in ...
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