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[ Acknowledge ] The following physics responses are provided by a student and, as such, should be considered in that context. While every effort is made for accuracy, absolute correctness cannot be fully guaranteed.
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The distance to the Andromeda Galaxy is estimated at about 2*10^6 light years. A light year is the distance traveled by light in one year; if the speed of light is 3*10^8 m/s, about how far is it from our galaxy to Andromeda? (1 year = 3.15*10^7 s)2*10^22 m
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The information on a one-gallon paint can is that the coverage, when properly applied, is 450 ft2. One gallon is 231 in3. What is the average thickness of the paint in such an application?0.0036 in
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The length and width of a standard sheet of paper is measured, and then the area is found by calculation to be 93.50 in2. The number of significant figures in the width measurement must be at least:4
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The mass of the sun is 2.0*10^30 kg, and the mass of a hydrogen atom is 1.67*10^-27 kg. If we assume that the sun is mostly composed of hydrogen, how many atoms are there in the sun?1.2*10^57 atoms
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The nuclei of atoms contain:protons and neutrons.
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The number 0.00017 has how many significant figures?2
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The prefixes which are abbreviated p, n, and G represent which of the following?10^-12, 10^-9, and 10^9
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The proton contains which of the following combination of quarks?two up quarks and one down quark
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The ratio M/m of the prefixes M and m has what value?10^9
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The speed of a boat is often given in knots. If a speed of 5 knots were expressed in the SI system of units, the units would be:m/s
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Water flows into a swimming pool at the rate of 8.0 gal/min. The pool is 16 ft wide, 32 ft long and 8.0 ft deep. How long does it take to fill? (1 U.S. gallon = 231 cubic inches)64 hours
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When NASA was communicating with astronauts on the moon, the time from sending on the Earth to receiving on the moon was 1.28 s. Find the distance from Earth to the moon. (The speed of radio waves is 3.00*10^8 m/s.)384000 km
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When was the existence of the neutron confirmed?1932
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Which expression is dimensionally consistent with an expression that would yield a value for time^-1? (v is velocity, x is distance, and t is time)v/x
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Which formula is dimensionally consistent with an expression yielding a value for velocity? (a is acceleration, x is distance, and t is time)at
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