An ordinary glass lens forms an image by ____________ of light
a. reflection
b. refraction
c. diffraction
b
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Coherent sources of light have a varying phase difference
Indicate whether the statement is true or false
A satellite is in a circular parking orbit 6.98 × 106 m from the center of Earth. To initiate a Hohmann transfer, a rocket gives it an accelerating thrust so that its speed is increased to 8300 m/s
How far from the center of Earth will the satellite be when it reaches its apogee? The mass of Earth is 5.97 × 1024 kg and G = 6.67 x 10-11 N•m2/kg2. A) 3.12 × 107 m B) 2.48 × 107 m C) 1.06 × 107 m D) 6.73 × 107 m E) 4.75 × 107 m
Using a digital balance the mass of a certain piece of wood is read as 12.946 g. Thinking in terms of accuracy and significant figures, what value would you record on your data sheet if the balance is accurate to one-tenth of a gram?
A) 12.9 g B) 12.95 g C) 13 g D) 13.0 g
Given that the planet orbiting the nearby star 51 Pegasi is about 20X larger than the Earth, but 400X more massive, on that world you would weigh
A) the same as you do here. B) twice as much as you do here. C) half as much as you do here. D) 20X more that you do here. E) 400X more than you do here.