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Questions in physics

[Homework Help] If a cyclist finished a 100 km leg of the Tour de France in 3 hours, what was the cyclist's average velocity? A. 33 m/s B. 3.3 km/h C. 33 km/h D. 100 km/h

[Homework Help] Which force keeps the planets from floating off into space? A. Earth's gravity B. the Sun's gravity C. the moon's gravity D. Milky Way's gravity

[Homework Help] The equation [tex]T^2=A^3[/tex] shows the relationship between a planet's orbital period, [tex]T[/tex], and the planet's mean distance the sun, [tex]A[/tex], in astronomical units, [tex]AU[/tex]. If factor is A. [tex]2^{\frac{1}{3}}[/tex] B. [tex]2^{\frac{1}{2}}[/tex] C. [tex]2^{\frac{2}{3}}[/tex] D. [tex]2^{\frac{3}{2}}[/tex]

[Homework Help] If a car starts from rest and its velocity becomes 30 m/s in 12 seconds, then find the acceleration.

[Homework Help] What is the approximate size of sunspots? A. The size of a baseball field B. The size of a planet C. The size of the Moon D. We have not yet determined their size

[Homework Help] What's one supporting point for using PV cells for solar energy? PV cells contain silicon, which is

[Homework Help] The main difference between heat and temperature is that temperature solely depends on the A) state of matter. B) mass of a body. C) composition of a body. D) velocity of molecules within a body.

[Homework Help] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Homework Help] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Homework Help] Choose the factors from those listed below that would affect circuit characteristics on the human body in the event of electrical shock. I. Current II. Resistance III. Frequency IV. Voltage A. I and II B. I, II, III, and IV C. II and III D. II, III, and IV