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Questions in physics

[Answered] Which characteristic is used to measure the amount of light radiated by a star? A. size B. color C. luminosity D. temperature

[Answered] Which uses electromagnetic radiation to discover the properties and composition of bodies in space? A. space probe B. space station C. space shuttle D. space observatory

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

[Answered] If a thermometer indicates 40 degrees Celsius, what's the temperature in degrees Fahrenheit? A) 54°F B) 104°F

[Answered] Which characteristic is used to measure the amount of light radiated by a star? A. size B. color C. luminosity D. temperature

[Answered] A sled is at rest at the top of a slope 2 m high. The sled has a mass of 45 kg. What is the sled's potential energy? (Formula: [tex]PE=mgh[/tex]) A. 90 J B. 56.8 J C. 441 J D. 882 J

[Answered] The force, [tex]$F$[/tex], between two objects is inversely proportional to the square of the distance between them. The distance between two objects is increased by [tex]$50 \%$[/tex]. Calculate the percent reduction in the force between the objects.

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

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

[Answered] You are using the volume displacement method to measure the volume of a sphere. You have obtained the following: Initial volume of water - 500 ml Final volume of water - 835 ml What is the volume of the sphere in liters? (Use the correct unit abbreviation in your answer)