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Questions in physics

[Free] Which one of the following quantities has a correct unit? | Quantity | Unit | |---|---| | A speed | km⋅h⁻¹ | | B wavelength | Hz | | C mechanical energy | J⋅s⁻¹ | | D resistance | A |

[Free] A bicycle has a momentum of $36 kg \cdot m / s$ and a velocity of $4 m / s$. What is the mass of the bicycle?

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

[Free] You turn on a car's radio. What energy transformation is taking place? A. Nuclear to sound B. Chemical to kinetic C. Thermal to kinetic D. Electrical to sound

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

[Free] The amount of kinetic energy an object has depends on which feature of the object? A. its motion B. its position C. its gravity

[Free] A satellite is orbiting the Earth in such a manner that the satellite is always straight above India and is at a height of 36000 km. Which of the following is true? (A) Its period of rotation is 24 hours (B) Its period of revolution is 24 hours (C) Its period of rotation is 36 hours (D) Its period of revolution is 36 hours

[Free] Hint: Density of water $=62.4 lb / ft ^3$. $W=[?] ft-lb$ Round your answer to the nearest whole number.

[Free] Select the correct answer. Object A attracts object B with a gravitational force of 10 newtons from a given distance. If the distance between the two objects is doubled, what is the new force of attraction between them? A. 2.5 newtons B. 5 newtons C. 20 newtons D. 100 newtons

[Free] The momentum of a system before a collision is [tex]$2.4 \times 10^3 kilogram$[/tex] meters/second in the [tex]$x$[/tex]-direction and [tex]$3.5 \times 10^3 kilogram$[/tex] meters/second in the [tex]$y$[/tex] direction. What is the magnitude of the resultant momentum after the collision if the collision is inelastic? A. [tex]$1.7 \times 10^3$[/tex] kilogram meters/second B. [tex]$2.1 \times 10^3$[/tex] kilogram meters/second C. [tex]$3.4 \times 10^3$[/tex] kilogram meters/second D. [tex]$4.2 \times 10^3 kilogram$[/tex] meters/second E. [tex]$5.7 \times 10^3$[/tex] kilogram meters/second