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Questions in physics

[Done] Which one of these is true about motion? (A) Motion is relative (B) Motion is not relative (C) Something is not in motion if its position respect to the observer changes with time (D) Both (A) and (B)

[Done] The two cars are moving in the same direction. The speeds of both cars are 100 km/hr and 118 km/hr. Find the relative speed (in m/sec) of the two cars with respect to each other. (a) 5 m/sec. (b) 10 m/sec. (c) 7 m/sec. (d) 12 m/sec.

[Done] Select the correct answer. A wave oscillates 50 times per second. What is its frequency? A. 25 hertz B. 50 hertz C. [tex]$5.0 \times 10^2$[/tex] hertz D. [tex]$2.0 \times 10^{-2}$[/tex] hertz

[Done] Which statement is true according to Newton's second law of motion? A. An object accelerates in the direction opposite to the direction of the force applied. B. An object accelerates in the direction perpendicular to the direction of the force applied. C. An object accelerates in the same direction as that of the force applied. D. An object undergoes no acceleration on the application of force. E. An object's acceleration is independent to the force applied.

[Done] The information in the table represents the effect of the mass of two objects on the gravitational force between the two objects. Mass of Object 1 (kg) Mass of Object 2 (kg) Distance between Objects 1 and 2 (m) Gravitational Force between Objects 1 and 2 (N) 1 1 1 4 2 1 1 ? Which number should be in the cell with the question mark? A. The number is two because when you double the mass of one of the objects, the force between the objects is halved. B. The number is four because when you double the mass of one of the objects, the torce between the objects remains the same. C. The number is eight because when you double the mass of one of the objects, the force between the objects also doubles. D. The number is sixteen because when you double the mass of one of the objects, the force between the objects increases by a factor of 4.

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

[Done] Consider a velocity versus-time graph (v(t)). Is free fall a form of uniform motion or uniform accelerating motion? Why so? A stone is released from height h. Assuming that the gravitational acceleration is g.

[Done] Does gas keep its shape like a solid? Can you pour gas like a liquid?

[Done] Find the odd one out: Fuse wire, bad conductor, rubber gloves, generator. Complete the correlation.

[Done] An archer released a 100 g arrow at a velocity of 20 m/sec. It hits its target having a mass of 600 g. With the arrow embedded in the target, with what velocity does the target move?