What do you think is the greatest source of error in this experiment? Justify your answer


The greatest source of error is in determining the times to travel the various distances
because of the number of different students taking measurements and the human
errors made by each due to their reaction times in starting and stopping the clock.

Physics & Space Science

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Why are reflection nebulae blue in color?

What will be an ideal response?

Physics & Space Science

Force on a Moving Charge: A proton is projected with a velocity of 7.0 km/s into a magnetic field of 0.60 T perpendicular to the motion of the proton. What is the magnitude of the magnetic force that acts on the proton? (e = 1.60 × 10-19 C)

A. 0 N B. 3.4 × 10-16 N C. 4.2 × 10-16 N D. 13 × 10-16 N E. 6.7 × 10-16 N

Physics & Space Science

Two spheres are made of wood – the first is of a variety of wood whose density is equal to that of water, while the second is of a variety whose density is greater than that of water. These spheres have the same volume – and the first remains wherever it is placed in the water, so it is effectively suspended m in mid-water. The second rests on the bottom, being more dense than water. Compare the buoyant forces on the two spheres.

A. Nothing specifically can be concluded without knowing exactly the densities of the spheres. B. They are identical C. The force on the second is zero, and therefore less than that on the first, which is non-zero. D. The force on the second is non-zero and is less than that on the first.

Physics & Space Science

A compound microscope has an eyepiece that

a. uses a real image from the objective as the object and forms its own real image. b. uses a real image from the objective as the object and forms a virtual image. c. uses a virtual image from the objective as the object and forms its own real image. d. uses a virtual image from the objective as the object and forms its own virtual image.

Physics & Space Science