If you carry a heavy bag of groceries and bang your hand against the wall, the concept that best explains why your hand hurts is

A) inertia.
B) gravity.
C) resistance.
D) none of the above


Answer: A

Physics & Space Science

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Density: A plastic block of dimensions 2.00 cm × 3.00 cm × 4.00 cm has a mass of 30.0 g. What is its density?

A. 0.80 g/cm3 B. 1.20 g/cm3 C. 1.25 g/cm3 D. 1.60 g/cm3

Physics & Space Science

A car travels in an oval path as shown below. = 25 m/s, West, and   = 20 m/s, North. The ratio of the magnitude of the centripetal acceleration at B to that at A,

src="https://sciemce.com/media/2/ppg__cognero__Chapter_4_Two_and_Three_Dimensional_Motion.__media__e90dd87f-71ff-4090-9310-9f96000636e3.PNG" style="vertical-align:-22px;" width="28px" height="55px" />, is: ? ? A. 0.512 B. 0.64 C. 0.8 D. 1.25 E. 1.56

Physics & Space Science

A 3.0-cm tall statue is 48 cm in front of a convex lens having a focal length of magnitude 20 cm

(a) Is the image of the statue real or virtual? (b) How far is the image from the lens? (c) Is the image upright or inverted? (d) How tall is the image?

Physics & Space Science

Consider the four quantum numbers of an electron in an atom, n, l, ml, and ms. The energy of an electron in an isolated atom depends on

A) l, ml, and ms only. B) n only. C) n and l only. D) n, l, and ml only. E) all four quantum numbers.

Physics & Space Science