The wavelength of a 45-kg teenager moving at 5 m/s on a skateboard is about
a. 5 × 10^-37 m.
b. 3 × 10^-36 m.
c. 7 × 10^-34 m.
d. 0.1 m.
e. 5 m.
B
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A proton with mass 1.67 × 10^-27 kg moves with a speed of 0.800c in an accelerator. What is its relativistic momentum? (c = 3.00 × 10^8 m/s)
a. 2.40 × 10^-19 kg×m/s c. 0.530 × 10^-19 kg×m/s b. 6.68 × 10^-19 kg×m/s d. 3.76 × 10^-19 kg×m/s
About how big is the largest asteroid known in the Solar System?
A. about 50 feet B. about one-quarter the size of the Moon C. about the size of Earth D. about 50 miles E. about 50 yards
Shear Modulus: The base of a metal block, which is fixed in place, measures 90 cm by 90 cm, and the height of the block is 60 cm. A force, applied to the upper face and parallel to it, produces a shear strain of 0.0060. The shear modulus of this metal is 3.0 × 1010 Pa. The shear stress on the block in megapascals is closest to
A. 180 MPa. B. 360 MPa. C. 600 MPa. D. 720 MPa. E. 900 MPa.
If a lunar astronaut wanted to know the quantity of matter in a moon rock that he had collected would he want to know its mass or weight?Explain.
What will be an ideal response?