A marble has a radius of 16 mm. Approximately how many marbles will fit in a cube-shaped container with each side equal to 36 cm?
a. 20
b. 510
c. 1 420
d. 80
c
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Which of the following statements is true of Jupiter's interior?
A) High pressure creates a sudden boundary between liquid and gas. B) It is four times colder than the Sun's surface. C) The rocky core at Jupiter's center contains light-weight elements. D) It is composed of a material that is a very good conductor of electricity.
X-rays are ________ waves of ________ wavelength.
What will be an ideal response?
Suppose a uniform electric field of 4 N/C is in the positive x direction. When a charge is placed at and fixed to the origin, the resulting electric field on the x axis at x = 2 m becomes zero. What is the magnitude of the electric field at x = 4 m on the x axis at this time?
a. 0 b. 1 N/C c. 2 N/C d. 4 N/C e. More information is needed to find the resulting field magnitude at this position.
Sound waves of a certain frequency in air having a wavelength of 1.9 m will have what wavelength in water? Take the speed of sound in air to be 340 m/s and in water to be 1490 m/s
a. 0.57 m c. 8.3 m b. 1.9 m d. 11 m