If the relative mass of a hydrogen atom is 1/4 that of a helium atom, how many hydrogen atoms would you need to equal the mass of four helium atoms?
A) 16
B) 4
C) 1/4
D) 25
E) 6.022 × 1023
Answer: A
You might also like to view...
Gravitational Force: Three identical 50-kg balls are held at the corners of an equilateral triangle, 30 cm on each side. If one of the balls is released, what is the magnitude of its initial acceleration if the only forces acting on it are the gravitational forces due to the other two masses? (G = 6.67 × 10-11 N ? m2/kg2)
A. 3.7 × 10-8 m/s2 B. 2.5 × 10-8 m/s2 C. 1.9 × 10-8 m/s2 D. 4.2 × 10-8 m/s2 E. 6.4 × 10-8 m/s2
The impulse experienced by a body is equivalent to its change in:
a. velocity. c. momentum. b. kinetic energy. d. None of the other choices are valid.
When a fixed amount of ideal gas goes through an isochoric process
A) its internal (thermal) energy does not change. B) the gas does no work. C) no heat enters or leaves the gas. D) its temperature must increase. E) its pressure must increase.
A transiting extrasolar planet is observed to block 1% of its host star's light. How does the size of this planet compare to the host star?
A) The planet's radius is 10% of the host star's radius. B) The planet is the same size as the host star. C) The planet's radius is 0.1% of the host star's radius. D) The planet's radius is 1% of the host star's radius.