What buoyant force is exerted by water on a 0.60-kg solid gold crown when it is immersed in water? The density of gold is 19.3 × 103 kg/m3 and that of water is 1000 kg/m3
A) 3.0 × 10-5 N
B) 3.0 × 10-4 N
C) 3.0 × 10-2 N
D) 0.30 N
D
You might also like to view...
When charging a battery, the terminal voltage is ________ the battery emf
A) less than B) zero, as is C) equal to D) more than
Three essential components of a nuclear reactor are: a fissionable fuel ,a coolant to transfer the heat, and
A) a "scrubber" to prevent radioactive isotopes from getting into the environment. B) a radioactive substance to keep the reaction going. C) tritium to speed up the neutrons. D) control rods. E) lead to stop the neutrons.
A metallic sheet has a large number of parallel slits, 5.0 mm wide and 20 cm apart. This sheet is used as a diffraction grating for microwaves
A wide parallel beam of microwaves is incident normally on the sheet. If the intensity maxima occur 2.0° apart in the central region, what is the wavelength of the microwaves? A) 9.0 mm B) 7.0 mm C) 6.0 mm D) 5.0 mm E) 8.0 mm
A distant galaxy is emitting light from the helium spectrum at 388.9 nm. On Earth the wavelength of the light from this galaxy is measured to be 540.6 nm
Estimate how far from Earth (in light-years) this galaxy is if the Hubble constant has the value 22 km/s per million light-years. (c = 3.00 × 108 m/s, 1 ly = 9.461 × 1015 m, 1 y = 3.156 × 107 s)