According to the de Broglie hypothesis, which of the following statements is applicable to the wavelength of a moving particle?
a. directly proportional to its momentum
b. inversely proportional to its energy
c. inversely proportional to its momentum
d. directly proportional to its energy
C
You might also like to view...
Purified water, flowing at the rate of 45 kg/h is to be heated from 25°C to 75°C in a food processing plant before it is mixed with thickened tomato puree for sauce production. A thin-walled, 1.25 cm diameter, stainless steel tube is used, which is maintained at a constant surface temperature of 175°C by immersing it in a hot mineral bath. Calculate the length of tubing required and determine whether the forced convection inside the tube is fully developed or has entrance effects. Also, what is the frictional loss?
GIVEN • Diameter of steel tube (Di)= 1.25 cm = 0.0125 m • Cooling water inlet temperature (Tin)= 250C • Cooling water flow rate ( m• )=45 kg/h=0.0125 kg/h • Water outlet temperature (Tout)= 750C • Surface temperature(Ts)=1750C FIND (a) Length of tubing required. (b) whether the forced convection inside tube is fully developed or has entrance effects PROPERTIES AND CONSTANTS Density (?) = 988.1 kg/m3 Specific heat (cp) = 4178 J/(kg K) Thermal conductivity (k) = 0.647 W/(m K) Absolute viscosity (?) = 555.1 × 10–6 (Ns)/m2 Prandtl Number (Pr) = 3.55
Which of the following lists the planets of our solar system in the correct order from closest to farthest from the Sun?
A) Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune B) Mercury, Earth, Venus, Mars, Jupiter, Saturn, Neptune, Uranus C) Mercury, Venus, Mars, Earth, Saturn, Jupiter, Neptune, Uranus D) Earth, Mars, Mercury, Venus, Jupiter, Saturn, Uranus, Neptune
The average rate of erosion on the Moon is far less than on Earth because
A) the crust of the Moon is much denser than the Earth's crust. B) the Moon is much younger than the Earth. C) the Moon lacks wind, water and an atmosphere. D) the Moon's magnetic field protects it from the solar wind better than ours does. E) the Moon's mare long ago dried up, so there is no more wave erosion there.
The fundamental time unit representing a major change in life forms is the
A) eon subdivision. B) era subdivision. C) period subdivision. D) epoch subdivision.