Chapter 2, Problem 3P

Answer the following. (a) What is the surface temperature of Betelgeuse, a red giant star in the constellation of Orion, which radiates with a peak wavelength of about 970 nm? K(b) Rigel, a bluish-white star in Orion, radiates with a peak wavelength of 145 nm. Find the temperature of Rigel's surface. K

Answer the following. (a) What is the surface temperature of Betelgeuse, a red giant star in the constellation of Orion, which radiates with a peak wavelength of about 970 nm? K (b) Rigel, a bluish-white star in Orion, radiates with a peak wavelength of 145 nm. Find the temperature of Rigel's surface. K

The active element of a certain laser is made of a glass rod 30.0 cm long and 1.50 cm in diameter. Assume the average coefficient of linear expansion of the glass is equal to 9.00 106 (C)1. If the temperature of the rod increases by 65.0C, what is the increase in (a) its length, (b) its diameter, and (c) its volume?

Q.9. Calculate the radius of a tantalum atom, given that Ta has a BCC crystal structure, a density of 16.6 g/cm³, and an atomic weight of 180.9 g/mol. Q.10. Some hypothetical metal has the simple cubic crystal structure shown in Figure. If its atomic weight is 74.5 g/mol and the atomic radius is 0.145 nm, compute its density

What fraction of the total volume of an iceberg is exposed above the surface of the ocean? DATA for the densities of sea ice and water: Use these values to 4 significant figures: 919.0 kg/m^3 and 1033 kg/m^3 A: 0.0469 OB: 0.0530 OC: 0.0599 OD: 0.0677 OE: 0.0765 OF: 0.0864 OG: 0.0977 OH: 0.1104

Use a magnifying glass to look at the grains of table salt that come out of a salt shaker. Compare what you see with 42.11a. The distance between a sodium ion and a nearest- neighbor chlorine ion is 0.261 nm. (a) Make an order-ofmagnitude estimate of the number N of atoms in a typical grain of salt. (b) What If? Suppose you had a number of grains of salt equal to this number N. What would be the volume of this quantity of salt?

at the temperature T=0 C, an aluminum ring has a circumference C=15cm whereas an iron cylinder has a circumference c= 15.05cm. what is the minimum common temperature we need to raise both metals to so that the cylinder can pass through the ring? (use for beta Al = 24*10-6 C-1 and beta Fe = 11*10-6 C-1 )

B/ answer with the word true or false and correct the error, 1- The total energy of the electron is usually greater than zero. If 2)the electron moves from one orbit to another higher than it, the velocity of the electron in the higher orbit increases 3- The hydrogen bond is mostly ionic 4) The probability of the existence of an electron at a level higher than the Fermi level at absolute zero is 50% 5) Propagation current arises from the effect of an electric field on a metal.

According to a new spectroscopy analysis, the adjacent bond vectors was found to be A = 1.07i + 0.83j + 0.81k B = 1.03i + -0.99j + -0.85k What is the angle (in degrees) between the bonds based on this new data?