Consider a room that is initially at the outdoor temperature of 20oc. the room contains a 40-w lightbulb, a 110-w tv set, a 300-w refrigerator, and a 1200-w iron. assuming no heat transfer through the walls, determine the rate of increase of the energy content of the room when all of these electric devices are […]
Which of the following elements is most important for respiration? carbon oxygen hydrogen nitrogen
This problem explores the behavior of charge on conductors. we take as an example a long conducting rod suspended by insulating strings. assume that the rod is initially electrically neutral. for convenience we will refer to the left end of the rod as end a, and the right end of the rod as end b. […]
The equilibrium constant is given for two of the reactions below. determine the value of the missing equilibrium constant. a. 3.5 x 10-5 b. 2.8 x 104 c. 8.1 d. 0.12 e. 89
The relative humidity in a greenhouse at 45 °c is 92.0%. calculate the vapor pressure of water vapor in the greenhouse.
If the mass of the eyeball is 7.9 g, what is the effective spring constant of the musculature attached to the eyeball?
Of the charge q on a tiny sphere, a fraction α is to be transferred to a second, nearby sphere. the spheres can be treated as particles. (a) what value of α maximizes the magnitude f of the electrostatic force between the two spheres? what are the (b) smaller and (c) larger values of α […]
White light is incident on a material with an index of refraction for red light (n = 1.348), and an index of refraction for blue light (n = 1.449). the angle theta is 43.8 degrees. if the frequency of the red light is 4.653*10^14 hz, what is the wavelength of red light in the block […]
What is the maximum wavelength of light capable of removing an electron from a hydrogen atom in the energy states characterized by n = 1 and n = 4? (the rydberg constant for hydrogen is approximately −2.178 ✕ 10−18 j.)?
Suppose you have a coffee mug with a circular cross section and vertical sides (uniform radius). What is its inside radius if it holds 400.0 g of coffee when filled to a depth of 6.00 cm? Assume coffee has the same density of water. Answer in cm.
