Solved: A rigid tank is divided into two equal parts by a

Introductory Chemistry 5
A lead fishing weight with a mass of 57 g absorbs 146 cal of heat. If its initial temperature is \(47\ ^{\circ}\mathrm{C}\), what is its final temperature? Equation Transcription: Text Transcription: 47

Classical Mechanics 0
Consider an object that is coasting horizontally (positive x direction) subject to a drag force f = by cv2. Write down Newton's second law for this object and solve for v by separating variables. Sketch the behavior of v as a function of t. Explain the time dependence for t large. (Which force term i

Classical Mechanics 0
The factor y in the Doppler formula (15.64), which can be ascribed to time dilation, means that even when 0 = 90 there is a Doppler shift. (In classical physics there is no Doppler shift when 6 = 90 and the source has zero velocity in the direction of the observer.) This transverse Doppler shift is t

Campbell Biology 9
A controlled experiment is one that a. proceeds slowly enough that a scientist can make careful records of the results. b. tests experimental and control groups in parallel. c. is repeated many times to make sure the results are accurate. d. keeps all variables constant. e. is supervised by an experi

Campbell Biology 10
Food chains are sometimes short because a. only a single species of herbivore feeds on each plant species. b. local extinction of a species causes extinction of the other species in its food chain. c. most of the energy in a trophic level is lost as energy passes to the next higher level. d. most pro

Krugman's Economics for AP* 2
At right is a simplified circular-flow diagram for the economy of Micronia. a. What is the value of GDP in Micronia? b.What is the value of net exports? c. What is the value of disposable income? d.Does the total flow of money out of householdsthe sum of taxes paid and consumer spendingequal the tota

Biology for AP Courses
Flamingos have genotypes for white feathers yet often appear with pink feathers within the same population. What is most likely affecting the phenotype of some flamingos, causing their feathers to turn pink in an isolated population? a. weather variations b. dietary changes c. DNA mutations d. transl

Psychology 5
The prisoners dilemma game illustrates a. in-group favoritism. b. the diffusion of responsibility. c. group polarization. d. the benefits and costs of cooperation.