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Physics
College
A spaceship moves radially away from Earth with acceleration 29.4 m/s 2 (about 3g). How much time does it take for sodium streetlamps ( = 589 nm) on Earth to be invisible to the astronauts who look with a powerful telescope upon the city streets of Earth?
Business
High School
True or False: An interest-bearing account is an account that generates interest income on the available balance in the account. False
English
Middle School
How does Chris McCandless demonstrate Transcendentalism? Compare/contrast ChrisMcCandless with Emerson and Thoreau.
Chemistry
High School
Which of the following sites has volcanoes related to subduction? A is on an island arc, B is in the Andes, C is near Hawaii, D is along a mid-ocean ridge.
Mathematics
Middle School
Calculate the mean of 12, 15, 6, 4, and 3.
Social Studies
High School
An elderly woman in her mid-70's was walking to the local drugstore. On her way, a man shoved her as he walked by and stole her purse. She was not injured in the altercation but was clearly shaken up. About 10 minutes later, she began to experience shortness of breath and chest pain. She was taken to the emergency room. While she was being examined, she developed and irregular heartbeat and died.What is the manner, cause, and mechanism?
Chemistry
High School
Nitrogen gas and hydrogen gas are combined in a reaction to produce ammonia. If 3.0 moles of N2 and 12.0 moles of H2 are present in the mixture, which is the limiting reactant?
Mathematics
College
Let X1 and X2 be two random variables following Binomial distribution Bin(n1,p) and Bin(n2,p), respectively. Assume that X1 and X2 are independent.(a) The mgf of binomial distribution Bin(n, p) is (1 p + pet)n. Use this fact to obtain the distribution of X1 + X2.(b) Find the probability P(X1 + X2 = 1|X2 = k) for k = 0 and 1. Then use the law of total probability to find P (X1 + X2 = 1)
World Languages
Middle School
Words that start with Dec
Chemistry
College
Draw the Lewis structure (including all lone pair electrons) for one isomer of the molecular formula C3H8O.
Mathematics
High School
Which of the following statements would be correct to use when proving that limx4(3x4)=8? a. Given 0
Mathematics
Middle School
100 points for the first five people!!!!!
Mathematics
Middle School
Tony believes that x = -9 is a root of the polynomial x^2 + 13x + 36. Erika, however, believes that x = 4 is a root of the same polynomial. Who is correct?
Biology
Middle School
Samira watched a demonstration in which a scientist combined two substances in a sealed container and analyzed the results. The ending substances did not look the same as the starting substances. Samira was given a diagram with the repeating groups of atoms that make up the starting substances, plus information about the properties of the starting and ending substances. She created a model of the repeating groups of atoms that might make up the two ending substances. Does her model correctly show why the properties of the ending substances are different from the properties of the starting substances? Describe what could be correct or incorrect about her model.
Physics
Middle School
Wave 1 displaces according the function f()= 2sin +1. Wave 2 displaces according to the function f()= 3sin +.5. At what angle, in degrees, will the two waves have the same displacement?
Mathematics
Middle School
Courtney walked from her house to the beach at a constant speed of 4 kilometers per hour, and then walkedfrom the beach to the park at a constant speed of 5 kilometers per hour. The entire walk took 2 hours and thetotal distance Courtney walked was 8 kilometers,Let 6 be the number of hours it took Courtney to walk from her house to the beach, and p the number of hoursit took her to walk from the beach to the park.Which system of equations represents this situation?
Mathematics
Middle School
the solution to 5 - 3x> 35 is either x>-10 or -10> x. which solution is correct
Physics
College
Suppose you walk 17.5 m straight west and then 22.0 m straight north. How far are you from your starting point (in m)
Mathematics
Middle School
What is the answer for 25% of 450
Mathematics
Middle School
Please help! How do I simplify -16(0.47)^2?I know the answer, I'm just not sure of the steps.
Health
High School
5.Sperm and other secretions from the male reproductive system make up ___A. Penis B.Testosterone C.Testes D.semen E. Scrotum
Mathematics
Middle School
Solve the system of equations. y = 6x - 27 y = 4x - 17 a. ( -5, 3) c. ( 5, 3) b. ( -3, -5) d. No solution Please select the best answer from the choices provided A B C D
Mathematics
Middle School
6. Find the value of x.19x - 366x + 31
Mathematics
Middle School
Simplify 3(1/6+2/9) + (-2)
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