Numerade

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What is the frequency of 20-mm microwaves? 15 MHz 600 MHz 15 GHz 67 GHz 60 MHz

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A spherical giant molecular cloud, composed predominantly of molecular hydrogen, H2, has a total mass of 15M@, has constant density throughout the cloud, and is 0.3 pc in diameter. Part (a): Calculate the density and the number density of hydrogen molecules, nH2 . Part (b): If the temperature of this cloud is 15 K, what is its Jeans mass? Part (c): Explain briefly - would this cloud collapse spontaneously

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A group of particles is traveling in a magnetic field of unknown magnitude and direction. You observe that a proton moving at 1.30 km

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Two 78.5-kg hockey players skating at 7.47 m/s collide and stick together.

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Problem #4: 45 Points A. Find the Work done, the spring constant on a spring-mass system for a distance between 3 and 10mm. Given the characteristics of spring graph below and the integral shown. $\int_{x_1}^{x_2} F(x)dx$ Force vs delta x B. Prove the integral of work done on this system equals the geometric area under the curve for distance between 3 and 10mm. Show all math to prove this.

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A project to develop a new GPS system has a first cost of $1,000,000. The before tax ROR is 12%. Assume the company has a T$_e$ of 37%. Determine the approximate after-tax ROR of the project. Write your formulas and identify your variables. SHOW ALL WORK

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Texts: A random sample of 88 eighth-grade students' scores on a national mathematics assessment test has a mean score of 267. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 260. Assume that the population standard deviation is 31. At α = 0.05, is there enough evidence to support the administrator's claim?

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Question 9 Evaluate the definite integral. Round to three decimal places. $\int_0^1 \sqrt{1x + 4} dx$

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4. Block A translates in a horizontal slot and is pushed along by a bar B. Angular velocity and angular acceleration of the bar about point O are 10 rad/sec CW, and 30 rad/sec² CCW. a) Determine velocity of point M on Block A when $\alpha$=60° b)Determine Acceleration of block A when $\alpha$=60°

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(b) Evaluate the limit Plug in 2 where ever there's x $\lim_{x \to 2} \frac{x^3 + x^2 - 6x}{x - 2}$

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margaret m.