
A train whistle has a frequency of 100 hertz as heard by the engineer on the train. Assume that the velocity of sound in air is 330 meters per second. If the train is approaching a stationary listener on a windless day at a velocity of 30 meteres per second, the whistle frequency that the...

1. Tom has a mass of 70.0 kg. and Sally has mass of of 50 kg. Tom and sally are are standing 10.0 m apart on the dance floor find the size of the gravitational force. 2. If a torque of of 55.0Nm is requiredto turn a bolt and the largest force you can apply is 135N, how long is the lever? 3....

Hi I can accept your answer for the other one but then could you at least solve it? I need it by Tuesday. This is the 15 question one and could you please try to solve all of them? Thanks

You will have to do two (2) essays. Here is the first: You are to write on one specific species within these groups of bacteria.Rickettsia Chlamydia Mxobacteria Bacillus Clostridium Lactobacillus Actinomycetes. You must consult at least three to four scholarly references regarding each organism....

I need help with this lab https://www.youtube.com/watch?v=602uWV8a7s&feature=youtu.be

Space scientists wish to place a satellite in orbit about the sun in such a way that the gravitational force between the satellite and the sun is 1/36 of its present value at a distance of one astronomical unit from the sun. At what distance from the sun in astronomical units must the satellite...

I need a tutor for an hour on Wed April 1st from 5pm6.30pm PT to help with a physics timed assignment. The tutor will need to be accessible immediately during that hour and a half and will need to complete the problems given quickly and clearly.

A certain asteroid was observed to sweep out an orbital area of 450 billion square kilometers during the year 2013. a. How much orbital area will the asteroid sweep out this year? b. How much orbital area did the asteroid sweep in spring break(1week)?

I need help with this lab https://www.youtube.com/watch?v=602uWV8a7s&feature=youtu.be

The satellite Phoebe of the planet Saturn orbits Saturn every 1.5 years at a mean distance of .086 astronomical units. Find the mass of Saturn in solar mass units?
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Sample Questions
 The Earth’s rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2000 the Earth takes about 0.548 s longer to complete 365 revolutions than it did in the year 1900.
 (a) What is the average angular acceleration of the Earth?
 (b) If this average acceleration remains constant, in what year will the Earths rotation come to rest?
1. Can you show me step by step how to solve this problem?:
 A spherical balloon is made from a material whose mass is 3.00kg. The thickness of the material is negligible compared to the 1.5m radius of the balloon. The balloon is filled with helium (He) at a temperature of 305degrees K and just floats in the air, neither rising nor falling. The density of the surrounding air is 1.19kg/m^3. Find the absolute pressure of the helium gas
2. I do not understand this Ideal Gas Law and Kinetic Theory question. Can you help me set it up?