Share
Explore BrainMass

Planets

MARS - RELATIVE AGES of areas

Would you consider the relative age of Area A to be more than the relative age of Area B? See attached files for full problem description.

Gravitation: Force, motion of satelllite, Kepler,s law

1. A 8754-kg satellite is orbiting planet Y at an altitude of 1.69x10^6 meters above its surface and with an orbital period of 15.2 hours. If the planet has a mass of 8.19x10^24 kg, then determine the radius of planet Y. 2. Suppose the earth had another moon which was 1.69 times as far from the center of the earth as our own

Physics: Conversion and Distance Calculations

1. Suppose my car engine has a displacement of 350 cubic inches. I wish to compare this with a European car which has a displacement of 1.7 liters. Convert 350 cubic inches to liters. 2. Suppose an astronaut on an alien planet drops a hammer and finds that it falls a total distance of 6.0 yards in 2.0 seconds. a. How far w

Thermal expansion and fluid statics

An aluminum cube floats in a bowl of liquid mercury at 0oC. If the temperature is raised to 27.5oC, by what percent will the fraction of volume submerged change?

Gravity Discussion

You are working for a telecommunication company that has several satellites in orbit. Your job is to work with NASA to monitor the satellites to see that they are functioning satisfactorily. One day, to your horror, an expensive 300-kg satellite orbiting at a height of 2000 km above the Earth surface has a freak accident with an

Mechanics and Gravitation: 17 Multiple choice questions

(See attached file for full problem description) --- Mark the following statements true or false. 1. (b) A conservative force can do no work on an object. 2. (a) Potential energy is necessarily a positive quantity. (b) Kinetic energy is necessarily a positive quantity. (c) The change in potential energy of an o

Speed

If D = 3.08 x 1011 meters and d = 1.08 x 1011 meters, and the green planet sweeps an area of 1 x 1014 m2 in a given short unit of time while traveling at 3.74 x 104 m/s, what is its speed at d to the nearest m/s? (See attached file for full problem description)

Gravity on a different planet

A planet/moon has a mass of 81.27 x 1023 kg and a radius of 12.95 x 106 meters. What is g on the surface to the nearest hundredth of a m/s2?

Force Problems5/6/7

Every few hundred years most of the plants line up on the same side of the Sun. Calculate the total forces on the Earth due to Venus, Jupiter, and Saturn, assuming all four plants are in line. The masses are Mv = 0.815Me, M3=318Me, Ms=95.1Me and their mean distance from the sun are 108,150, 778 and 1430 million km respectively.

Physics Questions

1. (a) Calculate the mass of the earth given the acceleration of gravity at the north pole is 9.830 m/s^2 and the radius of the earth is 6371 km from pole to pole. (b) Compare this with the accepted value of 5.979 x 10^24 kg. 2. (a) Calculate the ratio r^3/T^2 for the moon's orbit about the earth, where r is the average radi

2 Physics Problems

1. Suppose we roll a ball off a table, at a speed of 2.0 m/s. This means that the initial velocity is completely horizontal; there is no initial component of velocity in the vertical direction. The table is 1.3 meters high. (A) How much time does it take the ball to hit the ground after leaving the table? (B) How far does the ba

Planetary evolution and the early solar system

F. Which is hotter, Mercury or Venus? Why? h. Explain why there are two general families of planets, rocky terrestrial and gaseous jovian. j. What knowledge do comets and asteroids provide to studies of the origin of the solar system?

Discussion questions - eclipses, lunar phase changes, Newton

1. Explain what causes a lunar eclipse. Explain what causes a solar eclipse. Include a diagram. Why don't eclipses occur every month? 2. Describe the phase changes of the Earth that one would see if viewed from the Moon. 3. It is said that Newton unified Earth and the Universe. Explain.

2 problems on Kinematics: Cheetah hunting and astronaut on distant planet...

3) A cheetah is hunting. Its prey run for 2.5 s at a constant velocity of +6.9 m/s. Starting from rest, what constant acceleration must the + cheetah maintain in order to run the same distance as its prey runs in the same time? 4) An astronaut on a distant planet wants to determine its acceleration due to gravity. The astro

Three classical mechanics problems

(See attached file for full problem description) --- 1. A rock is thrown straight up from the earth's surface. Which one of the following statements concerning the net force acting on the rock at the top of its path is true? A It is equal to the weight of the rock. B It is instantaneously equal to zero newtons.

Forces and Newton's Laws of Motion

1. An airplane has a mass of 3.1 X 104 kg and takes off under the influence of a constant net force of 3.7 X 104 N. What is the net force that acts on the plane's 78-kg pilot? 3. In the amusement park ride known as Magic Mountain Superman, powerful magnets accelerate a car and its riders from rest to 45 m/s (about 100 mi/h)

Earth axis

How would the seasons be affected if the Earth's axis were not inclined 23 1/2 degrees from the plane of the ecliptic, but were instead perpendicular to that orbital plane?

Radius, Mass of Planets and Period of a Pendulum

My problem is understanding this because I have to calculate the mass and radius of 3 planets along with the graviational acceleration and then find the period of a 2 meter long pendulum on each planet for the assignment. The instructor posted a formula that he used in Excel but there was no explanation. The formula: =6

Masses of x-ray binary stars

Is it possible to calculate the masses of the stars in an x-ray binary system when all i know of the system is that; one of the stars is a main sequences star of spectral type K5 measured from optical spectroscopy. The companion star is believed to be a neutron star with no distinct pulsations, however the x-ray emission has exh

Physics: Solving for Angular Velocity

Question: A planet is rotating around a star. If the angular velocity of the planet at the near end is 3 rad/s, find the angular velocity at the far end: R2=3R1.

Physics Astronomy

1. Why does pressure in the atmosphere of a planet or satellite fall with increasing height? Please see attached for full question.