Explore BrainMass
Share

# Planets

### What is the mass of the star called Hot Jupiter

In 2004 astronomers reported the discovery of a large Jupiter-sized planet orbiting very close to the star HD 179949 (hence the term "hot Jupiter"). The orbit was just (1/9) the distance of Mercury from our sun, and it takes the planet only 3.09 days to make one orbit (assumed to be circular). What is the mass of the star? Expre

### Planetary atmospheres: Jupiter and Saturn

Describe two differences in the atmospheres of Jupiter and Saturn. Describe two similarities. What is differential rotation? Why is Jupiter more brightly colored than Saturn?

### The Atmospheres of Earth, Venus, and Mars

Describe the fate of the carbon dioxide and water vapor (which is how they measure or study evolution) in the atmospheres of the Earth, Venus, and Mars. A comparison of the evolution of the atmosphere on these planets would be very helpful. How did volcanism affect the atmosphere composition?

### Mercury's spin-orbit coupling overview

What is spin-orbit coupling? How can I describe Mercury's unique orbit around the Sun? What has caused this strange phenomenon to occur?

### Tidal effects and Formation of the moon.

How does the Moon cause the Earth's tides. What are the two types of tides and why do they occur? What are the different theories proposed for the formation of the Moon. What is the most widely accepted theory? Thanks.

### Geometrical calculation of planet orbit distances

I could use some help with Algebra Radicals. Thanks! Radicals Application Practice Answer the following questions. Use Equation Editor to write mathematical expressions and equations. First, save this file to your hard drive by selecting Save As from the File menu. Click the white space below each question to maintain

### Collisions of planets and comets, redshift of galaxies

1. A planet orbiting a star is occasionally hit by comets. Each comet has a mass of 4.8 * 10^6 kg of which 30% is rock and 70% is water ice. Each time a comet hits the planet 40% of the mass of the comet is vaporized and the rest is added to the planet, increasing the mass of the planet. If 6 comets hit the planet every 10 years

### Kepler's Laws

Copernicus set everyone on the right track with the heliocentric model but they still had to use epicycles to explain the planetary motions. What did Kepler introduce into the equation that allowed for the irregular planetary motions? (hint: it is a shape!). What are Kepler's Laws? What is eccentricity?

### Determine the orbital radius for the extrasolar planets

Determine the orbital radius for the extrasolar planets x and y. Answers should be in astronomical units. The planets are orbiting two stars with the same mass as our sun (1.9891 x 10^30kg). The planets are in two separate solar systems. There are no other planets in either system and both stars are at a distance of 1000p

### Planetary motions overview

Please help with the following problem. Every night, all stars and planets rise in the _______ and set in the ________. What direction do the planets normally move in across the sky with respect to the background stars (prograde motion)? What is retrograde motion, and why do we see it?

### Distance Between Vega vs. Sun to the Earth

Every second we move about 20 Km closer to the current position of the Vega. If Vega is 26.5 L-Y (light years) from Earth, how long will it take for the Sun (and it's planets) to travel this distance. I have extreme difficulty understanding calculations in light years and how many planets must travel along with the Sun to so

### Discussion on formation of rocky and gaseous planets

Discuss why the inner planets are rocky, and the outer planets are gaseous. If the Sun was substantially hotter than it is today would the range of gaseous planets in general be positioned further away from the sun then they are today? Discuss why or why not? Why is Pluto no longer considered a Planet? Any assistance with que

### The Orbits of Planets & Kepler's Law

What governs the orbits of the planets, meaning their speed and distance from the Sun? Why are the orbits of planets nearly circular yet the orbits of many comets and asteroids highly eccentric? Using Kepler's law how would you predict the distance of Jupiter from the Sun knowing the distance of the Earth from the Sun and the du

### Physics 7th edition by Cutnell and Johnson: Uniform Circular Motion and Gravitation

Conceptual Questions: 1. An object is thrown upward at an angle above the ground, eventually return to earth. (a) Is there any place along the trajectory where the velocity and acceleration are perpendicular? If so, where? (b) Is there any place where the velocity and acceleration are parallel? If so, where? In each case, ex

### Newton's Law of Motions: Sample Questions

The following questions and problems are from "Physics 7th edition by Cutnell and Johnson, Chapter 4" which includes the concepts like Newton's laws of motion, the vector nature of Newton's second law of motion, type of forces (gravitational, normal, static and kinetic/frictional forces, tension force), equilibrium and non-equil

### Observed emission actually left the Beta Pictoris system

(a) This question considers exoplanets, the environments in which they are born, and their methods of detection. (i) In Book 8 you were introduced to the discovery of the circumstellar disk around the star known as Beta Pictoris. With the knowledge that this object is 19.4 parsec away and using the fact that light travels at

### Interplanetary Travel: How fast is the spaceship traveling?

As measured in Earth's frame of reference, two planets are 436800 km apart. A spaceship flies from one planet to the other with a constant velocity, and the clocks on the ship show that the trip lasts only 1.24 s. How fast (in c) is the ship traveling? The answer is not .635c

### Interplanetary Travel: How Fast is the Spaceship Traveling?

As measured in Earth's frame of reference, two planets are 436800 km apart. A spaceship flies from one planet to the other with a constant velocity, and the clocks on the ship show that the trip lasts only 1.24 s. How fast (in c) is the ship traveling?

### Energy Calculations

The website in the problem isn't the greatest. Please feel free to use another source; just make sure you provide a address. Show all work step by step and provide justification and references. 1. McNary Dam a. How tall is McNary Dam? Solution: 183ft Source: http://www.nww.usace.army.mil/html/pub/pi/nav

### 20 Mulitiple Choice Questions on Physics: Energy and Environment

1) A total of 4900 J is expended in lifting a 50-kg mass. The mass is raised to a height of a) 10 m. b) 98 m. c) 960 m. d) 245, 000 m. 2) In a good wind, a modern large wind turbine might have a power output of a) 2 kW. b) 20 kW. c)200 kW. d)2000 kW. 3) It seems possible that a serious effort to improve the effici

### Planet Tehar, the acceleration of gravity is the same as that on Earth

On planet Tehar, the acceleration of gravity is the same as that on Earth but there is also a strong downward electric field with the field being uniform close to the planet's surface. A 1.50 kg ball having a charge of 5.38 uC is thrown upward at a speed of 20.7 m/s and it hits the ground after an interval of 3.74 s. What is the

### Physics: Weightless, astrologers, Milky Way, Tides, momentum, Titanic, rolling ball

Need help with these physics questions. Please provide explanations with answers. 1. On February 20, 1962, John Glenn became the first American to orbit Earth. If John Glenn weighed 640 N on Earth's surface, a) how much would he have weighed if his Mercury spacecraft had (hypothetically) remained at twice the distance from th

### Astronomy of Different Atmospheres

1. Do you believe that Mars might have harbored life in the past? 2. In your opinion, is life on Earth unique? 3. Do you believe that other stars have planets with atmospheres that are similar to Earth's? 4. What do you believe is intelligence? 5. Do you think humans will ever participate in interstellar flight?

Imagine that a civilization in another planetary system is sending a radio signal toward Earth. As our planet moves in its orbit around the Sun, the wavelength of the signal we receive will change due to the Doppler effect. This give SETI scientists a way to distinguish stray signals of terrestrial origin (which will not show

### Two Astronomy Questions

Two Astronomy Questions, site reference if used, no minimum or max word count just enough to justify the answer. 1) Do you think it is likely that the human race will continue to exist until the Sun begins to expand into a red giant? Explain why or why not. 2) Provide an example of popular culture's use of the term black

### Temperature and Heat Discussion

Physics - Fluids Description Read through chapter 11. These points will count toward your homework grade. 1. Question Details Notes Question: CJ7 11.CQ.004. Question part Submissions 1 2 3 4 0/2 0/2 0/2 0/2 As you climb a mountain, your ears "pop" because of the changes in atmospheric pressure. (

### GMOs, Sustainability and the future

Should we continue to develop genetically modified foods and expand their use? Is there hope for a sustainable future, in which both environmental quality and human well-being are improved? What can we do to advance sustainability?

### Brightness of an object

How much dimmer does the sun appear from Neptune than from Earth? The average distance between a planet and the sun equals the semimajor axis of the planet's orbit. I think you need to calculate a ratio, but I'm not sure.

### Physics Flat Plane Incline

1) A 5 kg block rests on a flat plane inclined at an angle of 300 to the horizon as shown in the diagram below. What would be the acceleration of the block down the plane assuming the force of friction is negligible? mgsinQ = ma 2) A projectile launched from the ground landed a horizontal distance of 120.0 m from its launch