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Slide and Velocity

- A 71kg skater is sliding at a speed of 2.1m/s. He locks arms with his female partner, who is 52kg. If the coefficient of friction on the ice is .052, how far will the pair slide? - Neptune is 4.50 x 10^ 9km away from the Sun. If the earth is 1.50 x 10^8km away from the sun, what is Neptune's period away from the Sun in eart

The number of new starships

If you were planning a viral colonization of the galaxy and star ships made a stop about every 900 years on an Earth-like planet, retired the original star ship, established a civilization and 100 years later launched 2 new identical star ships that continued on similar 900 year missions, how many star systems would have been c

Milky Way Comparison

Compare the solar system with the Milky Way Galaxy. (They are very different, but the terms are often confused.) What are two similarities and two differences in their structure?

Defining Characteristics of the Planets

1. ____________________ Has similarities to the Earth in that it has seasonal changes, polar caps, and rotates in about 24 hours. It's surface has a red color due to iron oxide in the rock. Has numerous indications of ancient water flows. Has the highest mountain in the solar system. 3. ____________________ Its r


The origin of the Moon is a. a complete mystery to scientists b. the result of an ancient collision between Earth and another large body c. cannot be adequately hypothesized without more expeditions to the Moon d. the same as the origin of the Earth. The magnetic field of a planet depends o

Keplers 3rd law and derivations of it.

Attached are three questions. the first relates to kepler's 3rd law and calculating the maxima and minima of acceleration of a planet around a Sun. The second asks for this equation to be combined with Newton's law of universal gravitation to find the mass of the sun and the third asks for the period of another planet with a lar

Physics -Multiple choice questions and essay questions

1. The ratio of (1 kilogram/1 milligram) is a) 10^2 b) 10^3 c) 10^6 d) 10^-3 e) 10^-6 2. The length of each side of a square is 4.0 m. What is the length of the diagonal of the square (shown as a dashed line in the figure)? 4.0 x 4.0 a) 2.8m b) 3.5m c) 5.7m d) 8.0m e) 16m 3. Which statement is true concerning sc

Description of Star Characteristics

Here is what I would like some comments on: brief overview of the nature and importance of light and other electromagnetic waves. How stars fit in the hierarchy of the universe characteristics of stars Processes by which stars live and die how the materials are recycled and how this process might be related t

Gravity, Planets and Period of a Pendulum

A simple pendulum, such as a rock hanging from a piece of string or the inside of a grandfather clock, consists of a mass (the rock) and a support (the piece of string). When the mass is moved a small distance away from its equilibrium point (the bottom of the arc), the mass will swing back and forth in a constant amount of tim

Craters in the solar system

The surface of the Earth shows fewer meteor impact craters when compared to the surface of Mercury or our own Moon, which show thousands of impact craters each? Think of four specific reasons to explain this. For each reason, indicate what has an effect on the number of craters seen.

PHYSICS WITH Algebra Basics, Equations, and Mathematical Models

PLEASE SHOW WORK, POST FORMULA, CALCULATIONS AND ANSWER- Search the Internet to find the mass and radius of Mars, Venus and Jupiter in our solar system. THE MASSES MUST BE EXPRESSES IN KILOGRAMS AND RADII EXPRESSED IN METERS 1. Using your data, calculate the gravitational acceleration on each of the three planets

Acceleration of a Person on Mars

Mars has a mass of 6.46 x 10^23 kg and a radius of 3.39 x 10^6 m. What is the acceleration due to gravity on Mars and how much would a 65 kg person weigh on this planet?

The mass of a robot is 5450 kg.

The mass of a robot is 5450 kg. This robot weighs 3620 N more on planet A than on planet B. Both planets have the same radius of 1.33 x 10^7 m. What is the difference Ma-Mb in the masses of these planets?

Sunlight Intensity on Surfaces of Planets

The intensity of sunlight at the top of the Earth's atmosphere is about 1390 W/m2. The distance between the Sun and the Earth is 1.50×1011m, while that between the Sun and Mars is 2.28 ×1011m. What is the intensity of sunlight at the surface of Mars?

Angular speed and length of day calculations

(See attached file for full problem description) 53. Suppose Earth's radius increased uniformly by 0.001 percent without any change in mass. What would be the change in the length of the day? 33. A gob of clay, mass 100g, falls from rest a distance 75cm before striking and sticking to the edge of a wheel free to rotate a

20 Multiple Choice Questions

1) A 2-kg ball is moving with a constant speed of 5 m/s in a horizontal circle whose radius is 50 cm. What is the magnitude of the net force on the ball? a. 0 N b. 20 N c. 40 N d. 100 N 2) Kepler's second law tells us that planets sweep out equal areas in equal times. If you compare the amount of area per time swept b

Motion in a Plane

1.) An astronaut shipwrecked on a distant planet with unknown characteristics is on top of a cliff, which he wishes to descend. He does not know the acceleration due to gravity on the planet, and he has only a good watch with which to make measurements. He wants to learn the height of the cliff, and to do this, he makes two meas

Chem120: Force constant, angular momentum, harmonic function, U atom, spin state

See attached file for full problem description and clarity in symbols. 1. a) In the infrared spectrum of H79Br, there is an intense line at 2630 cm¡1. Calculated the force constant of H79Br and the period of vibration of H79Br. b) The force constant of 79Br79Br is 240 N ¢m¡1. Calculated the fundamental vibrational freque

Gravitation, centripetal acceleration, and weight

Planet X rotates in the same manner as the earth, around an azis through its north and south poles, and is perfectly spherical. An astronaut who weighs 943.0 N on the earth weighs 915.0 N at the north pole of Planet X and only 850.0 N at its equator. The distance from the norht pole to the quator is 18,850 km, measured along the

Gravity on Another Planet Problem

After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 49.0. The explorer finds that the pendulum completes 109 full swing cycles in a time of 127. What is the value of the acceleration of gravity on this planet? Express your answer in meters per second.

Gravitation: Force, motion of satellite, 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?