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Solar System

Consider a 5-kg object interacting gravitationally with the earth. Imagine that we set up a standard reference frame with the z axis pointing vertically upward. If the interaction's potential energy when the object is at z = 5 m is -50 J, what is the approximate z-position of the object when it is at its reference separation from the earth?

Consider a 5-kg object interacting gravitationally with the earth. Imagine that we set up a standard reference frame with the z axis pointing vertically upward. If the interaction's potential energy when the object is at z = 5 m is -50 J, what is the approximate z-position of the object when it is at its reference separation fro

Potential Energies

Explain in everyday English and using formulas, the difference between 'electric potential' and 'electric potential energy'. Also explain, in the practical sense, why it matters that there is a difference. In other words, when will I ever see it? Also, explain why sometimes 'electrical' is interchanged with 'electrostatic' fo

Universe

12. The Universe according to the prevailing current body of evidence is likely to a. contract someday and implode on itself b. be an oscillator and right now it is simply in an expansion phase c. continue to expand forever d. heat up as the distance between galaxies increases 13.Select

Modern Physics: Number of cycles from two clocks

See attached file for full problem description. In the twin paradox, twin A remains on Earth while twin B travels a distance L, measured in the Earth's inertial frame, at a velocity v to a very distant solar system. In turning around for the return trip, the rocket malfunctions somewhat and achieves only a velocity ½ v. Fi

Shuttle launched on moon and in vacuum.

Suppose a shuttle were launched from a launchpad on the Moon instead of the Earth's surface. What changes would we observe? Suppose it were launched from a launchpad in space in vacuum. Would it work? What changes would we observe? Explain your answer.

Classical Mechanics Homework Problems

See attached file for full problem description. 1. Two masses are released at the same height, and fall a very long distance under gravity, till they hit the ground. The masses are subject to air friction, which you should assume has the form —b17 for both masses, even if this mathematical form is not very accurate. Mass A

Pressures for Stable Phases

Calcium carbonate, CaCO_3, has two common crystalline forms, calcite and aragonite. Calcite, unlike aragonite, is stable at earth's surface. Calculate the pressure (at room temperature) at which the other phase should become stable.

Angle Subtended by Sun and Moon at Earth & Angular Velocity

The moon has a diameter of 3.48 x 10^6 m and is a distance of 3.85 x 10^8m from the earth. The sun has a diameter of 1.39 x 10^9 m and is 1.50 x 10^11 m from the earth. (a.) What are the angles (in radians) subtended by the moon and the sun, as measured by a person standing on the earth. (b.) Based on the answers to part (a.), i

Planetary data

Main diameter Distance from Mass acceleration escape orbital # of object (miles or the sun AU (earth=1) of gravity(g) velocity period moons Km) Miles/Km (m/sec2) (Km/sec) (days/yrs) 1. the sun

Electromagnetic Theory - Relativity

Two cultures of a certain bacteria each consist initially of just one bacterium. This strain of bacteria is known to double in number every 24 hours. One culture is left on earth and the other is placed on a rocket that travels at 13/15 c relative to Earth. At a time when the culture on earth has grown to 256 bacteria, how many

Simple Harmonic Motion: Key Informaiton

A hole is drilled straight through the center of the earth and a particle is dropped into the hole. Neglect rotational effects: a) Show that the particle's motion, assuming that earth's gravity acts from the exact center of the earth, is simple harmonic motion. b) Calculate the Period of oscillation

Given the spectral irradiance by the sun as measured at upper levels of the atmosphere, what is the solar radiance measured at the same place? How much optical power could you collect with 1m^2 solar panel that is equally sensitive from 0.4um to 1.0um?

Given the spectral irradiance by the sun as measured at upper levels of the atmosphere, what is the solar radiance measured at the same place? How much optical power could you collect with 1m^2 solar panel that is equally sensitive from 0.4um to 1.0um? See attached file for full problem description including diagram.

Problems on relativity

9-The Tevatron accelerator at the Fermi National Accelerator Laboratory (Fermilab) outside Chicago actually consists of 5 stages to sequentially boost protons to 1 TeV (1000 GeV). What is the speed of the proton at the end of each stage? Note: the numbers given in parentheses represent the total kinetic energy at the end of each

A Rocket's Kinetic Energy and Maximum Height

A 150.0-kg rocket moving radially outward from Earth has a speed of 3.70 km/s when its engine shuts off 200 km above Earth's surface. a) Assuming negligible air drag, find the rocket's kinetic energy when the rocket is 1000 km above Earth's surface. b) What maximum height above the surface is reached by the rocket?

Gravitation: Force, central force and distance of closest approach.

3.) consider an object of mass m, moving in a circular orbit, subject to a central attractive for e whose magnitude is given by F(r) = h/r^3. a. what are the dimensions of h? b. show that the angular momentum for the motion is uniquely determined by h and m. c. what is the resulting relation b/t period and radius analogous to Ke

Vertical linear Motion Problem for conceptual understanding of vertical motion.

This is an An interesting problem to understand the vertical upward or downward motion conceptualy. Do you know how to apply kinematical equations to the vertical motion? Are you sared of solving tough problems on kinematical euqaions of motion? Don't worry, solving one such problem or properly understanding its solution will de

Motion

(See attached file for full problem description) Please do all problems step by step showing all math used and the equations. ANswers are given, but need to see how got answer. Skip the questions that given a sentence answer. Just do the math questions. Adult here doing his best to get this material. Thanks! 25. At ti

Spherical capacitor: Equivalent parallel plate capacitor

Derive an expression for capacitance of spherical capacitor (inner and outer radii are R1 and R2 respectively) and show that in case of small distance between spheres (R1 ≈ R2) capacitance can be calculated using the expression for parallel plate capacitor.

Physics: Protons, Speed, Clocks

1. Suppose we accelerate a proton so that its kinetic energy is equal to its mass energy. What is the speed of such a proton? NOTE: you do not have to know the mass of the proton to do this problem: it would be the same for any particle. 2. Spaceman Spiff passes the earth on his way to Mars. His thruster control is stuck and

The electromagnetic spectrum: sunlight intensity

What is the ratio of the sunlight intensity reaching Uranus compared with the sunlight intensity reaching Earth? (On average, Uranus's distance from the Sun is 19 times that of Earth's). ________ (intensity on Uranus / intensity on Earth)

Conceptual physics newtons law of force

1. Calculate the force of gravity between the earth (mass - 6.0 x 10 to the 24th kg) and the moon (mass = 7.4 x 10 to the 22 power kg) The average earth distance is 3.8 x 10 to the 8th power meters. 2. Calculate the force of gravity between a new born baby of mass 4 kg and the obstetrician of mass 75kg, who is 0.3 m from th

Newton's Laws and Circular Motion

A physics major is working to pay his college tuition by performing in a traveling carnival. He rides a motorcycle inside a hollow transparent plastic sphere. After gaining sufficient speed, he travels in a vertical circle with a radius of 13.0 m. The physics major has a mass of 70.0 kg, and his motorcycle has a mass of 40.0 kg.

Surface area problem

Question: Assuming that 68.6% of the earth's surface is covered with water at an average depth of 1.01 miles, estimate the mass of the water on earth in kg. Given the following: Density of water = 1000 kg/m^3 1 mile = 1.6093 km 1.01 miles = 1.6254 km Total surface area of earth = 509,600,000 km^2. Area of water =

MARS

What principles would I need to use to determine the relative age of an area on the surface of Mars? What would the effect from cosmic-ray radiation have on an astronaut?

Some Momentum Problems

1) A 2698 kg pick-up truck driven by Ford Tuff has a velocity of 42.4 m/s east. What is the magnitude of the momentum of the truck in kg-m/s? 2) A 2198 kg police pursued van is driven by Chase Mee. The van exhibits a momentum of 3698 kg-m/s. What is the velocity of the van in m/s as it veers rightward into a guardrail? 3) Rock