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Solar System

Incompressible flow around a cylinder

Verify that the potential Phi = U (r +a^2/r)*cos(theta)-2U*a*theta can represent such a flow about a solid cylinder of radius a. Find the tangential velocity at the surface of the cylinder. Use Bernoulli's equation to show that the pressure field is given by: p(a,theta) = C - 2*rho*U^2*(sin^2 theta + 2sin theta) Fin

Coriollis Force and Noninertial Frames

A particle is projected vertically upward from the surface of the earth at colatitude (polar angle) theta. It rises to a height (h << R_earth) and then falls back to the surface. Show that it strikes the ground at a distance (8/3)*omega*sin(theta)*Sqrt(2h^3/g) to the west of the initial position, where omega = angular velocit

Magnetic field due to a current carrying wire

Jumper cables used to start a stalled vehicle often carry a 15 A current. How strong is the magnetic field 16 cm away? What percentage of the Earth's magnetic field (5.00 E-5 T) is this?

This job accounts for weightless feelings.

A bungee jumper feels weightless as she falls toward the Earth. Obviously the force of gravity has not disappeared simply because she has jumped off a high platform. What accounts for the weightless feeling people get when they fall freely?

Density of Rock

A geologist finds that a moon rock whose mass is 8.80 kg has an apparent mass of 6.7 kg when submerged in water. What is the density of the rock? kg/m3

Four problems on mechanics

Please help with the following problems. 1. A car starts from rest and reaches a speed of 31m/s in 2 seconds. Calculate its acceleration, if this value stays the same then what it the speed 7 seconds later? 2. A ball is thrown off a very tall building with a velocity of 16 m/s. What is the speed of the ball after 1.1 seco

Haley's comet orbits the sun every 76 years, and was first observed in 240bce.

Haley's comet orbits the sun every 76 years, and was first observed in 240bce. Its orbit is highly elliptical, so that its closest approach to the sun (perihelion) is only 0.587 AU, while at its greatest distance (aphelion), the comet is 34.39 AU from the sun. (An AU, or astronomical unit, is the distance from earth to the sun,

Astronomy is the most ancient science.

Astronomy is the most ancient science. Discuss how the development of astronomy is interrelated with the development of civilization. Some possible relationships include astrology, the names of constellations, calendars, and the basic ideas of mankind's place in the universe.

right ascension and declination of the point in the sky

Question 1 What are the right ascension and declination of the point in the sky where the ecliptic and the celestial equator intersect in March each year? The Sun crosses this point from the Southern Hemisphere to Northern Hemisphere in the sky. R.A. = _____ H _____ M Declination = __________ degrees __________ minut

Displacement Vector

See the attached file. Could you please provide the answers and workings out to the following physics problems. 8. which one of the following quantities is a vector quantity? a) the age of the earth b) the mass of a football c) the earth's pull on your body d) the temperature of an iron bar e) the number of people atte

Force of Mutual Attraction

Consider 2 iron spheres, each with a Diameter of 100mm which are just touching. a) Compute the force of mutual attraction when the spheres are just touching b) At what distance ,r, from the center of the earth will the force of mutual attraction between the contacting spheres be equal to the force exerted by the earth on

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

The Net Gravitational Force on the Moon

The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force FSM that the sun exerts on the moon is perpendicular to the force FEM that the earth exerts on the moon. The masses are: mass of the sun = 1.99 1030 kg, the mass of earth = 5.98 * 10^24 kg, mass of moon = 7.35 * 10^22 kg. The dis


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

Lorentz Force on an air plane due to earth magnetic field

Due to friction with the air, an airplane has acquired a net charge of 1.70 x 10^-5 C. The plane moves with a speed of 2.80 x 10^2 m/s at an angle with respect to the earth's magnetic field, the magnitude of which is 5.00 x 10^-5 T. The magnetic force on the airplane has a magnitude of 2.30 x 10^-7 N. What is the angle?

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

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

A simple pendulum and its period in different planets

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 time called the period. One period is the amount of time required for the mass to swing all the way to the other side and then swing back to its staring point. we are maki

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

distance from the seismograph to the location of earthquake

When an earthquake occurs, two types of sound waves are generated and travel through the earth. The primary, or P wave has a speed of about 8 km/s and the secondary wave, or S wave has a speed of about 4.5 km/s. A seismograph, located some distance away, records the arrival of the P wave, then 78 s later, records the arrival of

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