### Will we be able to live on Earth even 4 billion years from now?

Will we be able to live on Earth even 4 billion years from now?

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Will we be able to live on Earth even 4 billion years from now?

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.

Although human beings have been able to fly hundreds of thousands of miles into outer space, getting inside the earth has proven much more difficult. The deepest mines ever drilled are only about 10 miles deep. To illustrate the difficulties associated with such drilling, consider the following: The density of steel is about

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

For a hammer dropped on earth, the initial gravitational potential energy is 60.0 J. What would be the initial gravitational potential energy for the hammer on the moon (where the acceleration due to gravity is 1.67 m/s(squared) if it is released from the same height in both places? U(moon)= ?J What would be the initi

How many kilometers would you have to go above the surface of the earth for your weight to decrease to half of what it was at the surface?

I need help with the following problems. 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 num

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

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

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

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

A pendulum clock works perfectly on the Earth. It is then taken to the Moon, which has 1/6 the gravity of Earth. a) Does it run fast or slow? b) If the clock is started at 12:00 a.m., what will it read after one Earth day (24hrs)?

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.

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

Determine how much farther a person can jump on the Moon as compared to the Earth if the take-off speed and angle are the same. The acceleration due to gravity on the Moon is one-sixth what it is on Earth.

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.

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

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

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

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? See attached file for full problem description including diagram.

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 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?

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

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

(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

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.

How much potential energy with respect to ground level does a 10.0-kg lead weight have when it is 2.00 meters above the surface of the ground?

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

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)