You are running at constant velocity in the x direction, and based on the 2D definition of projectile motion, Vx=Vxo. In other words, your velocity in the x direction is equal to the starting velocity in the x direction. Let's say the total distance in the x direction that you run to catch your own ball is D (assuming you have actual values for Vx and D). You can then use the range equation, D= (2VoxVoy)/g, to find the initial y velocity, Voy. g is gravitational acceleration, -9.8m/s^2. Now you know how far to run (D), where you will catch the ball (xo+D), and the initial x and y velocities you should be throwing the ball at, but to find the initial velocity vector itself (x and y are only the components), you use the pythagorean theorem to solve for the hypotenuse. Because you know all three sides of the triangle, you can also solve for the angle you should throw the ball at, as that is simply arctan(y/x).
Answer:
1. Ptolemy.
2. Nicolaus Copernicus.
3. Tycho Brahe
4. Galileo Galilei
5. Isaac Newton
6. William Herschel
7. Johann Galle
8. Clyde Tombaugh
9. Albert Einstein.
10. Edwin Hubble
11. Karl Jansky.
12. Grote Weber.
Explanation:
1. Ptolemy: said sun revolved around earth.
2. Nicolaus Copernicus: aid earth revolved around sun.
3. Tycho Brahe: analyzed motions of planets.
4. Galileo Galilei: first used refracting telescope for astronomy.
5. Isaac Newton: invented reflecting telescope.
6. William Herschel: discovered the planet Uranus.
7. Johann Galle: discovered the planet Neptune.
8. Clyde Tombaugh: discovered the dwarf planet Pluto.
9. Albert Einstein: developed special and general theories of relativity.
10. Edwin Hubble: demonstrated that universe is expanding.
11. Karl Jansky: discovered radio waves from the center of the Milky Way.
12. Grote Weber: an amateur astronomer who built the first radio telescope.
Answer:
The movement of electricity-conducting iron from the convection currents and the spinning of the earth induces a current which induces a magnetic field.
Explanation:
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C.0 because it didn't move<span />
Answer:
Barriers to and risks associated with an increasing use of nuclear energy include operational risks and the associated safety concerns, uranium mining risks, financial and regulatory risks, unresolved waste management issues, nuclear weapons proliferation concerns, and adverse public opinion.
Explanation:
