From what material did the moon form? material from Earth material from the Sun material from Mars material from comets

Images sent back to Earth from the Hubble telescope were the first to show the features of the moon sun and its planets. planet Earth from space. farthest reaches of the universe

4. (2 points) Explain the meaning of Gibb's free energy. How does it relate to the Second Law of Thermodynamics?

The center of gravity should be low during acceleration while running True False

Males have a higher center of gravity than females. True False

The center of mass does not change with a change in body position. True False

Select the statement that accurately describes the objects in a planetary system. Planets and moons orbit stars. Planetary systems only consist of 12 or more planets and their moons. Planets orbit moons and moons orbit planets. Moons and planets are part of planetary systems. Moons orbit planets and planets orbit stars. Moons and planets are part of planetary systems. Moons orbit planets and planets orbit stars. Planets are part of planetary systems. Moons are considered their own system.

6. A lawn cutter is rolled across the lawn by a force of 115 N pushing along a handle angled 22.5^circ below the horizontal.Danielle develops 64.6 Watts of power pushing this lawn cutter for 90.0 seconds. What distance was the lawn cutter pushed?

Does doubling the sound intensity double the sound intensity level (decibel level)? Yes No Explain. square This answer has not been graded yet.

Why is fusion nuclear energy currently not widely used as a source of electricity? Fusion reactions have not yet been achieved. Fusion reactions cannot be controlled. Fusion reactions require very high temperatures and pressure. Fusion reaction energy cannot be converted into electricity.

Hot Questions

A heavy stone and a light stone are released from rest in such a way that they both have the same amount of gravitational potential energy just as they are released. Air resistance is negligibly small Which of the following statements about these stones are correct? (There could be more than one correct choice.) a) The stones must have been released from the same height. b) Just as it reaches the ground, the light stone is traveling faster than the heavy stone. c) The initial height of the light stone is greater than the initial height of the heavy stone. d) The stones both have the same speed just as they reach the ground. e) The stones both have the same kinetic energy just as they reach the ground.

33. What does a transformer do? 34. Write the transformer equation relating voltage and number of turns. 35. A transformer has 200 turns in the primary coil and 20 in the secondary coil If the input voltage is 2400 V.what is the output voltage? 36. Why is voltage stepped up for power transmission over long distances?

Calculate the force on a 160m wire carrying 150A of current if a magnetic field of $5\times 10^{-5}$ T makes a $165^{\circ }$ angle with the wire. $\square $ N

Two iron bars attract each other no matter which ends are placed together. Are they both magnets? Explain. $\square $

Absolute vorticity is a combination of curvature and shear vorticity. True False

A gravitational field surrounds anything that has __ A density B electricity C velocity D mass

You would have the largest mass of gold if it weighed 1 N on the Moon Earth both the same on the Earth the mass will be double

How many significant figures are in this length? .002500 dm $\square $

A projectile travels 1,120 feet per second. How fast is the projectile traveling in miles per hour? The projectile travels $\square $ miles per hour. (Type an integer or decimal rounded to the nearest tenth as needed )

Use the formula $F=G\frac {m_{1}m_{2}}{d^{2}}$ where $F=the\quad force\quad of\quad gravity$ $G=universal\quad gravitational\quad constant$ $m_{1}$ and $m_{2}=masses\quad of\quad the\quad two\quad objects$ $d=the\quad distance\quad between\quad the\quad centers\quad of\quad the\quad two\quad objects$ What would result in the greatest gravitational force between two objects? A halving the mass of object 1 B doubling the mass of object 1 C halving the distance between the two objects D doubling the distance between the two objects