Air ALWAYS moves in which direction? From high to low pressure From warm to cold From north to south From east to west

Work is defined as force times A distance B parallel distance C time D perpendicular distance

Select the incorrect statement for a mixture of gases at a temperature and volume. The average kinetic energy of molecules is the same. The speed of all the molecules is not the same. The speed of heavier molecules is faster than the speed of lighter molecules. The speed of lighter molecules is faster than the speed of heavier molecules.

In projectile motion, which of the following is not constant? A Vertical velocity B Horizontal velocity C Acceleration D None of these

Which item is a potential source of RFI? a. Alternator b. Contact friction c. Air friction d. Cell phone

FoS Text: Ch12 Which of the following instruments is used to study objects smaller than the wavelength of light? A optical microscopes B optical telescopes C radio telescopes D electron microscopes

Which type of artifact is most likely to produce a doubling of a single image? Reflection Refraction Reverberation Section thickness

Dark matter is inferred to exist because: we see lots of dark patches in the sky. it explains how the expansion of the universe can be accelerating. we can observe its gravitational influence on visible matter.

Select the correct answer. Which sentence about particles in matter is true? A. Atoms are present in solids and liquids but not in gases. B. The particles of matter are in constant motion C. The same kinds of atoms are found in different elements. D. When a solid changes to a liquid the sizes of the particles change.

What happens to the particles of a substance as its temperature increases? They move faster. They move slower. They lose some energy. They move in a circular direction.

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