The useful work output can never be greater than or even equal to the total work input. True False

Multiple Choice Question The amount of energy required to change 1g of a substance from a liquid to a gas is called which of the following? Enthalpy Heat of vaporization Vaporization energy Condensation constant

The root/combining form in the term scintigraphy means spark short process of recording broken light

What information can be derived from the color of a star? square

What is best described as the energy of motion? the energy of an electrical charge kinetic energy potential energy the energy of fusion

What helps the protons and neutrons come together. Large amounts of gas Density and heat

What color surface temperature can be read most accurately with an infrared thermometer? Select one: A. Light-colored, dull surfaces are best because they will radiate infrared light instead of absorbing it. B. The closest to a flat black C. Shiny surfaces work best because they reflect infrared light better. D. Infrared thermometers are not affected by the color of the surface being measured.

Question: Which of the following are present in the nucleus of an atom? Answer Options: Select one of four Electrons only Protons and neutrons Neutrons only Protons and electrons

What information were you able to get from the lightcurve you created? a. The position of the stars and so, with that, being able to produce a precise astrometry b. The magnitude of the object c. The type of variable Star, the period and due to the type of variable Star it is possible to infer that they are in contact.

Objects with a neutral charge have more electrons than protons. True False

Hot Questions

1. Choose the correct statement or equation. When a wave in a string reflects from an open or flexible end, the reflected wave has the same wavelength and amplitude as the original wave. When a wave in a string reflects from a fixed end, the reflected wave has the same wavelength and amplitude as the original wave.

In what ways are meteorites different from meteors? What is the probable origin of each? Meteors typically come from comets that have passed through the solar system; their solid material is freed when the ice is vaporized by the heat of the Sun. Meteorites miss the atmosphere whereas meteors hit the outer layers only. Most meteors come from Mars and carry important information about the past of the red planet. Meteorites are large enough to withstand the violent passage through Earth's atmosphere, whereas meteors burn up from the heat of friction. Most meteorites, on the other hand, are from asteroids or from debris kicked up on the Moon or Mars during an impact.

If a rock is dropped from a height of 87 ft, its poistion t seconds after it is dropped until it hits the ground is given by the function $s(t)=-16t^{2}+87$ Round values below to 3 decimal places. How long does it take the rock to hit the ground? $\square $ seconds Find the average velocity of the rock from when it is released until when it hits the ground. $\square $ feet per second What time after the rock is thrown will its instantaneous velocity be equal to its average velocity? (Apply the Mean Value Theorem) $\square $ seconds after it is thrown

The bending or change in angle of light as it passes through a lens is called $\square $

Photons of a certain infrared light have an energy of $1.91\times 10^{-19}J$ (a) What is the frequency of this IR light? $\square $ Hz (b) Use $\lambda =c/f$ to calculate its wavelength in nanometers. $\square $ nm

The outer planets of the solar system were formed by asteroid agglomeration comet collisions gravitational forces temperature increases

Multiple Choice 2 points Step 3 of Part 2: The flashlight is shining to an azimuth of 225 degrees. What is the azimuth of the shadow? 0 degrees 45 degrees 90 degrees 180 degrees

1) The height of the Washington Monument is measured to be 170 m on a day when the temperature is $35.0^{\circ }C$ What will its height be on a day when the temperature falls to $-10.0^{\circ }C$ Although the monument is made of limestone, assume that its thermal coefficient of expansion is the same as marble's.

A point is subjected to 5 ksi biaxial tension. The diameter of the corresponding Mohr's circle is most nearly: O 5 ksi 7.07 ksi 10 ksi

A ball is thrown vertically upward. After r seconds, it's height him feet) is given by the function $h(t)=40t-16t^{2}$ After how long will It reach its maximum height? Do not round your answer. Time: $\square $ seconds