How would you determine the absolute zero temperature? a) Approach it using a gas thermometer at very low pressure b) Measure it using a mercury thermometer at the temperature that nitrogen boils c) You can not determine that temperature d) Measure it using a gas thermometer at zero pressure

61. Why does a red shirt look red? A) Because it absorbs red light. B) Because it is transparent to red light. C) Because it is creating and emitting red light. D) Because it absorbs all colors of light except red which is reflected. 62. Why does a black shirt look black? A) Because it absorbs black light. B) Because it is transparent to black light. C) Because it reflects black light. D) Because it absorbs all colors of light and does not reflect any colors of light. 63. Which of the following is the taking in of wave energy by a surface and converting it to a different form? A) absorption B) transmission C) refraction D) reflection 64. Which of the following is when a wave changes direction as it enters a new medium? A) absorption B) transmission C) refraction D) reflection 65. Why are sunsets and sunrises red/orange in color? A) Red color has low frequency and is scattered more B) Red color has high frequency and is scattered more C) Red color has low frequency and is scattered less D. Red color has high frequency and is scattered less 66. What is the relationship between signal quality and distance that the signal can travel? A) Low quality signals travel longer distances B) Low quality signals travel shorter distances C) High quality signals travel longer distances D) All signal qualities travel the same distance 67. Calculate the speed of light in glass that has an index of 1.627 . A) 1.4times 10^8m/s B) 1.8times 10^8m/s C) 3.0times 10^8m/s D) 4.9times 10^8m/s

kg Express your answer using four significant figures. square kg

A satellite (mass 500 kg) orbits a planet (mass6times 10^wedge 24kg) at a distance of 7times 10^wedge 6m What is the gravitational force between them?(Use the desmos calculator to solve) F=(Gm_(1)m_(2))/(r^2) (Use the gravitational constant G=6.674times 10^-11Ncdot m^2/kg^2) (1 point) 2.04times 10^4N 4.76times 10^4N 4.08times 10^3N 3.43times 10^3N

3. How much work can'a 500 W electric mixer do in 2.5 minutes?

Select all of the answers that apply. Warm water __ is less dense than cold water has lower salinity than cold water has higher salinity than cold water is more dense than cold water is found near the poles

What is the weight in newtons of an object that has a mass of 0.02 mg? Express your answer in newtons using three significant figures. W=square N

Follow the directions in the animation to the right, recording the masses in the boxes below. Mass of aluminum: square g Mass of copper: square g Mass of iron: square g Mass of lead: square g Make sure that you record the mass of each metal in the proper column of the data table. A piece of weigh paper is on the balance. Tare the balance.

__ is the process in which matter changes from the liquid to the solid state. a Melting b Vaporization c Freezing d None of the above

Define push factor,and give some examples of push factors.

Hot Questions

A certain wave function is given by $\psi (x)=\{ \begin{matrix} A&for-a\leqslant x\leqslant a\\ 0&otherwise\end{matrix} $ Which of the following corresponds to the Fourier transform for this wave function? A sum of spherical harmonics. A sum of sines and cosines. A sum of Hankel functions. The Dirac delta function.

8> What is the random capture theory? Which theory best explains how our solar system was created?

Which of the following expressions correspond to the energy-time uncertainty principle? $\Delta E\Delta t\geqslant 2\bar {h}$ $\Delta E\Delta t\geqslant \hat {h}$ $\Delta E\Delta t\geqslant \frac {h}{2}$ $\Delta \omega \Delta t\geqslant \bar {h}$

A wave function can be expanded in basis states as $\vert \psi \rangle =\sum _{n}a_{n}\vert \psi _{n}\rangle $ What must be true of the expansion coefficients? $\sum _{n}\vert a_{n}\vert ^{2}=1$ They must be real numbers. There is no restrictions on the coefficients. $\sum _{n}a_{n}=1$

Match each statement to the wave interaction it describes. \begin{array}{|l|l|} \hline\ reflection\ &\ Waves\ bounce\ off\ an\ object.\ \\ \hline\ absorption\ &\ Waves\ are\ taken\ in\ by\ an\ object.\ \\ \hline\ transmission\ &\ Waves\ bend\ while\ passing\ from\ one\ medium\ to\ another.\ \\ \hline\ diffraction\ &\ Waves\ scatter\ through\ an\ opening\ or\ around\ an\ object.\ \\ \hline\ retraction\ &\ Waves\ go\ through\ an\ object.\ \\ \hline \end{array}

Consider the following force: A fridge magnet is pulling on a paper clip. According to Newton's third law what other force must be happening? The paper clip is pushing on the fridge magnet. The paper clip is pulling on the fridge magnet.

For Newton's third law the action and reaction forces are equal in magnitude and opposite in direction. A True B False

Which one of the following actions will increase the current ratio, all else constant? Assume the current ratio is greater than 1.0

11. ¿Qué es un campo gravitacional? A) Una región donde se experimenta una fuerza eléctrica. B) Una región donde se experimenta una fuerza magnética. C) Una región donde se experimenta una fuerza gravitacional D) Una región sin ninguna fuerza.

Why is a solid less compressible than a gas? Gases have more volume Solids are made of metals Solid particles are tightly packed Solids are heavier