A boy is pulling a sled with a net force of 10 N. If the mass of the sled is 20 kg, what is the acceleration of the sled? 5.0m/s^2 0.5m/s^2 0.2m/s^2 2.0m/s^2

If a force of 6 newtons to the right and a force of 6 newtons to the left are acting upon a ball, the ball will: move to the left with the same speed move to the right with the same speed continue with the same velocity be forced vertical with the same speed

5. What is the phase of the moon when it is between first quarter and full moon? waxing crescent waning crescent waxing gibbous waning gibbous

Ingrid says that a red ball of clay appears red because the clay reflects red wavelengths Simon says that the clay appears red because it allows red wavelengths to pass through it. Which statement best explains who is correct? Ingrid is correct. The clay appears red because it reflects red wavelengths. Ingrid is correct. The clay appears red because it is a type of matter. Simon is correct. The clay appears red because it allows red wavelengths to pass through it. Simon is correct. The clay appears red because it is a solid.

What is most likely to cause someone to fall overboard? A balancing the weight of people and gear B sitting on a pedestal chair while anchored C fishing from a boat D standing up in a boat

Why does it have more potential energy? It is taller and height increases potential energy. It is faster and speed increases potential energy It uses a motor so there is

Cranberry juice in a glass has a density of 1.12 grams per cubic centimeter and a mass of 476 grams . Calculate its volume. (A) Write your answer as a whole number. square cubic centimeters

the sum of the kinetic energies of the objects in a system point masses inelastic collision conservation of momentum principle linear momentum isolated system internal kinetic energy change in momentum impulse perfectly inelastic collision elastic collision

Refugee Quiz 16-18 Josef asks the captain Why the boat is steering itself Why is the boat going so fast When will the boat reach Cuba

(Q037) Identify the true statement. Clouds are white because they absorb the entire spectrum of visible-light colors. Blue light has a longer wavelength than red light. The sky looks blue because atmospheric gas molecules are scattering blue light. Aerosols scatter only light waves with short wavelengths.

Hot Questions

Which of the following describe the expansion coefficients for a general state? $a_{n}=\langle \psi _{n}\vert \psi \rangle =\int _{-\infty }^{\infty }dx\psi _{n}^{\ast }(x)\psi (x)$ $a_{n}=(\sum _{n}\vert \psi _{n}\rangle )\vert \psi \rangle $ $a_{n}=\langle \psi _{n}\vert \psi \rangle ^{\ast }=\int _{-\infty }^{\infty }dx\psi _{n}(x)\psi ^{\ast }(x)$ $a_{n}=\langle \psi _{n}\vert \psi _{m}\rangle =\int _{-\infty }^{\infty }dx\psi _{n}^{\ast }(x)\psi _{m}(x)$

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?

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}

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

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.

Which of the following correspond to the first-order shift in energies using time-independent perturbation theory? $\vert \langle \psi _{n}^{0}\vert \delta \hat {H}\vert \psi _{n}^{0}\rangle \vert ^{2}$ $\langle \psi _{n}^{0}\vert \delta \hat {H}\vert \psi _{n}^{0}\rangle $ $\sum _{m\neq n}\frac {\langle \psi _{n}^{0}\vert \delta \hat {H}\vert \psi _{n}^{0}\rangle }{E_{m}^{0}-E_$ $\sum _{m\neq n}\frac {\vert \langle \psi _{m}^{o}\vert \delta \hat {H}\vert \psi _{n}^{o})\vert ^{2}}{E_{m}^$

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

If a wave function is given in terms of orthonormal wave functions as $\vert \psi \rangle =\frac {1}{\sqrt {5}}\vert \psi _{1}\rangle +\sqrt {\frac {3}{5}}\vert \psi _{2}\rangle +A\vert \psi _{3}\rangle $ Then what must be true about A? $\frac {1}{\sqrt {5}}$ $\frac {1}{2}$ There is not enough information to determine A. $\frac {1}{5}$