In 1.91 minutes a ski lift raises four skiers at constant speed to a height of 124 m. The average mass of each skier is 70.3 kg. What is the average power provided by the tension in the cable pulling the lift?
Example The simple harmonic wave on a string y=0.02cospi (5x-200t) , mu =0.5kg/m Find A,f,I , v,T Solution
As the number of collisions of an ideal gas increases, which of the following will also occur? (Select all that apply.) The gas will become solid. The number of chemical reactions will increase. The gas will become compressed. The temperature will increase. The pressure will increase.
Places where the particles in a longitudinal wave are closer kogether are called square
Which statement about electrica currents is correct? Alternating current can be stored in a battery. Alternating current is produced from a voltage and current that remain constant and flow in the same direction. Direct current is used for most electrical systems in the automobile. Direct current changes direction from positive to negative.
(}_{15)^29Parrow _(+1)^0beta +_(14)^29Si Classify the given reaction Fission Electron Capture Positron Emission Induced Transmutation Fusion Alpha Decay Beta Decay
4. Radioactive isotope Carbon-14 decays exponentially. If the continuous decay rate is 12% per thousand years and the current mass is 802.50 grams, what will the mass be 10 thousand years from now?
A golfer hits a golf ball with an initial velocity of 107 miles per hour. The range R of the ball as a function of the angle 0 to the horizontal is given by R(Theta )=678sin(2Theta ) where R is measured in feet. Complete parts (a) through (c) below. (a) At what angle (6) should the ball be hit if the golfer wants the ball to travel 564 feet (188 yards)? Theta =square ^circ (Type an integer or decimal rounded to the nearest hundredth as needed.)
The ability to use force with great speed is Distance Power Reaction time Coordination
Pick the right options in the dropdown below. After a disturbance, square happens. This is the process of recovery and change.
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
