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Suppose, instead, that the average photon wavelength is 795.0 nm. How many photons per second, N', would enter the aperture?
What is the change in electrical potential energy during the shrinking process? For your own interest, what does the work needed to change the potential energy?
A charge of 21 nC is uniformly distributed along a straight rod of length 4.3 m that is bent into a circular arc with a radius of 1.7 m. What is the magnitude of the electric field at the center of
A 13 kg box must be slid across the floor. If the coefficient of static friction between the box and floor is 0.37, what is the minimum force needed to start the box moving from rest?
A soccer ball is kicked from the ground with an initial speed of 20.6 m/s at an upward angle of 45°. A player 52.4 m away in the direction of the kick starts running to meet the ball at that ins
A parallel plate capacitor has a voltage of 391 V applied across its plates, then the voltage source is removed. what is the voltage is the space between them becomes filled with mica? ( the delectr
An initially uncharged electroscope is polarized by bringing a negatively charged rubber rod near the bulb. If the bulb end of the electroscope acquires a net charge of +3.00 , how many electrons a
Two charged spheres are 5.27cm apart. They are moved, and the force on each of them is found to have been tripled How far apart are they now?
Consider a particle with initial velocity u that has a magnitude 12.0 m/s and is directed 60.0 degrees above the negative x axis. how long Tg does it take for the balls to reach the ground? use 10.0
An airplane pilot wishes to fly directly westward. According to the weather bureau, a wind of 75.0 Km/h is blowing southward. The speed of the plane relative to the air (called the air speed) as mea
An airplane is dropping bales of hay to cattle stranded in a blizzard on the Great Plains. The pilot releases the bales at 180m above the level ground when the plane is flying at 70.0m/s 60.0 above
(a) Place a charge of -8.60 µC at point P and find the magnitude and direction of the electric field at the location of q2 due to q1 = 6.65 µC and the charge at P. magnitude N/C directi
A proton accelerates from rest in a uniform electric field of 662 N/C. At some later time, its speed is 1.50 x 106 m/s.
The model is rotated in a wind tunnel at a rotational speed of 450 rev/min. What is the radial acceleration of the blade tip expressed as a multiple of the acceleration of gravity?
For what range of (Vo) launch speeds will the water enter the tank? Ignore air resistance, and express your answer in terms of D and g.
Find the magnitude of your displacement during the gust. Express your answer using two significant figures.
The steel part has a length of 5.20cm . Find the length of the wooden section in meters.
Find an expression for the angle that will maximize the range of a projectile launched with speed from height above level ground. Express your answer in terms of the variables, and appropriate const
Assuming the diameter of a penny is 2.00 cm and its mass is 2.60g , what is the minimum air speed needed to lift the penny off the tabletop? Assume the air under the penny remains at rest.
The blood flow speed through an aorta with a radius of 1.05cm is 0.265m/s . If hardening of the arteries causes the aorta to be constricted to a radius of 0.850cm, by how much would the blood flow
An ideal fluid is moving at 2.8m/s in a section of a pipe of radius 0.18m . If the radius in another section is 0.38m , what is the flow speed there? (2 significant figures)
The traffic light turns green and you start speeding up your car from rest at constant acceleration. In the first 5.3 seconds, your car moves 122meters. How far did it move in the first 2.46seconds?
An object floats in the water with 60% of its volume submerged. What is its approximate density?
The gauge pressure at the bottom of a cylinder of liquid is 0.30atm. The liquid is poured into another cylinder with twice the radius of the first cylinder. what is the gauge pressure at the bottom