the ground state energy of an oscillating electron is 1.36 ev. how much energy must be added to the electron to move it to the third excited state? the fourth excited state?
a nearsighted man uses his ideally prescribed eyeglasses that have a refractive power of. he would like a prescription for contact lenses. what is the correct contact lens prescription if he normally wears his eyeglasses a distance of from his eyes
an electron travels with velocity < 4e5, 0, 0 > m/s. it enters a region in which there is a uniform magnetic field of < 0, 0.7, 0 > t. what is the magnetic force on the electron? b
Each 480-volt, three-phase, wye-connected feeder disconnect with a minimum rating of ___ amperes is required to be ground-fault protected.
depth of field refers to the distance in front of the camera (and its lens) in which the subjects are in apparent sharp focus. a lens with a short focal length has a complete depth of field. which image represents a complete depth of field?
a cyclist starts from rest and pedals so that the wheels make 8.00 revolutions in the first 6.60 s. what is the angular acceleration of the wheels (assumed constant)?
a bicycle wheel has an initial angular velocity of 1.50 rad/s. (a) if its angular acceleration is constant and equal to 0.200 rad/s2, what is its angular velocity at t
as you can see, a metal object is placed in a plastic cylindrical tub floating in a tank, causing the tub to partially sink. which force(s) are causing the tub to sink?
What is the net force acting on a particle with mass m moving with uniform speed of v in a circular path with radius r ?.
Suppose a child swings around her straight arm about her shoulder joint at an angular velocity of 13 rad/s. If her arm is 40. 0 cm long, what is the speed of her hand?.
A particle moves in a circle with radius 10 cm and with a uniform speed 1. 3 m/s. What is the centripetal acceleration of this particle?.
A particle moves in a circle with radius 10 cm and with a uniform speed 1. 3 m/s. What is the centripetal acceleration of this particle?.
Suppose a child swings around her straight arm about her shoulder joint at an angular velocity of 13 rad/s. If her arm is 40. 0 cm long, what is the speed of her hand?.
A force of 30 n to the right is applied to an object. An opposite force of 20 n to the left is applied to the same object. What is the net force applied to the object?.
