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The rms current in an ac circuit with a resistance of 140 is 0.88 A. What is the average power consumed by this circuit
If a laser operated on the n=5 to n=2 transition of a H atom, what wavelength in nm photon would be emitted? (E2= -82 kJ/mol, E1= -328 kJ/mol)
A thin lens made of glass has a focal length in air of 16.3 cm. A lens of exactly the same shape is then made from diamond. What is the focal length of the diamond lens in air
The current in a long solenoid of 95 turns generates a magnetic flux within it of 65.0 mWb per turn. what will be the induced emf
The time constant of an RL circuit with L = 25 mH is five times the time constant of an RC circuit with C = 40 µF. What is the time constant of the RL circuit
The resistance of a conductor is 19.2 ohms at 1.50 degress C and 25.0 ohms 91.0 degress C. What is the temperature coefficient of the resistance
At a certain time a particle had a speed of 84 m/s in the positive x direction, What was the average acceleration of the particle during this 2.7 s intervl
A student weighs 0.12311 g of na2co3 and dissolves it in 50.0 ml of water in an erlenmeyer flask. how many moles of hcl will be needed to reach the end point of titration
Imagine two Einstein solids in thermal contact. A has 300 atoms and B has 200 atoms, and qtotal = 100, how many macrostates are there
A solution of NaOH with pH 13.68 requires 35.00 ml of 0.128 M HClO4 to reach the equivalence point. What is the volume of the NaOH solution
An automobile of mass 1500 kg moving at 25m/s collides with a truck of mass 4500 kg at rest. What is the final velocity of the car after the collision
The component of the external magnetic field along the central axis of a 69-turn coil of radius 23.0 cm decreases from 1.90 T to 0.400 T in 1.70 s. what is the magnitude of the induced current in th
An RLC circuit consists of a 218 resistor, a 45 ?F capacitor, and a 298 mH inductor, What is the phase angle between the current and the applied voltage
A coil of wire containing N turns is in an external magnetic field that is perpendicular to the plane of the coil and it steadily changing, what will be the induced emf in the coil
Suppose Fuzzy, a quantum-mechanical duck, lives in a world in which h = 2?J · s. Fuzzy has a mass of 2.25 kg, What is the minimum uncertainty in the duck's speed
Four identical charges (+3.0µ C each) are brought from infinity and fixed to a straight line. Determine the electric potential energy of this group
A guitar string of diameter 0.6 mm and length 0.74 m is subject to a tension of 140 N. what is Young's modulus of the string
A simple pendulum uses a steel wire as the "string." The length of this wire is 1.5 m at room temperature. What is the change in the period of the pendulum
A hydraulic lift has pistons with areas 0.40m2 and 5.95m2 , and they're at the same height. how much mass can the larger piston support
An indicator has a pKa of 5.7 . It is colorless in acid solution and deep green in alkaline solution.
You shine violet light through a diffraction grating (200 lines/cm) on a screen 2.0 m from the grating. The width of the light beam is 0.15 mm. How many slits will the light pass through
Given three acid-base indicators - methyl prance ( end point at pH 4 ) bromthymol blue ( end point at pH 7) , and phenolphthalein ( end point at pH 9) select a suitable indicator for the following t
At a recent rock concert, a dB meter registered 114 dB when placed 1.30 m in front of a loudspeaker on the stage, What was the power output of the speaker
Assuming that the following structures exist, what is the bond hybridization of IF6- and IF4-? Would they be stable?
When light of wavelength 350 nm falls on a potassium surface, electrons having a maximum kinetic energy of 1.31 eV are emitted, find the cutoff wavelength