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One tyype of electromagnetic radiation has a frequency of 107.1 MHz, another type has a wave length of 2.12x10^-10m and another type of electro magnetic radiation has photons with energy = to 3.97x
A coin is placed 6.32 cm in front of a concave mirror. The mirror produces a real image that has a diameter 3.93 times that of the coin. What is the image distance?
If 124 kJ of heat are absorbed in a reaction that forms nitricoxide from nitrogen and oxygen, what mass of NO must have been produced? What mass of N2 was consumed?
The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with an rms value of 3.75 times 10-10 T. The wave passes perpendicularly through an open window, the area o
Three persons throw identical rocks with the same speed from a bridge to the water. The first person throws the rock 30 degrees above horizontal, the second one throws it horizontally, and the 3rd o
A girl stands on a rotating merry-go-round, 2.1 m from its center. If the girl has a speed of 2.0 m/s, what is the minimum coefficient of static friction between her feet and the merry-go-round that
At 40 degrees Celsuis, KI has a solubility of 160 grams KI per100 grams of water. How many grams of KI are needed to prepare asaturated solution using 25 grams of water?
Describe precisely the behavior of an RLC circuit at the resonant frequency. Be quantitative as to (a) the size of the peak current as compared to the peak current at other frequencies, and (b) the
The electric field everywhere on the surface of a charged sphere of radius 0.240 m has a magnitude of 580 N/C and points radially outward from the center of the sphere. (a) What is the net charge on
What is the net ionic equation for the reaction that occurs when solutions of lead(II) nitrate and ammonium sulfate are combined?
Two point charges attract each other with an electric force of magnitude F. If one charge is reduced to one-third its original value and the distance between the charges is doubled, what is the resu
A 225 turn rectangular coil having dimensions of 3.4 cm by 4.8 cm is placed in a uniform magnetic field of magnitude 0.88 T (a) Find the current in the coil if the maximum torque exerted on it by the
A model of a helicopter rotor has four blades, each 3.50 m in length from the central shaft to the blade tip. The model is rotated in a wind tunnel at 690 rev/min. (a) What is the linear speed of th
Assuming that the first step of the mechanism is rate determining, predict the rate expression for the overall process. Write the chemical equation for the overall process.
What are the velocities of the two people after the snowball is exchanged? Disregard friction between the skates and the ice.
A horizontal spring is lying on a frictionless surface. One end of the spring is attached to a wall whle the other end is connected to a movable object.
Three 4.0-uF capacitors are connected in parallel across the terminals of a 60.0-Hz generator. What is the capacitive reactance of the circuit?
0.300 L of H2 gas collected over water at27oC on a day when the atmospheric pressure was 745torr. What would be the volume of H2 gas at 760 torr after the water vapor was removed? (P H2
What happens if concave lens is filled with water ,assuming the refractive index for lens is 1.6 and Dioptre = 5 per metre and a planer-concave lens.? a) Is it possible to create a net postive lens
You are given 2 burettes: one with 0.10 M acetic acid, one with0.15 M sodium acetate. How much of each would you mix together to produce a total of 20.0 mL of solution with a pH of4.70? (You may not
A block of ice at 0 C whose mass is initially 50.0 kg slides along a horizontal surface, starting at a speed of 5.38 m/s and finally coming to rest after traveling 28.3 m. Compute the mass of ice me
A chemist prepared a 0.244 M solution of fructose at 25 degrees celsius. At equilibrium it was found that its concentration had decreased to 0.183M. What percentage of fructose was converted to gluc
You have a symmetric double concave lens with power D = -2 per meter. a) Determine the radius of curvature and the principle planes (assume a 1mm vertex separation).
You find that some sand has mixed in with you melting point sampleof a pure compound. Knowing that sand does not dissolve in your melted compound, what is the effect of the sand on the melting point
Now the incline has a coefficienct of kinetic friction uk, if the block attached to the springs is observed to stop just as it reaches the spring's equilibrium position, what is the coefficient of f