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A cylindrical glass of water (H2O) has a radius of 3.96 cm, How many moles of water are contained in the glass
A sound wave of frequency 400 Hz has an intensity of 2.00 µW/m2. What is the amplitude of the air oscillations
Two speakers, one directly behind the other, are each generating a 245-Hz sound wave. What is the smallest separation distance between the speakrs
Two identical spools are held at the same heights above the floor. The thread from the spool A is tied to an overhead support while spool B is not connected to the support. which spool will hit the
What must be the area of a suction cup that is completely evacuated and a ceiling if the cup is to support a child who weighs 30 kg
A balloon is released from a tall building. The total mass of the balloon including the enclosed gas is 1.5kg. Its volume is 2.5m^3. What is the average density of the balloon with gas
You have made a raft to transport your fortune in gold across the lake. What is the maximum mass of gold you can carry without sinking the raft
The current in a resistor is given by I = (5.14) sin (70 pi t) when a voltage given by V = (180V) sin (70 pi t) is applied to it. What is the period of the voltage source
Find the energy (in joules) of the photon that is emitted when the electron in a hydrogen atom undergoes a transition from the n = 5
Suppose you're building a scale model of the hydrogen atom, How many miles away (1 mi = 1.61 Ã- 105 cm) should the electron be placed
The nucleus of the hydrogen atom has a radius of about 1.1 Ã- 10-15 m. find the volume of the nucleus
Electrons are used in a single-slit diffraction experiment. Such an experiment works well if the slit has a width of 10 times the wavelength. what is the electron energy
A passenger car traveling due east at 53.6 m/s passes a truck traveling due east at 13.4 m/s. What is the frequency heard by the driver of the car
A flat puck with mass M=.10kg is rotated in a circle with radius R=.20 m on a frictionless air-hockey tabletop at constant speed. then what is the weight G=mg of the dangling block
In a parallel circuit I=10.0A. There are 4 resistors. R1=13ohms R2=7ohms R3=15ohms R4=21ohms. What is the voltage drop across each resistance
Can Somone please help me out????A 63.0 m length of insulated copper wire is wound to form a solenoid of radius 2.3 cm. What maximum energy is stored in the inductor
When there is an input connected across a 12V DC source what is the voltage of the output voltage after the power is connected for a while
A heat engine has an effiency of 35.0 % and recieves 150 K of heat per cycle. How much heat does it exhaust in each cycle
An ideal gas has a pressure of 2.5 atm, a volume of 1.0L at at temperature of 30 degrees Celcius. How many molecules are there in the gas
A point source of light is submerged 2.5 m below the surface of a lake and emits rays in all directions. What is the maximum radius that this circle could have
Manufacturers of headache remedies routinely claim that their own brands are more potent pain relievers than the competing brands. Find the number of molecules of pain reliever
Four answers required for this problem. A converging lens has a focal length on both sides of 24.0 cm. Is the image to the left or right of the lens
This question requires three answers. Three resistors are connected in parallel with a 9.0 V battery. What is the voltage drop across R2
This question requires four answers. A15 Ω resistor, a 0.30 μF capacitor and a16.0 mH inductor are in a series, What is the rms voltage across the inductor
This question requires two answers. A hollow metal sphere carries a charge of 5.0 μC. How much charge is on the larger sphere