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Light from a He-Ne laser ( lambda = 632.8 nm) strikes a pair of slits at normal incidence, forming a double-slit interference pattern on a screen located 1.20 m
What minimum of 75-W light bulbs must be connected in parallel to a single 120-V household circuit to trip a 30.0-A circuit breaker?
Find the resistance of a light bulb that is connected to a 120-volt line and has a current of 0.5 amps flowing through it.
A transformer with 300 loops in primary coil is connected to a 120-V source. How many turns are required, in the secondary coil, to provide an output of 240V?
Two glass plates 10cm long are in contact at one end and seperated at the other end by a thread .050 mm in diameter.
When the voltage across a nonohmic resistor is doubled, the current through it triples. What happens to the power delivered to this resistor?
If a diffraction grating has 6,000 grooves per centimeter, to what angle will the first order constructive interference "line" of the Hydrogen Alpha
How long should a copper wire 0.4mm in diameter be for it to have a resistance of 10ohms? The resistivity of copper is 1.7 x 10-8 Q-m.
A Young's double-slit experiment is performed using light that has a wavelength of 615 nm. The separation between the slits is 5.5e-5 m.
Transformers in your neighborhood step up the voltage from power plants so that there is plenty of electricity to run your many home appliances.
At a particular point on a screen illuminated by two slits, the path length from that point to the bottom slit is greater than to the top slit.
A glass contains 0.25kg of water at 0c, 0.15kg of ice, also at 0c, is added to water and it is noticed that after 11 minutes all the ice has melted.
If the power needed to rotate wheel 1 is P1, what is the ratio P1/P2 of the power of wheel 1 to the power of wheel 2?
A uniform copper bar 50 cm long is insulated on the sides and has its ends exposed to ice and steam respectively. If there is a layer of water 0.1 mm thick
How long after the beginning of the power failure would it have taken the flywheel to stop if the power had not come back on?
We know that face centered lattice in cubic and orthorhombic (FCC & FCO) system are listed in Bravais lattice system but face centered tetragonal (FCT)
Sound waves of frequency 567 Hz enter a window 1.1 m wide. The window is in the exact center of one wall of a theater 24 m by 12 m.
When a helicopter is hovering 1450 m directly overhead, an observer on the ground measures a sound intensity I.
The water vapor pressure in the cloud is P h2o = 2.50mb. I have to develop an argument that shows the liquid droplets will tend to evaporate.
Josh and Pete are resting on top of the water near the end of the pool when Josh creates a surface wave
A typical photovoltaic cell delivers 4.2×10-3 W of electric energy when illuminated with 0.12 W of light energy. What is the efficiency of the cell?
A certain wave and its reflection simultaneously travel along a wire. The two waves are:
Electricity is distributed from electrical substations to neighborhoods at 1.5×104 . This is a 60 oscillating (AC) voltage.
Is there any way of connecting multiple 150-Watt light bulbs to a battery so that you could actually see them glow?
What is the potential energy of 1 liter (one kg} of water stored in the reservoir (P.E. = mgh), g = 9.8 m/sec^2?