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Two radio antennas operating at 6.00 Mhz are separated by 120.0m along a North-South line. They are driven in-phase with each other.
1. In what directions on the compass do the antennas interfere constructively? (find the directions for interference maxima)
2. Find the directions on the compass in which no radiation is sent out?
a sound wave of frequency 1225 hz travels through the air directly toward a wall, what is the initial wavelength of the sound
A 0.600 mole sample of an ideal gas is at a temperature of 303 K at atmospheric pressure. Calculate the volume occupied by the gas
Six grams of helium (molecular mass = 4.0 u) expand isothermally at 320 K and does 9000 J of work. determine the ratio of the final volume of the gas to the initial volume
An orbiting satellite stays over a certain spot on the equator of (rotating) Earth. What is the altitude (in km) of the orbit (called a geosynchronous orbit)?
In a wire with a 1.67-mm2 cross-sectional area, 8.43 × 1020 electrons flow past any point during 3.87 s. What is the current in the wire
While surveying a cave, a spelunker follows a passage 190{rm m} straight west, then 210{rm m} in a direction 45.0^circ east of south, and then 260{rm m} at 30.0^circ east of north. After a fourth unmeasured displacement, she finds herself back whe..
An air puck of mass m1 = 0.30 kg is tied to a string and allowed to revolve in a circle of radius R = 1.0 m on a frictionless horizontal table. The other end of the string passes by a hole in the center of the table, and a mass m2 = 1.20 kg is att..
To charged dust particles exert a force of 3.2 * 10-2N on each other. What will be the force if they are moved so they are only 1/8 as far apart?
A 20-N horizontal force pushes an object along a rough floor so that the object moves with a constant velocity of 7.0 m/s
A 70.0 kg football player leaps straight up into the air (with no horizontal velocity) to catch a pass. If the ball was moving horizontally when it was caught, how fast was the ball travelling
A marble (radius 1.5 cm and mass 5.0 g) rolls without slipping down a ramp of vertical height 26 cm. What is the speed of the marble
An ion accelerated through a potential dif- ference of 177 V experiences an increase in kinetic energy of 6.03 × 10?17 J . Find the magnitude of the charge on the ion.
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