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Three forces are exerted on a 6.00-kg block initially at rest on a horizontal slippery surface xy: a 100-N force directed along the positive x axis, a 50.0-N force that makes an angle of 30.0 with the positive x-axis, and a 137-N force that makes an angle of 190 with the positive x axis.
What is the work done on the block in 10.0 s?
Waves from a radio station have a wavelength of 308 m. They travel by two paths to a home receiver 77.0 km from the transmitter. What is the minimum distance from the mountain to the receiver
a circular coil of wire consisting of 100 turns each of radius 8.0 cm carries a current of 0.40 a. what is the
A test tone used on a radio has a frequency of 993 Hz. What is the wavelength of this sound in air at average room temperature (68 oF). Record your answer to three decimal places.
When the plutonium bomb was tested in New Mexico in 1945, approximately 1 gram of matter was converted into energy. Suppose another bomb is tested, and 9.8 grams of matter are converted into energy. How many joules of energy are released by the explo..
A rookie quaterback throws a football with an initial upwardvelocity component of 13.0 m/s and ahorizontal velocity component of 24.0m/s. How high is this point
An iron vat is 17 meter long at room temperature (20°C). Determine how much longer is it when it contains boiling water at 1 atm pressure
Light is normally incident on one face of a 30degree flintglass prism. Calculate the angular separation of red light (650nm) and violet light (450 nm) emerging from the back face. Use nred=1.644 and nviolent=1.675.
A leaf of area 44 cm2 and mass 4.5 10-4 kg directly faces the Sun on a clear day. The leaf has an emissivity of 0.86 and a specific heat of 0.8 kcal/kg·K. Estimate the rate of rise of the leaf's temperature
A wave travels along a stretched string. The vertical distance from crest to trough for this wave is 15 centimeter, Find what are the wavelength and the amplitude of this wave
The voltage across a two terminal device is always 15.0 V. The maximum power the device can dissipate is 0.87 W - Determine the maximum current magnitude allowed by the device power rating.
Two men lift a 45 kg block from the floor to a shelf 1.0 meter above the floor without accelerating the block. How much work is done by each man
Algol consists of a 3.7 MSun main-sequence star and a 0.8 MSun subgiant. Why does this seem surprising, as a minimum at first.
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