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Find the frequency of a sound wave moving through iron at 25°C with a wavelength of 0.665 m.
What is its wavelength as observed at Earth (give your answer in nm or )? (c) What kind of light is this: X-ray? Ultraviolet? Optical? Infrared?
A 79 kg pole-vaulter falls from rest from a height of 4.6 m onto a foam-rubber pad. The pole-vaulter comes to rest 0.30 s after landing on the pad. Calculate the athlete's velocity just before reac
A cannonball launched with an initial velocity of 151 m/s at and angle of 35° follows a parabolic path and hits a balloon at the top of its trajectory. Neglecting air resistance, how fast is it
What is the final temperature of the water and the glass in C (specific heat of water =1.00 cal/g C, specific heat of glass =0.200 cal/gm C)?
Draw the force vectors to some suitable scale showing the relative forces acting on the stone. B. Which is the longer vector, and why?
What is the angular momentum of a 3.2 kg uniform cylindrical grinding wheel of radius 12 cm when rotating at 1400 rpm?
A 5.0m diameter garden pond holds of water. Solar energy is incident on the pond at an average rate of 400 watts per meter squared. If the water absorbs all the solar energy and does not exchange e
A rifle is aimed horizontally at a target 48.0 m away. The bullet hits the target 2.30 cm below the aim point.
A crate of mass m=115kg is pushed at a constant speed up a frictionless ramp (30 degrees) by a horizontal force. What are the magnitudes of the force, and the force on the crate from the ramp?
An object when orbiting the Earth at a height of three Earth radii from the center of the Earth has a weight of 3.00 N. What is the objects mass?
A Federation starship with mass 1.90×10^6 kg) uses its tractor beam to pull a shuttlecraft (2.20×10^4 kg) aboard from a distance of 10.0 km away. The tractor beam exerts a constant force
What is the smallest diameter spot the eye can produce on the retina if the pupil diameter is 4.10 {rm mm}? Assume light with a wavelength of lambda = 600 {rm nm}.
A wheel 65.0 cm in diameter accelerates uniformly from 230 rpm to 355 rpm in 7.0 s. How far will a point on the edge of the wheel have traveled in this time?
How much more precisely should this quantity be determined in order to make the uncertainty terms associated with L and r equal to each other?
What is the threshold energy for the Pb-206(γ, p) Tl-205reaction? Which one competes with Pb-206(γ, n) (Pb-205) reaction?
A butterfly at eye level is 23 cm in front of an plane mirror. You are behind the butterfly, 51 cm from the mirror. What is the distance between your eye and the image of the butterfly in the mirro
Why do you think a student might make that mistake? What might you say to the student to help him avoid that mistake in the future?
A vertical electric field of magnitude 2.00 × 104 N/C exists above the Earth's surface on a day when a thunderstorm is brewing. A car with a rectangular size of 6.00 m by 3.00 m is traveling
A stone with a mass of 0.600 is attached to one end of a string 0.900 long. The string will break if its tension exceeds 55.0 . The stone is whirled in a horizontal circle on a frictionless tableto
Suppose that in a particular vacuum tube the potential of the anode is 340 V higher than that of the cathode. If an electron leaves the surface of the cathode with zero initial speed, what is its s
At a factory, a noon whistle is sounding with a frequency of 490 Hz. As a car traveling at 77 km/h approaches the factory, the driver hears the whistle at frequency fi. After driving past the facto
How does a person's level of autonomy affect their sence of freedom? How would a person who aligns him or herself with the incremental theory view his or sence of freedom differently from a person w
what"s the AC line voltage (in the US)? Then, how much current to give 75W? (power = voltage x current) Finally, what"s the resistance?
What is the shortest height a plane mirror must be so that a person who is 1.6 meters tall is able to see his or her whole body? Draw a ray diagram to support your answer.