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A bird watcher meanders during the woods, walking 0.50 km due east, 0.75 km due south, and 2.15 km in the direction 35.0° north of west. The time needed for this trip is 2.50 h. decided the magnitude and direction (relative to due west) of the bird watcher’s displacement and average velocity. Use kilometres and hours for distance and time, respectively.
The sound level in decibels is typically expressed as ? = 10 log (I/I0), but since sound is a pressure wave, the sound level can be expressed in terms of a pressure difference. Intensity depends on the amplitude squared, so the expression is ? = 2..
sodium light of wavelength 589 nm is focused through a pinhole before illuminating youngs double aperture with an
A block of metal has an actual weight of 45 N and an apparent weight of 25 N in water. What is the buoyant force from the water
asssume 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 speed when it strikes the anode.
ccccthe Zambesi river in Africa rushes over Victoria Falls at a rate of 25 x 10^6 gallons per minute. The falls are 108 m high, 1 gallon equals 3.785 x 10^-3 m^3 (or 0.1337 cubic foot), and the water has a density of 1.00 x 10^3 kg/m3 (each cubic foo..
A half-Atwood's machine consists of two masses, m1 = 8 kg and m2 = 5 kg, which are connected by a light string that passes over a pulley. what speed will it have just before hitting the floor
A 1010 kg car and 4600 kg truck undergo a perfectly inelastic collision. Find the velocity of the wreckage immediately after the collision
Assume the acrylic D-shaped lens, What is the critcal angle of the d-shaped lens while it is in water
A musician plays a string on a guitar that has a fundamental frequency of 330.0 Hz. The string is 64.2 cm long and has a mass of 0.316 g. At what speed do the waves travel on the string
A baseball pitcher can throw a fastball at a speed of ~150 km/hr. what is the largest size spherical asteriod of density p = 3 g cm^-3 from which he can throw the ball fast enough that it: a) escapes from the asteroid into heliocentric orbit?
5 moles of an ideal gas, initially at P=105 Pa and V=3m3, expand adiabatically until the volume is doubled, How much work was done in the adiabatic step
Determine the moment of inertia for three children weighing 61.0 lb, 47.0 lb and 81 lb sitting at different points on the edge of a rotating merry-go-round, which has a radius of 12 ft.
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