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You and a friend are measuring a field for an ecology experiment. You walk due east at a speed of 0.9 m/s and your friend moves in a direction 30o east of north at a speed of 0.6 m/s. Both of you walk for 90 seconds when you simultaneously reach the end of the field. At the end of the walk, how far from your friend are you?
Electron A has a De Broglie wavelength (lambda). If electron B has twice the kinetic energy of electron A, the de Broglie wavelength of electron B is: A) 2lambda B) lamda * square root 2 C) lambda/ square root 2 D) lambda/ 2
he New England Merchants Bank Building in Boston is 152m high. On windy days it sways with a frequency of 0.20Hz, What is the total distance, side to side, that the top of the building moves during such an oscillation
An airplane takes off at sea level and climbs to a height of 480 m. Estimate the net outward force on a passenger's eardrum assuming the density of air is approximately constant
The drawing shows two boxes resting on frictionless ramps. One box is relatively light and sits on a steep ramp. find the speed of the lighter box
A standard violin string is 32.8 cm long from the tuning peg to the bridge. When played open(without pressing a finger against the fingerboard), What is the speed of the wave on the string
A 65.0 kg person jumps from rest off a 3.19 m-high tower straight down into the water. Determine the magnitude of the average force that the water exerts on the diver
You're planning to study in Europe, and you want a transformer designed to step 230 V. how many should the secondary have
A charged particle moving through a magnetic field at right angles to the field with a speed of 22.7 m/s experiences a magnetic force of 2.58 10-4 N. Determine the magnetic force on an identical particle
A heating element in a stove is designed to dissipate 3200 W of heat when it is connected to 245 V. Assuming that the resistance is constant, calculate the current in this element if it is connected to 115 V.
a car weighs 1,725 kg and is speeding on I-75 at 90 miles per hour. The brake rotors are made of 20 kg of iron and steel composite. What is the temperature change in the rotors
The velocity in a certain flow field is given by the equation V=(3x^2+1)i - 6xyj. Determine the expressions for rthe two rectangular components of acceleration.
The speed of an arrow fired from a compound bow is about 75 m/s. An archer sits astride his horse and launches an arrow into the air, what is the arrows range
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