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You arrive for a party on a night when it's 8 degrees celcius outside. Your hosts meet you at the door and say the party may need to be cancelled, because the heating system has failed and they don't want to discomfort their guests. You say, "Not so fast!" A total of 36 people are expected, the average power output of a human body is 100 W, and the house loses 320 W/degrees celcius. Will the house remain comfortable? Suppose that comfortable temperature is 18 degrees celcius.
A zookeeper and a monkey. The zookeeper shot a tranquilizer gun with an initial v=30m/s. The monkey was up on a tree 140m high. What is the monkeys speed during free fall
A dance studio has flat mirrors on opposite walls, and multiple images are observed when a person stands between them, What is the image distance for the first image behind the north mirror
The maximum speed of a child on a swing is 4.62 m/s. How high above the ground is he at his highest point
a particle with charge -6.24 times 10-6 coulombs is released at rest in a region of constant uniform electric field.
An 8.7 hour trip is made at an average speed of 73 km/hr. If the first third of the trip (chronologically) was driven at 96.5 km/hr, what was the average speed for the rest of journey.
The first controlled, sustained flight in a heavier-than-air craft was made by Orville Wright on December 17, 1903. The plane took off at the end of a rail that was 60 feet long, and landed 12 seconds later, 180 feet away from the beginning of the..
An archer puts a 0.33 kg arrow to the bowstring. An average force of 183 N is exerted to draw the string back 1.3 m. suppose that air resistance is negligible.
q1. consider a plane wave of monochromatic green light 600 nm that is incident normally on two identical narrow slits.
The wavelength of visible light ranges from 400 nm to 700 nm. Find the ranges of this light's angular frequency
Find the object distances (in terms of f) for a thin converging lens of focal length f if, calculate the magnification of the lens for cases (a) and (b)
A stereo speaker has a surface area of 0.043 m^2. The acoustic power output of the speaker is 1.7 W. Calculate the intensity of the speaker
Estimate the power radiated by a basketball at 20 deg C and a human body at 37 deg C. Use Stefan-Boltzmann Law
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