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An airtight box has a removable lid of area 1.11E-2 m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 8.58E+4 Pa. The inside of the box is completely evacuated. What is the magnitude of the force required to pull the lid off the box?
A 65 kg man in a 5.9 kg chair tilts back so that all his weight is balanced on two legs of the chair. Assume that each leg makes contact with the floor over a circular area of radius 0.9 cm.
Your physics TA has a far point of 0.711 m from her eyes and is able to see distant objects in focus when wearing glasses with a refractive power of ?1.47 D. Determine the distance between her glasses and eyes
The atmosphere on Mars is almost all carbon dioxide (CO2), and has a pressure of about 6.9×102 Pa, what is the mass of one cubic meter of the atmosphere
How much current does an immersion heater draw from the car
A 1500 kg car moving east at 26 m/s collides with a 1720 kg car moving south at 15 m/s and the two cars stick together.
After two days, only one-quarter of a radioactive sample remains. What is the half life of the nuclei
An ideal spring with a spring constant of 25.0 N/m is suspended vertically. A 1.00 kg object is attached to the unstretched spring and released. Determine the magnitude of the oscillations
q1. an object weighs 302 n in the air. when tied to a string connected to a balance and immersed in water it weighs 220
Two very thick equally-magmetized square plates of side 0.23m and of mass 20 g, Calculate the B field between the two plates, if the distance between them is 0.123 cm
Calculate the magnitude of the electric field at the origin due to the following distribution of charges: -q at (x,y) = (a,a), +q at (a,-a), +q at (-a,-a) and -q at (-a,a)
While a person is walking, his arms swing through approximately a 45.0 degree angle in 0.510 s. What force would the blood vessel exert if the arm were not swinging
A Nichrome wire is used as a heating element in a toaster. From the moment the toaster is first turned on to the moment the wire reaches it maximum temperature, What is the temperature change in the wire
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