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The upward normal force exerted by the floor is 670N on an elevator passenger who weighs 710N . A) What is the reaction force to the upward normal force exerted by the floor? B) What is the reaction force to weight of the passenger? C) What is the magnitude of the acceleration? D)What is the direction of the acceleration?
What are the errors in the energy transformation using electrically heated calorimeter experiment (energy transfer between electrical and heat energy) ? ( container was closed and there was an outer covering to the metal to prevent heat loss)
A spherical water drop 2.9 ?m in diameter is suspended in calm air due to a downward-directed atmospheric electric field of magnitude E = 5240 N/C. How many excess electrons does it have
Two particles of masses m and 3m are moving toward each other along the x-axis with the same speed v. Determine the final speed of the heavier object
If an object is moving with constant momentum ‹ 12, ?16, ?7 › kg · m/s, what is the rate of change of momentum
Three moles of an ideal monatomic gas are at a temperature of 345 K. What is the final temperature of the gas
Emily has a field with uniformly cut grass of height 2 cm which grows at a constant rate. How long would it sustain each animal alone
Find the work done by an ideal engine which extracts 11500.0 J of heat from its hot reservoir while operating between 530.0 K and 310.0 K
A pinecone falls straight down from a pine tree growing on a 20 degree slope. What are the components of the pinecone's impact velocity parallel and perpendicular to the ground
An earth satellite moves in a circular orbit with an orbital speed of 6000m/s. Find the time of one revolution of the satellite
A vertical solid steel post of diameter d = 23.1cm and length L = 2.36m is required to support a load of mass m = 8260kg. What is the stress in the post
In a television set, electrons are accelerated from rest through a potential difference of 22 kV. Find the magnitude of the maximum magnetic force
The intensity of the sound wave from a jet airplane is 9.1 W/m2 at a distance of 130 m. At what rate does the jet airplane radiate energy in the form of sound waves
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