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Solve the following questions:
Question 1: A house has the footage of 2000 sqft. The ceiling height is 8' (8 ft). The air density is 1.3 kg/m3. What is the total mass of the air inside that house (your choice of units)?
Question 2: How many hours will it take a single adult to "breath through" all the air in the house from the question above? An adult breathes in/out 500 mL of air per inspiration, and makes 20 breaths per minute.
Please help for the above questions, totally confused!! Show each steps if possible, Thanks.
A toroid is a coil of wire wrapped around a doughnut-shapedring (a torus). For a tightly wrapped toroid with N turns, the magnetic field lines of Bform concentric circles inside the toroid, and the field is zero outside.
If a virtual image is formed 10.0 cm along the principal axis from a convex mirror of focal length -15.0 cm, how far is the object from the mirror
the only force acting on a 2.0 kg canister that is moving in an xy plane has a magnitude of 5.0 n. the canister
When responding to sound, the human eardrum vibrates about its equilibrium position. Assume an eardrum is vibrating with an amplitude of 6.15*10-7 m and a maximum speed of 2.67*10-3 m/s. What is the frequency (in Hz) of the eardrum's vibration?
A 420-g ball is attached to one end of a horizontal cord of length L = 2 m and the other end is fixed, what will be its speed at the lowest point of its path
A position vector in the first quadrant has an x component of 8 m and a magnitude of 10 m. What is the value of its y component?
A 0.245 kg ball is thrown straight up from 2.20 m above the ground. Calculate the total work done by the force of gravity during that time
A 2000kg vehicle is travelling down the road at 20m/s (45 mph) when it reaches an intersection. Between rubber and dry asphalt, the coefficient of friction is 0.80. What is the minimum distance necessary for the car to stop.
A sled weighs 100N. It is held in place on a frictionless 20 degrees slope by a rope attached to a stake at the top, the rope is parallel to the slope. What is the normal force of slope acting on the sled.
An iron cube with a volume of 8.00cm^3 is submerged in ethyl alcohol, which has a density of 0.806g/cm^3. What is the volume of ethyl alcohol displaced
The dielectric strength of air, E = 3.0×106 V/m, is the maximum field that air can withstand before it breaks down and becomes conducting. How much charge can be placed on a spherical conductor
A guitar string is 91 cm long andhas a mass of 3.6 g. The distance from the bridge to the supportpost is L = 60 cm, What is the frequency of the second overtone
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