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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 300 bird flying along at 6.0 m/s sees a 7.0 g insect heading straight toward it with a speed of 25m/s (as measured by an observer on the ground, not by the bird). The bird opens its mouth wide and enjoys a nice lunch. What is the bird's speed immed..
A 65.0 kg weight watcher wishesto climb a mountain to work off the equivalent of a large piece ofchocolate cake rated at 480 (food)Calories. How high must the person climb
q1. a diffraction grating with 395 linesmm is 1.00 m in front of a screen. what is the wavelength of light whose
A high-energy pulsed laser emits a 1.5-ns-long pulse of average power 2.6×1011 W. The beam is 2.3×10?3 m in radius. Determine the rms value of the electric field
A certain star is 18.6 light-years away. How long would it take a spacecraft traveling 0.950c to reach that star from Earth, as measured by observers?
A 350kg piano slides 3.8m down a 33^\circ incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (see the figure(Figure 1) ). The effective coefficient of kinetic friction is 0.35.
A 10-cm-diameter cylinder of helium gas is 20 cm long and at 20°C. The pressure gauge reads 120 psi. how many helium atoms are in the cylinder? what is the mass of the helium?
A jeweler examines a diamond with a magnifying glass. find the angular magnification when the diamond is held 5.39cm from the magnifying glass
a particle of charge q is fixed at the origin of an xy coordinate system. at t 0 a particle m 0.771 g q 4.15 microc
a series rlc circuit consists of a 809 w resistor a 0.176 h inductor and a 55.5 mf capacitor. it is attached to a 120
An athlete runs 400m, which is exactly one loop on an Olympic stadium, making consecutive 100m distances in: 10.1, 10.3, 10.2 and 10.0s
Calculate the minimum angle above the horizontal at which Hiawatha must aim in order to outrun the arrow.
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