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g100num [7]
3 years ago
15

In a building with 10.000 cubic feet where the air changes every two hours, what the rate of air change? A. 167.7 cfm B. 83.3 cf

m C. 133.3 cfm D. 50 cfm
Physics
2 answers:
stepladder [879]3 years ago
3 0

Answer:

B. 83.3 cfm

Explanation:

given that the rate of change is,

= 10000 ft³ per 2 hour  (note 2 hours = 60 min x 2 = 120 min)

=  10000 ft³ per 120 min

= 10000 / 120  ft³ per min

= 83.3 ft³ per min

PolarNik [594]3 years ago
3 0
The answer is b I hope it helps
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a solid weighs 18.36N on the surface of the moon. The force of gravity on the moon is 1.7Nkg-1. Determine the mass of the solid​
Karo-lina-s [1.5K]

Answer:

mass of the solid is 10.8kg

Explanation:

Weight of the solid=w=18.36N

Force of gravity on the surface of the moon=g=1.71Nkg^-1

Mass of the solid on the moon=m=?

as we know that

weight=mass×force of gravity

here we have to find the mass

\frac{weight}{force of gravity}=mass

mass=\frac{18.36N}{1.7Nkg^-1}

Mass of the solid=10.8kg

i hope it will help you

7 0
3 years ago
How do abiotic and biotic factors in Mono Lake compare to those in the ecosystem in which you live?
Arturiano [62]

Answer:

Biotic factors are the living component of an environment while abiotic factors are the non living component of an environment.

Biotic factors of Mono lake include plants, animals, fungi, algae and bacteria

Abiotic factors of Mono lake include sunlight, temperature, moisture, wind or water currents, soil type, and nutrient availability.

While the biotic and abiotic factors on Land inhabited by humans including Me are :

Biotic factors-Plants ,animals, bacteria

Abiotic factors-Sunlight, heat/ temperature, Climate, weather, water sources.

7 0
3 years ago
Find the deceleration of<br> a cyclist who comes to<br> rest from 10m/s in 2<br> seconds.
I am Lyosha [343]

Answer:

-5 m/s^2

Explanation:

10/2=5 and is is a stop so it is negitive

5 0
3 years ago
Two 10-cm-diameter charged rings face each other, 25 cm apart. The left ring is charged to ? 25 nC and the right ring is charged
MArishka [77]

Answer:

A)   E = 0N/C

B)   0i + 0^^j

C)   F = 0N

D)   0^i  + 0^j

Explanation:

You assume that the rings are in the zy plane but in different positions.

Furthermore, you can consider that the origin of coordinates is at the midway between the rings.

A) In order to calculate the magnitude of the electric field at the middle of the rings, you take into account that the electric field produced by each ring at the origin is opposite to each other and parallel to the x axis.

You use the following formula for the electric field produced by a charge ring at a perpendicular distance of r:

E=k\frac{rQ}{(r+R^2)^{3/2}}               (1)

k: Coulomb's constant = 8.98*10^9Nm^2/C

Q: charge of the ring

r: perpendicular distance to the center of the ring

R: radius of the ring

You use the equation (1) to calculate the net electric field at the midpoint between the rings:

E=k\frac{rQ}{(r^2+R^2)^{3/2}}-k\frac{rQ}{(r^2+R^2)^{3/2}}=0\frac{N}{C}

The electric field produced by each ring has the same magnitude but opposite direction, then, the net electric field is zero.

B) The direction of the electric field is 0^i + 0^j

C) The magnitude of the force on a proton at the midpoint between the rings is:

F=qE=q(0N/C)=0N

D) The direction of the force is 0^i + 0^j

6 0
3 years ago
Which is a property that mendeleev predicted for gallium
seropon [69]
A; Metal This is because of maths
8 0
4 years ago
Read 2 more answers
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