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gavmur [86]
3 years ago
8

Which direction does air flow? A. Low to high B. High to low

Physics
2 answers:
Elanso [62]3 years ago
8 0

Answer:

air goes low to high

Explanation:

heat rises

notsponge [240]3 years ago
7 0
The answer is B



Air pressure decreases with increasing altitude and fluctuates across Earth's surface due to differences in land elevation. At the Earth's surface, wind blows horizontally from high pressure to low pressure areas. The speed is determined by the rate of air pressure change, or gradient, between the two pressure areas.

Hope this helps! <3
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Explain how neurons convey information using both electrical and chemical signals.
8090 [49]

Answer:

Explanation:

Neurons communicate via both electrical signals and chemical signals. The electrical signals are action potentials, which transmit the information from one of a neuron to the other; the chemical signals are neurotransmitters, which transmit the information from one neuron to the next.

The electrical signal travels down the axon to the axon terminals where it tells the vesicles to release the neurotransmitters into the synaptic cleft which travel to the receptors of the receiving cell which releases the second messengers

6 0
3 years ago
A weightlifter presses a 400 n weight 0.5 m over his head in 2 seconds, what is the power of the weight lifter
Scrat [10]
There are two ways to solve this problem. First we write the given.

Given: Force F = 400 N;  Height h = 0.5 m;  Time t = 2 s

Formula: P = W/t;  but Work W = Force x distance or W = f x d
 
Weight is also a Force, therefore:  W = mg, solve for Mass m = ?

m = w/g  m = 400 N/9.8 m/s²  m = 40.82 Kg

P = W/t = F x d/t  = mgh/t  P = (40.82 Kg)(9.8 m/s²)/2 s  

P = 100 J/s or 100 Watts

3 0
3 years ago
We go out to sunbathe on a warm summer day. If we soak up 80 British thermal units per hour​ [BTU/h] of​ energy, how much will t
Jlenok [28]

Answer:

0.62127°C

Explanation:

1\ BTU=1055\ J

80\ BTU/h=80\times 1055=84400\ J/h

Heat absorbed by body in 2 hours

Q=84400\times 2\\\Rightarrow Q=168800\ J

m = Mass of person = 65000 g

c = Specific heat of water = 4180 J/kg°C

\Delta T = Change in temperature

Heat is given by

Q=mc\Delta T\\\Rightarrow 168800=65\times 4180\times \Delta T\\\Rightarrow \Delta T=\dfrac{168800}{65\times 4180}\\\Rightarrow \Delta T=0.62127\ ^{\circ}C

The increase in temperature will be 0.62127°C

7 0
3 years ago
Two resistors of 2 ohms each are connected in parallel, another resistor of 1 ohm is connected in series with the parallel combi
insens350 [35]

Answer:

The power dissipated in either one of the parallel resistors is 2 V

Explanation:

Given;

two parallel resistors, R₁ and R₂ = 2 ohms

The total resistance of the Two resistors of 2 ohms connected in parallel is;

R_T = \frac{R_1R_2}{R_1+R_2} = \frac{2*2}{2+2} = \frac{4}{4} = 1 \ ohm

when connected to another resistor  of 1 ohm in series, the total resistance becomes;

Rt = R₁ + R₂

Rt = 1 + 1 = 2 ohms

Current in the circuit, I = voltage / total resistance

                                      = 2 /2 = 1 A

the overall circuit has been resolved to series connection, and current flow in series circuit is constant.

Power = I²R

Thus,  power dissipated in either one of the parallel 2 ohms resistors is;

Power = I²R = (1)² x 2 = 2 V

3 0
3 years ago
SOMEONE HELP PLEASE SORRY
evablogger [386]

Answer:

Just red light is reflected. Even if you shine a red laser at a blue piece of paper, only red light is reflected. ... The dot you see will probably always be red. If you do this in a bright room, you might trick yourself.

Explanation:

3 0
3 years ago
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