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lozanna [386]
3 years ago
13

Material A has a higher thermal conductivity than Material B. Which material will transfer energy by conduction faster?​

Physics
1 answer:
AlladinOne [14]3 years ago
7 0

Answer: a

Explanation:

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A car travels from point A to point B, moving in the same direction but with a non-constant speed. The first half of the distanc
Dmitrij [34]

Answer:

Explanation:

From A to B

distance traveled with velocity v_1  in time t_1

\frac{d}{2}=v_1t_1----1

from B to C

distance traveled is 0.5 d with v_2  and v_3  velocity for half-half time

\frac{d}{2}=\frac{v_2t_2}{2}+\frac{v_3t_3}{2}----2

divide 1 and 2 we get

\frac{1}{1}=\frac{2v_1t_1}{v_2t_2+v_3t_3}

\frac{t_1}{t_2}=\frac{v_2+v_3}{2v_1}

Now average velocity is given by

v_{avg}=\frac{d}{t_1+t_2}

taking t_1  common

v_{avg}=\frac{2v_1t_1}{t_1(1+\frac{t_2}{t_1})}

v_{avg}=\frac{2v_1}{1+\frac{2v_1}{v_2+v_3}}

v_{avg}=\frac{2v_1(v_2+v_3)}{2v_1+v_2+v_3}  

6 0
4 years ago
Katrina inserts a key into her car’s ignition. She turns the key, putting her car into ignition mode. In this mode, some energy
Anestetic [448]

Answer: The option (C) is correct.

Explanation:

Ignition is the process in which the fuel is made to start burn. In car's ignition, it is the part where the key is turned so that the engine may get start.

The fossil fuel which is used in the car's engine is petroleum. Therefore, the chemical energy is used to allow the fuel to burn and move the car.

4 0
3 years ago
Read 2 more answers
Are the stack temperature and oxygen reasonable for these operating conditions? if not, what oxygen and stack temperature would
Anton [14]

Stack temperatures typically range from 350 to 450 degrees Fahrenheit. A 2.5% efficiency loss occurs for every 100 degrees over that temperature. The majority of buildings schedule annual boiler cleanings at regular intervals, but if you see those figures rise, it's time for a cleaning.

Excess air is required to completely burn the fuel since the air and fuel cannot combine exactly in a burner. Additionally, any leaks in the heater will draw air into the firebox that doesn't pass through the burners since the furnace or boiler firebox operates at a little negative gauge pressure. Fuels that are gaseous, like natural gas, burn more readily than fuels that are liquid or solid. Depending on the fuel type, different surplus air requirements will apply.

Learn more about temperature here-

brainly.com/question/15267055

#SPJ4

3 0
1 year ago
Electric current passing through a human body can be dangerous, even fatal, depending on the amount of current, the duration of
Sati [7]

Answer:

V for dry skin = 41.83 volts

V for wet skin = 0.196 volts

Explanation:

The relationship between current and voltage is given as follows by Ohm's Law:

V = IR

where,

V = voltage

I = Current

R = Resistance

FOR DRY SKIN:

V = Vd = ?

I = 89 μA = 89 x 10⁻⁶ A

R = 4.7 x 10⁵ Ω

Therefore,

Vd = (89 x 10⁻⁶ A)(4.7 x 10⁵ Ω)

<u>Vd = 41.83 volts</u>

FOR WET SKIN:

V = Vw = ?

I = 89 μA = 89 x 10⁻⁶ A

R = 2200 Ω

Therefore,

Vd = (89 x 10⁻⁶ A)(2200 Ω)

<u>Vd = 0.196 volts</u>

7 0
4 years ago
Which statement correctly describes the formation of an electric current? A resistance causes electric charges to move from lowe
goldfiish [28.3K]

Answer:

.

Explanation:

4 0
3 years ago
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