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Alex_Xolod [135]
3 years ago
13

Three resistors are connected in series. What is the total resistance in the circuit if the current that flows through the wires

is 2.0 A and the voltage provided by the battery is 12 V?
Assume the resistors in the above problem are replaced with light bulbs. Which of the following circuit modifications will cause the light bulbs to be brighter?

a. Rewire the light bulbs so that they are in parallel instead of in series
b. Decrease the resistance of the light bulbs
c. Increase the voltage supplied by the battery by adding a battery
d. All of the above choices are correct
Physics
1 answer:
sleet_krkn [62]3 years ago
7 0
What is one effect of steroid abuse in professional sports?
AThey cause athletes to stop training hard incorrect answer
BThey allow some competitors to gain an unfair advantage incorrect answer
CThey cause athletes to stop competing to win incorrect answer
DThey cause athletes to become selfish
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How are cactus adapted to survive in deserts?
andreev551 [17]

1. They have evolved their leaves into spikes for minimum water loss through transpiration.

2. They have a waxy layer for minimum water loss.

3. They have thick walls for minimum water loss.

4. They can take water from atmosphere.

5. They change the photo energy from Sun into an intermediate stage and store it, so that they can make food even in night.

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2 years ago
Joaquin has hockey practice at the same ice rink where Alton has curling practice. One day, they were both playing on the ice wi
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the puck recoils in each case.

larger mass stone gives puck greater recoil, smaller stone, smaller recoil

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3 years ago
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A magnet has ___________ poles. Like poles__________each other and unlike poles __________. An electromagnet is used to separate
Stels [109]

Answer:

2 repel attracts light water

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2 years ago
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If the humidity in a room of volume 410 m3 at 25 ∘C is 70%, what mass of water can still evaporate from an open pan? Express you
Keith_Richards [23]

Answer:

m=1864.68\ g

Explanation:

Given:

volume of air in the room, V=410\ m^3

temperature of the room, T=25+273=298\ K

<u>Saturation water vapor pressure at any temperature T K is given as:</u>

<u />p_{sw}=\frac{e^{(77.3450 + 0.0057\times T - \frac{ 7235}{T}  )}}{T^{8.2}}<u />

putting T=298 K we have

p_{sw}=3130\ Pa

<u>The no. of moles of water molecules that this volume of air can hold is:</u>

Using Ideal gas law,

P.V=n.R.T

n=\frac{P_{sw}.V}{R.T}

n=\frac{3130\times 410}{8.314\times 298}

n=518\ moles is the maximum capacity of the given volume of air to hold the moisture.

Currently we have 80% of n, so the mass of 20% of n:

m=(20\%\ of\ n)\times M}

where;

M= molecular mass of water

m=0.2\times 518\times 18

m=1864.68\ g is the mass of water that can vaporize further.

3 0
3 years ago
Ann is driving down a street at 61 km/h.
Wittaler [7]

Answer:

12.267 seconds approximately.

Explanation:

The units can be simplified into m/s, in which case you would have 61000/3600. Simplify that to 16 and 17/18. This is your meters per second, so multiply that by .724 to get the answer.

4 0
3 years ago
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