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vivado [14]
4 years ago
10

1.) Balance the following chemical equation: ___KOH + ___H₃PO₄ → ____K₃PO₄ + ___H₂O 2.) Balance the following chemical equation:

___Al(OH)₃ + ___HCl → ___AlCl₃ + ___H₂O 3.) Balance the following chemical equation: ___Fe₂O₃ + ___CO → ___CO₂ + ___Fe 4.) Balance the following chemical equation: ___AgI + ___Fe₂(CO₃)₃ → ___FeI₃ + ____Ag₂CO₃ There are four blanks on each and if there is no coefficient needed place a "1" in the blank

Physics
1 answer:
Akimi4 [234]4 years ago
7 0

Answer:

The first one put 1's

Explanation:

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Please answer !!!A company wants to install a sensor to monitor the light level in the offices of their buildings. The sensor co
vovikov84 [41]

Answer:

Explanation:

The sensor contains an LDR which has a resistance of 10kohlms in daylight and 100kohlms in the dark.

If the resistor in the circuit is 1 megaohlm, the total resistance in daylight and darkness will be 1.01 megaohms and 1.1 megaohlms.

The percentage difference = (1.1-1.01)/1.1*100% = 8.18%

If the resistor in the circuit is 25 kohlm, the total resistance in daylight and darkness will be 35 kohms and 125 kohlms.

The percentage difference = (125-35)/125*100% = 72%

With the input p.d to the sensing circuit fixed at 12 v, the sensing current will change according to the total resistance. A 72% difference is much more detectable. So the 25 kohm resistor is the better choice.

3 0
3 years ago
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What happens when a wave reflects?
solong [7]
They bounce off just like sun rays when they heat the atmosphere they bounce off reflection
4 0
4 years ago
Which energy transformation pops the corn kernels
Andrews [41]

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heat?

Explanation:

3 0
3 years ago
1. The head of a rattlesnake can accelerate 50.0 m/s in striking a victim. If a car could do
Maslowich

Answer: 0.492 s

Explanation:

We can use the following equation to solve this problem:

V=V_{o}+a.t

Where:

V=24.6 m/s is the car’s final velocity

V_{o}=0 m/s is the car’s initial velocity  (it starts from rest)

a=50 m/s^{2} is the car's acceleration  

t is the time we have to find

Isolating t:

t=\frac{V-V_{o}}{a}

t=\frac{24.6 m/s-0 m/s}{50 m/s^{2}}

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6 0
3 years ago
If I push on the wall with 75 Newtons of force, the wall will push back with ______
Sauron [17]

Answer:

(F)reaction = - 75 N

where, negative sign shows opposite direction.

Explanation:

This question can be answered using Newton's third law of motion. The Newton's Third Law of Motion states that for every action force there is an equal but opposite reaction force.

(F)action = - (F)reaction

Hence, in our scenario if we consider the 75 Newton force applied on the wall to be the action force then the reaction force of the wall must be equal to it in opposite direction. Therefore, the reaction push of the wall must be equal to 75 N.

<u>(F)reaction = - 75 N</u>

<u>where, negative sign shows opposite direction.</u>

6 0
3 years ago
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