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ollegr [7]
3 years ago
13

Please help, I am stumped.

Physics
2 answers:
ehidna [41]3 years ago
6 0

30 is the correct answer your looking for


Ivahew [28]3 years ago
4 0

Answer: A) 30 grams

Explanation: According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants.

mass of reactants= mass of antacid + mass of water= 30 g+ 50 g= 80 g

Given : Mass of product = 50 g

But mass of products should be equal to mass of reactants = 80 g

Thus mass of another product= (80-50)g = 30 g.

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Which statement best describes perigee? A) The closest point in Earth's orbit of the Sun. B) The farthest point in the Moon's or
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From a vantage point very close to the track at a stock car race, you hear the sound emitted by a moving car. You detect a frequ
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Answer:

55.8 m/s

Explanation:

f = Actual frequency of sound emitted by car

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Frequency observed is given as

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The voltage across the terminals of a generator is 5.7 v when it supplies a current of 0.3 A. It becomes 5.1 V when I=0.9A. Find
snow_tiger [21]

Answer:

  • The emf of the generator is 6V
  • The internal resistance of the generator is 1 Ω

Explanation:

Given;

terminal voltage, V = 5.7 V, when the current, I = 0.3 A

terminal voltage, V = 5.1 V, when the current, I = 0.9 A

The emf of the generator is calculated as;

E = V + Ir

where;

E is the emf of the generator

r is the internal resistance

First case:

E = 5.7   + 0.3r -------- (1)

Second case:

E = 5.1 + 0.9r -------- (2)

Since the emf E, is constant in both equations, we will have the following;

5.1 + 0.9r = 5.7   + 0.3r  

collect similar terms together;

0.9r - 0.3r = 5.7 - 5.1

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r = 0.6/0.6

r = 1 Ω

Now, determine the emf of the generator;

E = V + Ir

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E = 5.1 + 0.9

E = 6 V

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