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Scrat [10]
3 years ago
8

Solve each problem. Be sure to show your work and give a final answer with units rounded to the given number of significant figu

res.
1) Find the voltage on a circuit with a resistance of 12.5 Ω if it has a current of 2.35 A.

2) If a circuit with a 9.0 V battery has a current of 6.2 A, how much resistance is in the circuit?

3) A circuit has three resistors with values of 4.0 Ω, 8.0 Ω, and 12 Ω. What is the equivalent resistance if they are wired in series?

4) A circuit has three resistors with values of 4.0 Ω, 8.0 Ω, and 12 Ω. What is the equivalent resistance if they are wired in parallel?
Physics
1 answer:
Alex Ar [27]3 years ago
8 0

Answer:

1. the voltage will be 2.35×12.5 = 29.4V

2. the resistance would be 9.0/6.2= 1.45ohms

3. in series they will add up thus 4+8+12= 24ohms

4. in parallel it will be 2.18ohms

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Calculate the wavelength of a photon of electromagnetic radiation with a frequency of 151.7 mhz
AlekseyPX

The wavelength of a photon of electromagnetic radiation with a frequency of 151.7 Mhz is 1.978 meter

According to the question

The frequency of a photon of electromagnetic radiation = 151.7 Mhz

By using the Formula of wavelength and frequency

λ = C/f

Where,

λ (Lambda) = Wavelength in meters

C = Speed of Light (c = 3x10⁸ m/s)

f = Frequency

Now, the wavelength of a photon of electromagnetic radiation with a frequency of 151.7 Mhz is  

1 Mhz = 1000000 Hz

151.7 Mhz = 151.7 * 10⁶ Hz

λ = C/f  

Substituting the value of C and f  

  λ =  \frac{3*10^{8} }{151.7 * 10^{6}  }

  λ = 1.978 meter

Hence,  the wavelength of a photon of electromagnetic radiation with a frequency of 151.7 Mhz is 1.978 meter

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5 0
2 years ago
A cube measures 3 cm on each side and has a mass of 25 g. What is its density.
Snowcat [4.5K]

Answer:

The density is:   0.926 \,\frac{g}{cm^3}

Explanation:

Recall that density is defined as the quotient of the object's mass divided by volume. So, we calculate the volume of the 3 cm side cube:

Vol = (3 \,cm)^3 = 27 \,\,cm^3

then the density becomes:

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4 years ago
Please can someone help?
vodomira [7]
5207 because I said so
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