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Wittaler [7]
4 years ago
5

How to calculate ?Help!!!

Physics
1 answer:
Alona [7]4 years ago
6 0
How to calculate what?
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- Gas central heating is used for 5 days, using 102 kWh of energy. If 1 kWh of gas costs 7p, calculate the cost of using the cen
melamori03 [73]

Answer:

Explanation:

Given that,

Gas central heating was used for 5days

At a rate of 102kWh of energy

Then, 1 kWh = 7p

So,

The total time is 5days

t = 5days

1 day = 24hours

Then, t = 5days = 5 × 24 = 120hours

Given 102kWh, then, they consumers 102 kW in one hour, then, for the 120hours,

The total energy used is 102 × 24

Then, total energy = 2448 kWh

So, 1 kWh = 7p,

Then, 2448 kWh = 7 × 2448

2448 kWh = 17,136 p.

So, the cost of the using central heat is 17,136 p

6 0
3 years ago
PT7 what does ";" mean??
IceJOKER [234]

Answer: do

Explanation:

6 0
3 years ago
Read 2 more answers
A normal human heart, beating about once per second, creates a maximum 4.00 mV 4.00 mV potential across 0.250 m 0.250 m of a per
ElenaW [278]

Answer:

1) maximum electric field strength = 0.016 V/m

2)maximum magnetic field strength = 5.33 x 10^(-11) T

3) wavelength = 3 x 10^(8)m

Explanation:

A) We are given;

Frequency (f) = 1 Hz

Maximum Potential ΔV = 4 mV = 4 x 10^(-3) V

Length; d = 0.25 m

Now, maximum potential formula is given as;

ΔV = E_o•d

Where E_o is maximum electric field strength.

Thus,

E_o= ΔV/d = (4 x 10^(-3))/0.25 = 0.016 V/m

B) The maximum magnetic field strength is given by;

B_o = E_o/c

Where;

c is speed of light = 3 x 10^(8)

B_o is maximum magnetic field strength

Thus,

B_o = 0.016/(3 x 10^(8)) = 5.33 x 10^(-11) T

C) Speed of any electromagnetic wave is given by;

c = fλ

Where;

f is frequency

λ is wavelength

c is speed of light = 3 x 10^(8)

Thus, making λ the subject,

λ = c/f

λ = (3 x 10^(8))/1 = 3 x 10^(8)m

8 0
4 years ago
What can you do to mitigate these risks?
andrey2020 [161]

Answer: your question is incomplete, however I want you to know that there are four ways to mitigate a risk, these are:

avoid, accept, reduce/control, or transfer. Whatever the risk in your question is, it will definitely fit into any of the aforemened risk strategies.

7 0
3 years ago
If we can measure the period of a star's wobble caused by an orbiting planet, we know the _______.
Stells [14]
You would know the period of the planets orbit.
3 0
3 years ago
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