3 years ago

a concave mirror has a focal length of 18 cm. where will an image form if an object is placed 58 cm from the mirror

Physics

1 answer:

MAXImum [283]3 years ago

8 0

Answer:

here

Explanation:

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How much heat is needed to raise the temperature of a 100.0g of water by 85.0 c?

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35.7kJ

Explanation:

we can calculate the amount of heat energy required , using this formula

Q = mcθ

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Q = heat energy (Joules, J)

m = mass of a substance (kg)

c = specific heat capacity (units $Jkg^{-1} C^{-1}$ )

θ = change in temperature (Celcius,C or Kelvin K)

Assume Specific heat capacity (c) of water = $4200Jkg^{-1} C^{-1}$

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