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3 years ago

8

The specific heat of water is 4.19 x 103 J/kg°C. How much energy will it take to raise the temperature of 0.5 kg of water by 2 d

egrees?

1 answer:

fredd [130]3 years ago

5 0

Energy required = mass x specific heat x temperature difference
= 0.5 x 4.19x10^3 x 2
= 4190J

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A compound microscope is made with an objective lens (f0 = 0.900 cm) and an eyepiece (fe = 1.10 cm). The lenses are separated by

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3 years ago

A horizontal spring with stiffness 0.4 N/m has a relaxed length of 11 cm (0.11 m). A mass of 21 grams (0.021 kg) is attached and

riadik2000 [5.3K]

Answer:

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Explanation:

k = spring constant of the spring = 0.4 N/m

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Using conservation of energy

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4 years ago

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goblinko [34]

We have that the instantaneous velocity of the shuttlecock when it hits the ground is

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From the question we are told

Assuming the acceleration is still -9.81 m/s2, what is the instantaneous velocity of the

shuttlecock when it hits the ground? Show your work below.

Generally the equation for acceleration is mathematically given as

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Where

acceleration is still -9.81 m/s2,

Hence,

$V^2-U^2=2(-9.81)*-H$

Therefore

$V_{int}=\sqrt{U^2+19.6H}$

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3 years ago