3 years ago

Which of the following is a compound? Bi Np+Pu RfBh Y

Physics

1 answer:

djyliett [7]3 years ago

3 0

First One, Bi (bismuth)

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Determine the resistance of a 250-w lightbulb connected to its proper source voltage of 110 v.

ollegr [7]

1.P=UI
2.U=IR
so P=U^2/R
R=U^2/P=110*110/250=48.4ohm

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3 years ago

Which is an example of a chemical change?

Mashutka [201]

Answer:

Burning wax

Explanation:

because in burning, wax reacts with oxygen present in the surrounding and forms carbon dioxide and ash

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4 years ago

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Sunlight is made up of EM waves. True or False

GrogVix [38]

Answer:

true

Explanation:

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3 years ago

A 15-kg bicycle carrying a 50-kg boy is traveling at a speed of 5 m/s. What is the KE of the bicycle and the boy?

vovangra [49]

Together as one moving package, their mass is (15 + 50) = 65 kg.

   Kinetic energy = (1/2) (mass) (speed)²

   = (1/2) (65 kg) (5 m/s)²

   = (32.5 kg) (25 m²/s²)

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4 0

4 years ago

t requires1200 kg of coal to produce the energy needed to make 1.0 kg of aluminum metal. If a single soda can requires approxima

Lesechka [4]

Answer:

The mass of coal is 108 kg.

Explanation:

Given that,

Energy of coal = 1200 kg

Mass of aluminum = 1.0 kg

Energy required for single soda can = 15 g of Al

Energy required for 6 pack of cans = $6\times15=90\ g\ of\ Al$

We need to calculate the mass of coal

Using formula of mass

$\text{mass of coal}=\dfrac{\text{Energy of coal}\times\text{Energy required for 6 pack of cans}}{\text{Mass of aluminum}}$

Put the value into the formula

$m=\dfrac{1200\times90\times10^{-3}}{1.0}$

Put the value into the formula

$m=108\ Kg$

Hence, The mass of coal is 108 kg.

6 0

3 years ago