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3 years ago

10

Which statement best describes what is taking place? Copper is being oxidized. Copper is being reduced. Copper is losing electro

ns. Copper is a reducing agent.

1 answer:

Rasek [7]3 years ago

3 0

Answer:

copper is being reduced

Explanation: I got 100% on the quiz good luck this class is hard lol

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One of the most difficult solar energy design problems to solve is:

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I'm not sure but i would say C.storing the heat energy.

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3 years ago

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Which of the following is a strong base?

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D. Sodium hydroxide aka naOH

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A 100-w light bulb is about 16% efficient. how many joules of heat energy are siddipated by the bulb each second

pickupchik [31]

Answer:

84 Joules are wasted per second.

Explanation:

An efficiency of 16% means 84% is wasted as heat energy.

Therefore;

For a 100W bulb;

Heat wasted = 84/100 × 100 W

= 84 W

Therefore;

84 W or 84 joules are wasted as heat per second

3 0

3 years ago

3. A thin lead apron is used to protect patients from harmful X rays. If the sheet measures 75.0 cm by 55.0 cm by 0.10 cm, and t

DanielleElmas [232]

Answer:

4.67 kg

Explanation:

Given data

Dimensions of the lead sheet: 75.0 cm by 55.0 cm by 0.10 cm

Density of lead: 11.3 g/cm³

Step 1: Calculate the volume of the sheet

The volume of the sheet is equal to the product of its dimensions.

$V = 75.0 cm \times 55.0 cm \times 0.10 cm = 413 cm^{3}$

Step 2: Calculate the mass of the sheet

The density (ρ) is equal to the mass divided by the volume.

$\rho = \frac{m}{V} \\m = \rho \times V = \frac{11.3g}{cm^{3} } \times 413cm^{3} = 4.67 \times 10^{3} g = 4.67 kg$

6 0

2 years ago

Work=? time=5s Power = 40w

antiseptic1488 [7]

Answer:

200 J

Explanation:

Work = Power x time

Work = (40w)(5s)

Work = 200 J

5 0

2 years ago