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3 years ago

In order to produce an electric current in a coil of wire , a magnet field through the coil must be

Chemistry

2 answers:

Nataly_w [17]3 years ago

8 0

Answer:

moving

Explanation:

IRINA_888 [86]3 years ago

6 0

Answer:

magnet field must also be around the same coil to produce current

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Explain why water does not heat up or cool off as quickly as air does.

lakkis [162]

No, water does not heat up or cool down faster than soil. This is because soil has lower specific heat. Specific heat is how long it takes for a substance to heat up or cool down

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3 years ago

What would be an advantage and a disadvantage to using litmus as a titration indicator???

lesantik [10]

To indicate whether the elements is basic or acid by changing of colour.(advantage)
can give out bad gas which can cause suffocate to the people.(disadvantage).

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3 years ago

0. Give an example of how an organism can use surface tension.

Lady_Fox [76]

Answer:

In case of plants surface tension help to support the transpiration pull.

Explanation:

Surface tension is a force that hold the molecules in the surface to minimize the surface area.

During evaporation of excess amount of water from the stomata of leaves of plants by transpiration a surface tension is generated.

The generated surface tension helps to maintain the water column within the xylem tissue by the absorption of water from the soil by the roots.

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3 years ago

How many amperes would be needed to produce 60.0 grams of magnesium during the electrolysis of molten mgcl 2 in 2.00 hours?

Shalnov [3]

Answer:

$\boxed{\text{66.2 A}}$

Explanation:

1. Write the equation for the reaction.

M_r: 24.30

MgCl₂ ⟶ Mg + Cl₂

m/g: 60.0

2. Calculate the moles of Mg

Moles of Mg = 60.0 g Mg × (1 mol Mg/ 24.30 g Mg) = 2.469 mol Mg

3. Calculate the moles of electrons

Moles of electrons = 2.469 mol Mg × (2 mol electrons/1 mol Mg)

= 4.938 mol electrons

4. Calculate the number of coulombs

Q = 4.938 mol electrons × (96 485 C/1 mol electrons) = 476 500 C

5. Calculate the current required

Q = It

I = Q/t

t = 2.00 h × (60 min/1h) × (60 s/1 min) = 7200 s

I = 476 500 C/7600 s= 66.2 C/s = 66.2 A

You need a current of $\boxed{\textbf{66.2 A}}$ .

8 0

4 years ago

As photosynthesis occurs in chloroplasts, O2 is produced from _____ via a series of reactions associated with _____. View Availa

Monica [59]

Answer:

H₂O, Photosystem II

Explanation:

Photosynthesis is the process that enables autotrophs such as green plants and algae to generate food using water, carbon dioxide and energy from the sun.
It occurs in two phases, that is, the light-dependent phase and the light-independent phase.
During photosystem II energy from the sun is used to break-down water molecules to yield oxygen and hydrogen ions. Oxygen is released away to the atmosphere while hydrogen ions are used in the next phase to generate ATP molecules.

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4 years ago