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12345 [234]
3 years ago
15

Calculate the density of water in kg/m3. Express your answer in kilograms per cubic meter using three significant figures.

Physics
1 answer:
Svet_ta [14]3 years ago
8 0

Answer:

This question appear incomplete

Explanation:

This question appear incomplete. However, the density of water is generally known to be 997 kg/m³. The formula used to determine density is mass ÷ volume. In the case of the density of water, the mass is measured in kilograms (kg) while the volume is measured in cubic meter (m³).

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Alkali metals are extremely reactive because they a. have very small atomic masses. b. are not solids at room temperature.
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Answer:

a.

Explanation:

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State some important uses of magnet​
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Use of magnet:

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3 years ago
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What happens too baking soda when you heat it up?
Fantom [35]
Salutations!

What happens to baking soda when you heat it up!

When you heat up baking soda, it loses carbon dioxide which tends to crest bubbles. This is what makes it quite light and fluffy.

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4 0
3 years ago
Assume that the pictured magnet is being moved into the solenoid. If the polarity of the magnet is reversed and then moved into
dangina [55]

Answer:

The direction of the induced emf is revered, and hence the direction of the induced current.

Explanation:

When the polarity of the magnet is revered, the direction of the magnetic field is also reversed, and therefore, according to Faraday's law

\varepsilon = NA\dfrac{dBcos(\theta)}{dt}

\varepsilon = -NA\dfrac{dBcos(\theta)}{dt}

since the magnetic field changes sign from B to -B.

Hence, the effect is that the direction of the emf induced is reversed, which also reverses the direction of the induced current in the solenoid.

P.S:<em> The cause of confusion here is the direction of magnetic field lines from the magnetic</em>, and so you must remember that <em>field lines begin at the north pole and end at the south pole.</em>

4 0
3 years ago
An airplane traveling 245 m/s east experiences turbulence, so the pilot slows down to 230 m/s. It takes the pilot 7
USPshnik [31]

Answer:

The acceleration of the plane is -2.14 m/s² ⇒ 2nd answer

Explanation:

<u><em>Acceleration</em></u> is the rate of change of velocity

The unit for acceleration is meters per second square

The rule of the acceleration is: → a=\frac{v-u}{t}

where a is the acceleration, u is the initial velocity, v is the final velocity

and t is the time

An airplane traveling 245 m/s east experiences turbulence so the pilot

slows down to 230 m/s

It takes the pilot 7  seconds to slow down to this speed

We need to find the acceleration of the plane

Lets use the rule above

→ u = 245 m/s , v = 230 m/s , t = 7 seconds

→ a=\frac{230-245}{7}

→ a=\frac{-15}{7}=-2.14

→ The acceleration is -2.14 m/s²

<em>The acceleration of the plane is -2.14 m/s²</em>

5 0
3 years ago
Read 2 more answers
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