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3 years ago

14

Which sentences in this passage are true?

2 answers:

lora16 [44]3 years ago

8 0

I think that your answer should be D) the state should make use of satellites and radars because they detect when a storm is coming

Marizza181 [45]3 years ago

7 0

Finally, the state should make use of satellites and radars in the area.

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What causes air resistance when it comes to parachutes? Use ideas about particles in your answer.

Kobotan [32]

Answer:

When a parachute opens, it is a second force that works against gravity. This is air resistance. Air collects under the fabric parachute, pushing it up as gravity pulls the heavy object attached to it down. This pushing slows the fall of the object by resisting the air under the parachute.

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4 years ago

How to solve this question? The answer for A is 40kmh-1

Galina-37 [17]

Wish it'll help
If you didn't get it let me know and I'll explain it with more details (even though this one was clear enough)

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4 years ago

A wire of resistance 7 ohms and length 2.8 m is bent into a circle and is concentric with a solenoid in which the magnetic flux

Serggg [28]

Answer:

The emf, electric field and the current in the wire are 10 V, 3.57 V/m and 1.43 A.

Explanation:

Given that,

Resistance = 7 ohms

Length = 2.8 m

Time t =0.2

We need to calculate the change in magnetic flux

Using formula of induced emf

$\epsilon=\dfrac{d\phi}{dt}$

Put the value into the formula

$\epsilon=\dfrac{6-4}{0.2}$

$\epsilon=10\ V$

We need to calculate the electric field in the wire

Using formula of electric field

$E=\dfrac{V}{l}$

$E=\dfrac{10}{2.8}$

$E=3.57\ V/m$

We need to calculate the current in the wire,

Using formula of ohm's law

$V=IR$

$I=\dfrac{V}{R}$

Put the value into the formula

$I=\dfrac{10}{7}$

$I=1.43\ A$

Hence, The emf, electric field and the current in the wire are 10 V, 3.57 V/m and 1.43 A.

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3 years ago

Calculate the speed of a 3.5cm sound wave of frequency 8000Hz

LuckyWell [14K]

The answer to this question is 2400Hz

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3 years ago

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Suppose you take

kati45 [8]

Answer:

a current will be induced.

Explanation:

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3 years ago

Read 2 more answers