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3 years ago

Kate is pulling her doll in a wagon. Which arrow shows us the force of Kate pulling the wagon?

Physics

1 answer:

omeli [17]3 years ago

6 0

Answer:

Explanation:

Trust me its the right answer

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2. Which of the following is not a macromolecule?

svlad2 [7]

Answer:

Explanation:

5 0

4 years ago

Scienctists agree that the world's climate is getting hotter. What do you think might happen as a result of this climate change?

Mama L [17]

Answer:

Bad things

Explanation:

Global warming has many terrible effects on people and the earth itself

such as, death, birth defects, asthmea, breathing conditions, increased diseases.

4 0

3 years ago

If planet i is 30.3 million miles farther from the sun than planet ii, then planet iii is 24.6 million miles farther from the s

kkurt [141]

Since the total distance for all three of the planets is 196.2 million miles, you would add planet i and planet iii, then subtract that number from 196.2

planet i and planet iii equaled 54.9 million miles, that subtracted from 196.2 equals 141.3

So your answer is 141.3 million miles

3 0

3 years ago

A certain siren radiates sound uniformly in all directions. At a distance of 17 m from the siren, the intensity level is 49 db.

AveGali [126]

Answer:

The power is $P = 2.88*10^{-4 } \ W$

Explanation:

From the question we are told that

The distance from the siren is $d = 17 \ m$

The intensity level is $\beta = 49\ dB$

The threshold of hearing is $I_0 = 1.0 *10^{-12} \ W/m^2$

Generally the intensity level is mathematically represented as

$\beta = 10dB * log [\frac{I}{I_o} ]$

Where I is the intensity at which the siren radiates the sound

substituting values

$49 = 10 * log [\frac{I}{1.0 *10^{-12}} ]$

=> $I = 7.94*10^{-8} W/m^2$

Now the amount of power the siren put out is mathematically evaluated as

$P= IA$

Where A is the area of the siren which is taken as a sphere and it is mathematically evaluated as

$A = 4 \pi d^2$

$P = I * 4 \pi d^2$

substituting values

$P = 7.94 *10^{-8} * 4 * 3.142 * (17)^2$

$P = 2.88*10^{-4 } \ W$

3 0

3 years ago

Give three practical uses of electromagnets

PtichkaEL [24]

Three practical uses of electromagnets would be
Light. The waves
Electric locks. The bolts that are used by the
coils
Cranes. The electric ones that are found in
scraps
Cars computers washing machines all use
Electromagnets . Even CD players DVDs
Players

7 0

4 years ago