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3 years ago

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Dylan is set to receive a football kickoff. After being kicked, the ball goes up to a height of 55m before starting back down. H

ow much time does he have before the ball comes back down?

2 answers:

Georgia [21]3 years ago

6 0

Answer:

Explanation:

Yanka [14]3 years ago

3 0

Answer:

There was no anwser

Explanation:

because dylan did not anwser

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A solenoid 91.0 cm long has a radius of 1.50 cm and a winding of 1300 turns; it carries a current of 3.60 A. Calculate the magni

irinina [24]

The magnitude of the magnetic field inside the solenoid is $6.46 \times 10^{-3} \ T$ .

The given parameters;

<em>length of the solenoid, L = 91 cm = 0.91 m</em>
<em>radius of the solenoid, r = 1.5 cm = 0.015 m</em>
<em>number of turns of the solenoid, N = 1300 </em>
<em>current in the solenoid, I = 3.6 A</em>

The magnitude of the magnetic field inside the solenoid is calculated as;

$B = \mu_0 nI\\\\B = \mu_o(\frac{ N}{L} )I\\\\$

where;

$\mu_o$ is the permeability of frees space = 4π x 10⁻⁷ T.m/A

$B = (4\pi \times 10^{-7}) \times (\frac{1300}{0.91} ) \times 3.6\\\\B = 6.46 \times 10^{-3} \ T$

Thus, the magnitude of the magnetic field inside the solenoid is $6.46 \times 10^{-3} \ T$ .

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2 years ago

Voltage needed to raise current to 3.75a using 20,20,200 resistor set

Varvara68 [4.7K]

<u>Answer:</u> The voltage needed is 35.7 V

<u>Explanation:</u>

Assuming that the resistors are arranged in parallel combination.

For the resistors arranged in parallel combination:

$\frac{1}{R}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}$

We are given:

$R_1=20\Omega\\R_2=20\Omega\\R_3=200\Omega$

Using above equation, we get:

$\frac{1}{R}=\frac{1}{20}+\frac{1}{20}+\frac{1}{200}\\\\\frac{1}{R}=\frac{10+10+1}{200}\\\\R=\frac{200}{21}=9.52\Omega$

Calculating the voltage by using Ohm's law:

$V=IR$ .....(1)

where,

V = voltage applied

I = Current = 3.75 A

R = Resistance = $9.52\Omega$

Putting values in equation 1, we get:

$V=3.75\times 9.52\\\\V=35.7V$

Hence, the voltage needed is 35.7 V

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2 years ago

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Identify the name of the most common substance found in the Ocean

katen-ka-za [31]

Answer:

Explanation:

Salt

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3 years ago

1/A ball is dropped from the top of a building. After 3 seconds, its speed is measured to be 29.4 m/s. Calculate the acceleratio

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Answer:

9.8

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2 years ago

The force vector A has components Ax = 5 N, Ay = -3 N. The force vector B has

jeka94

Answer:

In the picture.

Explanation:

I hope that it's a clear solution.

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2 years ago