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3 years ago

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SONAR stands for "sound navigation and ranging,” and it is used to map and explore the ocean floor.

1 answer:

lara31 [8.8K]3 years ago

3 0

SONAR stands for "sound navigation and ranging,” and it is used to map and explore the ocean floor.

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A child of mass 25 kg is skating fast, +10 m/s, and tries to get revenge by colliding with the 60 kg adult who is sitting still.

tankabanditka [31]

Answer: -4.4 m/s

Explanation:

This problem can be solved by the Conservation of Momentum principle, which establishes that the initial momentum $p_{o}$ must be equal to the final momentum $p_{f}$ :

$p_{o}=p_{f}$ (1)

Where:

$p_{o}=m_{1}V_{o}+m_{2}U_{o}$ (2)

$p_{f}=m_{1}V_{f}+m_{2}U_{f}$ (3)

$m_{1}=25 kg$ is the mass of the child

$V_{o}=10 m/s$ is the initial velocity of the child

$m_{2}=60 kg$ is the mass of the adult

$U_{o}=0 m/s$ is the initial velocity of the adult (it is sitting still)

$V_{f}$ is the final velocity of the child

$U_{f}=6 m/s$ is the final velocity of the adult

Substituting (2) and (3) in (1):

$m_{1}V_{o}+m_{2}U_{o}=m_{1}V_{f}+m_{2}U_{f}$ (4)

Isolating $V_{f}$ :

$V_{f}=\frac{m_{1}V_{o}-m_{2}U_{f}}{m_{1}}$ (5)

$V_{f}=\frac{(25 kg)(10 m/s)-(60 kg)(6 m/s)}{25 kg}$ (6)

Finally:

$V_{f}=-4.4 m/s$ This means the velocity of the child is in the opposite direction

4 0

3 years ago

A 25 kg cart has 125 kg*m/s of momentum. How fast is the car going?

PSYCHO15rus [73]

Therefore, the car is moving with a velocity of 5 m/s.

7 0

3 years ago

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What are the components of a vector with a magnitude of 4.00 and a direction of -112°?

zzz [600]

Answer: (-1.50 -3.71)

Explanation:

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3 years ago

What makes up a compound?

iVinArrow [24]

A
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7 0

2 years ago

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Rama09 [41]

The amount of NOx emission produced by a household is required.

The total amount of NOx the household is responsible for is 91.06 kg.

1 car produces 11 kg of NOx per year.

Natural gas burning produces 4.3 g of NOx per therm.

Electric power plant produces 7.1 g of NOx per kwh.

2 cars will produce $2\times 11=22\ \text{kg}$ of NOx.

1200 therms of natural gas will produce $1200\times 4.3=5160\ \text{g}$

9000 kWh will produce $7.1\times 9000=63900\ \text{g}$

Converting all to kg and finding the total amount

$22+5.16+63.9=91.06\ \text{kg}$

The total amount of NOx the household is responsible for is 91.06 kg.

Learn more:

brainly.com/question/23262386

brainly.com/question/12707452

6 0

3 years ago