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3 years ago

9

An object has an acceleration of 6m/s/s. If the net force was tripled and the mass was doubled, then the new acceleration would

be

1 answer:

Vaselesa [24]3 years ago

5 0

Acceleration = Force / mass
New acceleration = 3F / 2m = 1.5 x the old acc = 9 m/s/s

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How is sound produced by using pipel wind instruments

AlekseyPX

The air inside the pipes of a wind instrument vibrates. ... The result is longitudinal standing waves in the air column inside the pipe. The ends, whether open or closed, create nodes or antinodes in these standing waves.

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3 years ago

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A comet with a mass of 7.85 × 1011 kg is moving with a velocity of 25,000 m/s. calculate its kinetic energy.

Nadusha1986 [10]

The kinetic energy of an object is given by:
$K= \frac{1}{2}mv^2$
where
K is the kinetic energy
m is the mass of the object
v is its velocity.

The comet in our problem has a mass of $m=7.85 \cdot 10^{11} kg$ and a velocity of $v=25000 m/s$ , so its kinetic energy is:
$K= \frac{1}{2}(7.85 \cdot 10^{11} kg)(25000 m/s)^2=2.45 \cdot 10^{20}J$

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3 years ago

A particular spherical-shaped fruit has a spherical seed, and the rest of the fruit is edible. The radius of the fruit is 3 time

notsponge [240]

Answer:

<u>2600 cubic centimeters</u>

Explanation:

Volume of the edible fruit is equal to :

⇒ Volume (fruit) - Volume (seed)

⇒ 4/3π(3r)³ - 4/3πr³

⇒ 27 x 4/3πr³ - 4/3πr³

⇒ 100 (27 - 1)

<u>⇒ 2600 cubic centimeters</u>

8 0

2 years ago

The mass of a glass beaker is known to be 24.2 g. Approximately 5 mL of water are added, and the mass of the beaker and water is

Kamila [148]

Answer: 2 significant figures in 6.4

Explanation:

Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.

Rules for significant figures:

Digits from 1 to 9 are always significant and have infinite number of significant figures.

All non-zero numbers are always significant. For example: 654, 6.54 and 65.4 all have three significant figures.

All zero’s between integers are always significant. For example: 5005, 5.005 and 50.05 all have four significant figures.

All zero’s preceding the first integers are never significant. For example: 0.0078 has two significant figures.

All zero’s after the decimal point are always significant. For example: 4.500, 45.00 and 450.0 all have four significant figures.

Mass of beaker = 24.2 g

Mass of beaker + mass of water = 30.625 g

Mass of water = 30.625 - Mass of beaker = 30.625 - 24.2 = 6.4g

The rule apply for the addition and subtraction is :

The answer would contain same number of decimal places as there are in the least precise number present.

Thus there are 2 significant figures in mass of water which is 6.4 grams.

7 0

3 years ago

Please help. what's the answer??

Anvisha [2.4K]

I THINK it is C. KEYWORD is THINK

5 0

3 years ago