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nikdorinn [45]
3 years ago
10

Which of the following objects conducts heat the best?

Physics
1 answer:
Ivanshal [37]3 years ago
6 0
A metal spoon is the best conductor, but a hot air balloon would conduct more heat than a metal spoon.
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A5.0 kg TNT explosive, initially at rest, explodes into two pieces. One of the pieces weighing 2.0 kg flies off to
nordsb [41]

Answer:

v = 24 m/s, rightwards

Explanation:

Given that,

The mass of TBT explosive = 5 kg

It explodes into two pieces.

One of the pieces weighing 2.0 kg flies off to  the left at 36 m/s. Let left be negative and right be positive.

The law of conservation of momentum holds here. Let v be the final speed of the remaining piece. So,

5\times 0=2\times (-36)+3\times v\\\\-72=-3v\\\\v=24\ m/s

So, the final speed of the remaining piece is 24 m/s and it is in the right direction.

4 0
3 years ago
When a 440-Hz tuning fork and a piano key are struck together, five beats are heard. If the pitch of the note on the piano is lo
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The frequency would also be lower
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Which material has the highest melting point?
Arturiano [62]
Carbon at 3500 degrees
5 0
3 years ago
4. A small rocket with a mass of 2000 g (hint: grams) accelerates at 8.3 m/s/s as it launches into the sky. How much force is ac
GrogVix [38]

Answer:

16.6N

Explanation:

Given parameters:

Mass of rocket  = 2000g  = 2kg

Acceleration  = 8.3m/s²

Unknown:

Force acting on the rocket  = ?

Solution:

The force acting on a body can be derived from the product of its mass and acceleration;

  Force  = mass x acceleration

Insert the parameters and solve;

  Force  = 2 x 8.3  = 16.6N

5 0
3 years ago
Pleaseee helpppp meeeeeee I will give pountsss
MrRa [10]

Answer:

<h3>8. </h3>

m= 0. 113 kg

W = 1.1074 N

g = 9.8 m/ s²

<h3>9. </h3>

m= 870 kg

W = 8526 N

g = 9.8 m/s²

<h3>10.</h3>

a) weight on earth:

weight = mass × acceleration due to gravity (g)

<em>g</em><em> </em><em>on</em><em> </em><em>earth</em><em> </em><em>=</em><em> </em><em>9</em><em>.</em><em>8</em><em> </em><em>m</em><em>/</em><em>s</em><em>²</em>

W = 75 × 9.8

<u>W</u><u> </u><u>= </u><u>7</u><u>3</u><u>5</u><u> </u><u>N</u>

b) g on Mars

285 = 75 × g

g = 285/ 75

<u>g = 3.8 m/ s²</u>

3 0
3 years ago
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