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solong [7]
3 years ago
12

Which one is made up of one or more molecules

Physics
1 answer:
zmey [24]3 years ago
3 0
Ok so I already studied this and I realized it was water or also Oxygen
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What is da answer please i need help
jolli1 [7]

Answer:

Air and water i think

Explanation:

Cause Air =25% and water=25% so that equals 50%

8 0
3 years ago
7. An engineer is using a wire that has a resistance of 1.5 . This resistance is too high for the application he is designing. T
Veronika [31]

Answer and Explanation:

We know that resistance R=\frac{\rho l}{A}  from the given equation of resistance it is clear that resistance depends on resistivity length  and area of the material but we can not change the length because it is given that the length must be 2.5 cm long.

So we can do two two things to reduce the resistance

  1. increase the cross sectional area
  2. decrease the resistivity of the material
7 0
3 years ago
If A vector = i^-j^+k^ then unit vector in the direction of A vector
Novosadov [1.4K]

If <em>A</em> = <em>i</em> - <em>j</em> + <em>k</em>, then the magnitude of <em>A</em> is

||<em>A</em>|| = √(1² + (-1)² + 1²) = √3

Then the unit vector in the direction of <em>A</em> is 1/||A|| multiplied by <em>A</em> :

<em>u</em> = <em>A</em>/||<em>A</em>|| = (<em>i</em> - <em>j</em> + <em>k</em>)/√3

(choice D)

6 0
3 years ago
Two energy transfers take place when a book hits the ground, Which type of energy transfers are those
bazaltina [42]

Answer:

I think that when a book hits the ground its potential energy converts into kinetic energy and then kinetic energy is transformed into sound and heat energy.

Explanation:

6 0
3 years ago
Suppose a NASCAR race car rounds one end of the Martinsville Speedway. This end of the track is a turn with a radius of approxim
sergiy2304 [10]

Answer:

10.53m/s²

Explanation:

Centripetal acceleration is the acceleration of an object about a circle. The formula for calculating centripetal acceleration is expressed by:

a = \frac{v^2}{r}

v is the velocity of the car = 24.5m/s

r is the radius of the track = 57.0m

Substitute the given values into the formula:

a = \frac{24.5^2}{57} \\\\a = \frac{600.25}{57}\\ \\a = 10.53m/s^{2}

Hence the centripetal acceleration of the race car is 10.53m/s²

6 0
3 years ago
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