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goldenfox [79]
3 years ago
9

Why is it important that scientists have a common language of measurement?

Physics
1 answer:
iris [78.8K]3 years ago
5 0

Answer:

because to make the measurement system same all over the world and make it compareable

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An object 2cm high is placed 3cm in front of a concave lens of focal length 2cm, find the magnification?​
Simora [160]

Answer:

0.4

Explanation:

A concave lens is a diverging lens, so it will always have a negative focal length. Image distance is always negative for a concave lens because it forms virtual images.

From the lens formula;

1/f = 1/u+ 1/v

- 1/2 = 1/3 - 1/v

1/v = 1/3 + 1/2

v= 6/5

v= 1.2 cm

Magnification = image distance/object distance

Magnification = 1.2cm/3cm

Magnification = 0.4

8 0
3 years ago
two-point charges are 10.0 cm apart and have charges of 2.0 uc and -2.0uc respectively What is the magnitude of the electrical f
Scorpion4ik [409]

Answer:

Electric field due to two charges is given as

E = 1.44 \times 10^7 N/C

Explanation:

As we know that two charges are opposite in nature

So the electric field at the mid point of two charges will add together

so the net field is given as

E = 2\frac{kq}{r^2}

now we have

q = 2\times 10^{-6} C

r = 5 cm = 0.05 m

now we have

E = 2\frac{(9\times 10^9)(2\times 10^{-6})}{0.05^2}

E = 1.44 \times 10^7 N/C

6 0
3 years ago
The force required to open air bags is dangerous for:
pentagon [3]

It is dangerous for children. Air bags are dangerous to children age 12 and under because the bag inflates at speeds up to 200 mph and that sudden blast of energy can severely injure or kill passengers who are too close to the air bag. If possible, children should ride in the center of back seat, properly restrained with a seat belt.

5 0
3 years ago
A girl police light on level ground with a force of 45 N at a 30° angle above the horizontal the girl pulls a sled 7.3 m how muc
Naya [18.7K]

Explanation:

W=Fdcos0

=45×7.3cos30

=284.4J

7 0
3 years ago
AQ5. What is a car’s speed in m/s if it travels: Remember to write the speed number WITH the correct unit.
AVprozaik [17]

Answer:A

Explanation:

7 0
3 years ago
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