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Serga [27]
3 years ago
13

........................................................................answer?

Physics
1 answer:
Setler [38]3 years ago
7 0
First one is B,
second one is they are transverse and need to travel in a medium

third one is the first one because they vibrate as they move in a vacuum!!
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Define fundamental unit ? write its two example. ​
stealth61 [152]

the International System of Units, the fundamental units are: The meter (symbol: m), used to measure length. The kilogram (symbol: kg), used to measure mass. The second (symbol: s), used to measure time. The ampere (symbol: A), used to measure electric current.

8 0
3 years ago
Deceleration ALWAYS means slowing down while negative acceleration does not always have to be slowing down
alexgriva [62]
A little confused by the wording of the problem, but it is true that an object can have a negative acceleration and be speeding up in the negative direction… so I’d go with True
4 0
3 years ago
A point charge q1=+2.40μC is held stationary at the origin. A second point charge q2=−4.30μC moves from the point x=0.125m , y=0
algol [13]

Answer:

Explanation:

Potential energy of a pair of charges

= k q₁q₂ /r₁₂

At r₁₂ = .125 m

= - 9 x 10⁹ x 2.4 x 4.3 x 10⁻¹² / .125

= - 743 x 10⁻³J

At r₁₂ = √2 x .275 m

- 9 x 10⁹ x 2.4 x 4.3 x 10⁻¹² / √2 x .275

= - 238.85  x 10⁻³J

= 239 x 10⁻³ J

Change = - 238.85  x 10⁻³ +743 x 10⁻³

= 504.15 x 10⁻³ J

B )

Work done by electric force will be same but in negative sign

= - 504.15 x 10⁻³ J

= - 504 x 10⁻³ J

3 0
3 years ago
Daniel wants to find out if he can notice the difference in light intensity when he adds some lit candles to a set of 50 lit can
nexus9112 [7]

Answer:

5

Explanation:

The light intensity may be defined as the strength of the light or the magnitude of its brightness that a source of light can produce.

The light threshold is the minimum intensity of the light that our eye can detect and the ability to adapt to darkness.

In the context, Daniel wishes to find if can notice the difference in the intensity of the light when he add 5 candles to the set of 50 candles.

He noticed that when he added 5 candles, he could notice the difference in the intensity and when he added less than 5 candles to the set of 50 candles he could not detect.

Thus, the difference threshold for Daniel to detect the change in the intensity of the light is 5 candles.

3 0
4 years ago
An amusement park ride travels up and down.
Natasha2012 [34]

Answer:

Kindly check explanation

Explanation:

The total displacement between 0 seconds and 16second will be :

Final position (Xf) after 16 seconds = 0 m

Initial position(Xi) at 0 seconds = 12 m

(Xf - Xi) = 12m

The total distance traveled between 0 seconds and 16 seconds will be :

Vertical Distance traveled = 12 meters

6 0
4 years ago
Read 2 more answers
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