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2 years ago

PLEASE HELP!!! SCIENCE QUESTION!

Physics

2 answers:

Tatiana [17]2 years ago

5 0

C. has to be right, also its the only one that makes sense.
Hope this helps!

Cerrena [4.2K]2 years ago

4 0

Answer:

C. Electronic charges have electric fields surrounding them that allow them to exert forces on other objects without touching them.

Explanation:

All the electric charges have electric field in the region surrounding them

This electric field is given as

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

above formula is the electric field due to a point charge in the surrounding region of it.

Now due to this electric field when other charges comes into this region they will experience electric force on them which is given as

$F = qE$

due to above reason two charges either attract or repel each other

so correct answer will be

C. Electronic charges have electric fields surrounding them that allow them to exert forces on other objects without touching them.

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3 years ago

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Which of the following BEST explains why stability is an important skill for athletes?

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Blood contains positive and negative ions and therefore is aconductor. A blood vessel, therefore, can be viewed as anelectrical

CaHeK987 [17]

Answer:

<h2>Magnetic field required for the given induced EMF is 1.41 T</h2>

Explanation:

Potential difference across the blood vessel is given as

$E = vBd$

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$v = 14.8 cm/s$

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now we have

$1 \times 10^{-3} = (14.8 \times 10^{-2})B(4.80 \times 10^{-3})$

$B = 1.41 T$

Now volume flow rate of the blood is given as

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$Q = \frac{\pi d^2\frac{E}{Bd}}{4}$

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2 years ago

A starter pistol is fired 150m away from the spectators who hear the gun 0.5s after they see it fired. How fast does sound trave

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Answer:

300m/s

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150/0.5

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2 years ago

A 6.0 kg metal ball moving at 4.0 m/s hits a 6.0 kg ball of putty at rest and sticks to it. The two go on at 2.0 m/s.

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The metal ball lost energy while the putty ball gained energy.

<h3>What is momentum?</h3>

Momentum is the product of mass and velocity of the body. We must note that momentum before collision is equal to momentum after collision.

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2) kinetic energy after collision = 0.5 * 6 * 2= 6 J

3) Kinetic energy of putty ball = 0.5 * 6 * 2= 6 J

4) Energy lost by the metal ball = 12 J - 6 J = 6 J

5) Energy gained by the putty ball = 6 J - 0J = 6 J

6) The rest of the energy was converted to heat after the collision.

Learn more about kinetic energy: brainly.com/question/999862

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2 years ago