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4 years ago

A man is sitting in the outfield bleachers watching a baseball game through binoculars. Which is MOST LIKELY true?

2 answers:

7 0

Choice-A is the correct one. It doesn't say it, but it means he'll see the ball reach the catcher's mitt first BEFORE HE HEARS IT slap the mitt.

amid [387]4 years ago

5 0

Answer:

Explanation:

Because the speed of light is faster than the speed of sound, the man will see the ball reaching the catcher's mitt before he will hear the sound of the ball hitting the mitt.

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Two charges, qA and qB, are separated by a distance, r, and exert a force, F, on each other. What new force will exist for the f

ioda

Answer:

$\frac{1}{2}F$

Explanation:

The magnitude of the electrostatic force between two charges is given by Coulomb's law:

$F=k\frac{q_1 q_2}{r^2}$

where:

$k=9\cdot 10^9 Nm^{-2}C^{-2}$ is the Coulomb's constant

$q_1, q_2$ are the two charges

r is the separation between the two charges

In this problem, at the beginning we have:

$q_1=q_A$ is the first charge

$q_2=q_B$ is the second charge

r is their initial separation

So the initial force is

$F=k\frac{q_A q_B}{r^2}$

Later, we have:

qA is doubled and r is doubled

This means that:

$q_A'=2q_A$ is the new charge

$r'=2r$ is the new separation

So the new force is:

$F'=k\frac{q_A' q_B}{r'^2}=k\frac{(2q_A)(q_B)}{(2r)^2}=\frac{1}{2}(k\frac{q_A q_B}{r^2})=\frac{1}{2}F$

3 0

3 years ago

When you are in the way of a moving object and a collision is sure to occur, you are better off decreasing its momentum over …?

BlackZzzverrR [31]

<span>When you are in the way of a moving object and a collision is sure to occur, you are better off decreasing its momentum over time. Which is nothing but force.
mv/t = m.a = F

Fill the blank as: "Time"

Hope this helps!</span>

7 0

3 years ago

An object travels in a circular path of radius 5.0 meters at a uniform speed of 10. m/s. What is the magnitude of the object's a

vladimir1956 [14]

I think F= mv²/r
And F=ma
So, ma = mv²/r
a = v²/r
a = 100/5
a = 20 m/s

8 0

3 years ago

Read 2 more answers

An ultracentrifuge accelerates from rest to 99300 rpm in 1.95 min. Randomized Variables f = 99300 rpm t = 1.95 min l = 9.4 cm

Levart [38]

Answer: i'm pretty sure its part B

7 0

4 years ago

A 5 kg pineapple is hanging completely still in mid air on a string and suddenly explodes

11111nata11111 [884]

Answer:

Explanation:

Conservation of momentum

Initial momentum is zero

3(15) + 2(v) = 0

v = - 22.5 m/s

v = 22.5 m/s downward

3 0

3 years ago