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4 years ago

12

Which describes the image produced by a convex mirror? smaller than the object and right-side up smaller than the object and ups

ide down same size as the object and right-side up

1 answer:

inessss [21]4 years ago

6 0

Answer:Smaller Than the object and right-side up

Explanation:

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Three mountain climbers set out to climb a mountain from the same altitude and all arrive at the same location at the top. Mount

vampirchik [111]

C did the most effort, but A walked the longest, so a reasonable answer is that they all did the same amount of work, as B simply mediates.

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3 years ago

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The dancing bear family loves when their trainer gives them little treats to reward them for a good performance. If the trainer

lions [1.4K]

Answer:

748 treats.

Explanation:

If the trainer gives out 34 treats and gave them out for 22 shows, then to find the total you need to multiply 34 by 22, or (a longer but more simple way) add 34, 22 times.

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3 years ago

A 256 Hz tuning fork is resonating in a closed tube on a warm day when the speed of sound is 346 m/s. What is the length of the

Ilya [14]

Assuming our "closed tube" is closed at only one end, then
<span> v = fλ = f*4L/n
</span><span> where "n" is the harmonic number. So
</span><span> L = nv / 4f = n*346m/s / 4*256Hz = n*0.38 m
</span> <span>Since the only option in your list that is an integer multiple of 0.38 m is 1.35 m
</span><span> I'd say that we're hearing the fourth harmonic.
answer is
</span><span>A. 1.35 m</span><span>
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3 years ago

A 2.5. Gram arrow enters a 100 g apple with a speed of 115 m/s. If the apple was originally at rest, then what speed will it hav

stich3 [128]

Answer:

The speed of the apple will be 2.81 m/s when the arrow enters it.

Explanation:

We can find the speed of the apple by conservation of linear momentum:

$p_{i} = p_{f}$

$m_{ap}v_{ap_{i}} + m_{a}v_{a_{i}} = m_{ap}v_{ap_{f}} + m_{a}v_{a_{f}}$

Where:

$m_{ap}$ is the mass of the apple = 100 g = 0.1 kg

$m_{a}$ is the mass of the arrow = 2.5 g = 0.0025 kg

$v_{ap_{i}}$ and $v_{ap_{f}}$ is the initial and final speed of the apple respectively

$v_{a_{i}}$ and $v_{a_{f}}$ is the initial and final speed of the arrow respectively

Since the apple was originally at rest ( $v_{ap_{i}}$ = 0) and knowing that $v_{a_{f}}$ = $v_{ap_{f}}$ when the arrow enters into the apple, we have:

$0 + 0.0025 kg*115 m/s = v(0.0025 kg + 0.1 kg)$

$v = 2.81 m/s$

Therefore, the speed of the apple will be 2.81 m/s when the arrow enters it.

I hope it helps you!

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3 years ago

Why does sugar have a lower melting point than salt

Anni [7]

Sugar is a molecule held together by covalent bonds and Salt is held together by ionic bonds

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3 years ago