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3 years ago

Which of the following waves are mechanical?

2 answers:

8 0

"Ocean waves" is the only example of mechanical waves on that list.
The other three choices are all electromagnetic waves.

Rzqust [24]3 years ago

5 0

Which of the following waves are mechanical:


a. ocean waves

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how do you solve this problem. A bat flying at 3.7m/s spots an insect 23.8 meters away. How much must the bat increase its speed

RideAnS [48]

Here's how I would do it:

How far does he have to go to catch the bug ? 23.8 meters

How soon does he want to get there ? 1.8 seconds

What speed does he need ? (23.8 m) / (1.8 sec) = 13.222 m/sec

What speed is he flying now? 3.7m/s

How much does he need to increase it ? (13.222 - 3.7) = 9.5 m/s faster

5 0

4 years ago

A bullet traveling at 350 m/s hits a tree, penetrating 0.125 m into the tree before stopping. The mass of the bullet is 0.200 kg

Sloan [31]

Answer:

$-4.9\cdot 10^5 m/s^2$

Explanation:

The motion of the bullet is a uniformly accelerated motion, therefore we can find its acceleration by using the following suvat equation:

$v^2-u^2=2as$

where

v is the final velocity

u is the initial velocity

a is the acceleration

s is the distance covered

For the bullet in this problem:

u = 350 m/s is the initial velocity of the bullet

v = 0 is the final velocity (the bullet comes to a stop)

s = 0.125 m is the stopping distance of the bullet

Therefore, by solving the equation for a, we find its acceleration:

$a=\frac{v^2-u^2}{2s}=\frac{0^2-350^2}{2(0.125)}=-4.9\cdot 10^5 m/s^2$

And the negative sign tells that the direction of the acceleration is opposite to that of the velocity.

7 0

4 years ago

Choose the more reactive nonmetal. P or O

makkiz [27]

P always P because P is an awkward Dorian letter that can always be trusted

6 0

4 years ago

n a presentation about measuring mass, one of your classmates states, "Two objects of the same size will always have the same ma

Neporo4naja [7]

Answer:
The statement is not correct.

Reason:
If two objects have the same mass, their respective densities determine their volumes.
By definition,
density = mass/volume.
or volume = mass/density.

Therefore if two objects have the same mass, the mode dense object (with higher density) will occupy less volume than the other object.

4 0

3 years ago

Read 2 more answers

a car traveling north with a velocity of 29m/s changes its velocity to 36 in the span of 11s. What was the car's acceleration du

Nikolay [14]

Answer:

I’m so sorry I tried solving it but I don’t understand it can you explain the question a little bit more ty

Explanation:

8 0

4 years ago