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4 years ago

Which of these has the most kinetic energy? *

Physics

1 answer:

Kaylis [27]4 years ago

4 0

Kinetic energy is the energy of motion. The only thing that's moving in any of the choices is the fish in B .

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4. What is the best estimate of the frequency of the wave shown below?

tatyana61 [14]

Answer:

The answer is "Option D"

Explanation:

Please find the graph file in the attached file.

Using formula:

$\to v= \rho \lambda \\\\\ \to \lambda= 130 \cm \\\\ \to v= 335 \frac{cm}{s}\\\\ \to \rho= \frac{v}{\lambda} \\\\$

$=\frac{335}{130} \\\\ = 2.57 \approx 2.50 \ Hz$

7 0

3 years ago

Which quantity may be calculated directly using Newton’s second law of motion?

dusya [7]

Newton's second law of motion can be used to calculate weight.

5 0

4 years ago

Read 2 more answers

Using Newton’s second law, why do you think a cotton ball may not be used as a baseball in a baseball game.

stich3 [128]

Answer:

as its mass and velocity will less so its momentum will be less than that of baseball

3 0

3 years ago

In the skeletal system, these structures are responsible for connecting bones.

artcher [175]

The answer for the structures that are responsible for connecting bones is B

8 0

3 years ago

A criminal is escaping across a rooftop and runs off the roof horizontally at a speed of 5.0 m/s, hoping to land on the roof of

lisabon 2012 [21]

Answer:

D = 3.0 m

Explanation:

Assuming no other forces than gravity acting upon the criminal, his horizontal velocity must keep constant at 5.0 m/s.
So, the horizontal displacement, applying the definition of average velocity, is just:

$\Delta x = v_{h} * t (1)$

In the vertical direction, the criminal is in free fall, starting from rest.
Since we know the dfference in height between both roofs, we can use the kinematic equation for vertical displacement, as follows:

$\Delta h = \frac{1}{2} * g * t^{2} = 2.0 m$

Solving for t, we get:

$t =\sqrt{\frac{2*\Delta h}{g}} = \sqrt{\frac{2*2.0m}{9.8m/s2} } = 0.6 s (2)$

Replacing in (1), we get:

$\Delta x = v_{h} * t = 5.0 m/s * 0.6 s = 3.0 m$

So, if the horizontal distance between the two buildings is larger than 3.0 m, the criminal will fall to ground.

4 0

3 years ago