A train is travelling at 15m/s. It accelerates at 3m/s² for 20 seconds. How far does the train travel in this time?

The teacher measured the maximum height and the minimum height of the plastic duck above the screen as the wave passed. The teac

fenix001 [56]

The teacher measured the maximum height and the minimum height of ...

5 days ago — ... screen as the wave passed . The teacher repeated his measurements. Table 4 shows the teacher's measurements. Calculate the mean amplitude of the water wave.

4 0

3 years ago

What two kinds of motion combine to produce projectile motion?

solong [7]

The two kinds of motion are horizontal and vertical

3 0

3 years ago

A rocket is fired with an initial VELOCITY OF 100m/s at an angle of 55° above the horizontal, It explodes On the mountain Side 1

GuDViN [60]

Answer

688.32m and 277.44m

Explanation :

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$\large{\maltese{\textsf{\underline{To find :-}}}}$

The X and Y coordinates of the rocket relative of firing

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$\large{\maltese{\textsf{\underline{Given :-}}}} \\ \\ \sf velocity (v_i) = 100m{s}^{-1} \\ \sf angle ({\theta}_{1}) = 55.0{\degree} \\ \sf time (t) = 12s$

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$\Large{\maltese{\textsf{\underline{\underline{Step by Step Solution:-}}}}}$

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The horizontal range of projectile at x.

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$\sf \large{x = v_{xi}} \times t \\ \\ \sf \large{x = v_i \times \cos {\theta}_{i} \times t}$

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$\large\textsf{\underline{Now substituting the required values}}$

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$\sf x = 300 \times \cos 55{\degree} \times 12 \\ \\ \sf x = 100 \times 0.5756 \times 12 \\ \\ {\underline{\boxed{\bold{ x = 688.32m}}}}$

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The vertical position of projectile at y.

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$\sf \large y = v_{yi} \times t - (\frac{1}{2} \times g \times {t}^{2}) \\ \\ \sf \large y = v_i \times \cos \theta \times t - \frac{1}{2} g {t}^{2}$

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$\textsf{ \large {\underline{Now substituting the required values}} }$

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$\sf y = 100 \times \cos55{ \degree} \times 12 - \frac{1}{2} \times 9.80 \times {12}^{2} \\ \\ \sf y = 100 \times 0.8192 \times 12 - 0.5 \times 9.8 \times 144 \\ \\ \sf y = 983.04 - 705.6 \\ \\ \underline{ \boxed{ \bold{y = 277.44m}}}$

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<h3>Henceforth, the distance at horizon is 688.32m and at vertical is 277.44m.</h3>

8 0

2 years ago

Which of these is a scalar quantity?

USPshnik [31]

Answer:

It would be C because quantity means numbers

6 0

3 years ago

Read 2 more answers

How will a wave change as it moves from a layer of lower velocity into a lower layer of higher velocity?

Dimas [21]

Answer:

The wave moves away from the normal

Explanation:

Waves are the disturbances that are able to carry energy from one place to another. These waves can travel in both the denser as well as the rarer medium.

In the denser medium, the waves travel at a slower rate, and on the other hand, in rarer medium, the waves can travel at a comparatively faster rate.

As a wave moves from a layer of low velocity (denser medium such as a liquid) to a layer of high velocity (rarer medium like air), then the waves move away from the normal (perpendicular line) and result in the increase in the velocity of the wave.

7 0

4 years ago