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lianna [129]
3 years ago
15

A car moving at a speed of 20 m/s, then accelerates uniformly at until it reaches a speed of What distance does it travel during

the time it is accelerating?
a)50 m
B)54 m
C)58 m
D)62 m
E)66 m
Physics
1 answer:
Andru [333]3 years ago
6 0
E because you have to drive
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PLEASE HELP!!!After a gas-filled balloon is released, it rises 90 feet by the end of the first minute. By the end of the second
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The situation is an example of an arithmetic progression through the data 90, 120, 150, .. . In this case, the arithmetic difference is 30. The expression that applies here is an = 90 + 30 * (n - 1) where n is the order of the term to be determined. If n is 8, then  the height is equal to a. 300 feet.
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How many nodes, not including the endpoints, are there in a standing wave that is two wavelengths long?.
Marizza181 [45]

Not including the endpoints, there are 3 nodes.

<h3>What is a node?</h3>

In a wave, a node is a stationary point. For example in a vibrating string of a guitar, the endpoints would be nodes.

But here we need to ignore the endpoints, we only know that the wave has two wavelengths.

For a wave with N wavelengths the number of nodes that are not endpoints is just given by 2*N - 1  (while if we counted the endpoints we would have 2*N + 1).

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7 0
3 years ago
Help me with this problem
gizmo_the_mogwai [7]

Answer:

0.149 m, 321.8^{\circ}

Explanation:

Let's start by resolving each vector into its components along the x- and y- direction:

E_x = E cos \theta = (0.111) cos 90^{\circ}=0\\E_y = E sin \theta = (0.111) sin 90^{\circ}=0.111 m

And

F_x = F cos \theta = (0.234) cos 300^{\circ} = 0.117 m\\F_y = F sin \theta = (0.234) sin 300^{\circ} = -0.203 m

So the components of the vector sum are

R_x = E_x + F_x = 0+0.117 = 0.117 m\\R_y = E_y + F_y = 0.111 -0.203 = -0.092 m

The magnitude of the vector sum is

R=\sqrt{R_x^2 +R_y^2 }=\sqrt{(0.117)^2+(-0.092)^2}=0.149 m

And the direction is

\theta=tan^{-1} (\frac{|R_y|}{R_x})=-tan^{-1} (\frac{0.092}{0.117})=-38.2^{\circ}=321.8^{\circ}

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Which example best illustrates the transfer of energy between two waves? A) A buoy rises in the water as a boat speeds past. B)
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Answer:

A.

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