The diagram below represents an electromagnetic wave. Please Help

A golf ball is hit from ground level at an angle of 3030 degrees above ground level. The terrain is level. The ball lands 55.231

zimovet [89]

Answer:

The initial speed of the golf ball was 25 m/s.

Explanation:

To find the initial speed of a projectile motion we must first find the motion equation corresponding to each axis:

For X axis we have an Uniform Rectilinear Motion, since no forces act along it:

$x_{(t)}=v_{ix}.t+x_i$ , where $v_{ix}$ stands for the initial speed component on x axis, and $x_i$ is the initial position on x axis (zero, in this case).

For Y axis we have a Constant Acceleration Motion, since the gravitational force acts along it:

$y_{(t)}=-\frac{1}{2} g.t^{2} +v_{iy}.t+y_i$ , where g is the acceleration of gravity, $v_{iy}$ stands for the initial speed component on y axis, and $y_i$ is the initial position on y axis (zero, in this case).

We can describe the initial speed's components as follow:

$v_{ix}=v_i.cos(30^0)$ and $v_{iy}=v_i.sin(30^0)$

Keeping this in mind, we're just three steps away from the answer.

The first step is expressing t in terms of x:

$t=\frac{x}{v_i.cos(30^0)}$

The second step is replacing this expression for t on the y axis equation:

$y_{(x)}=-\frac{1}{2} .g.(\frac{x}{v_i.cos(30^0)} )^2+\frac{v_i}{v_i} \frac{sin(30^0)}{cos(30^0)} .x$

Finally, we use the fact that when x=55.2312 m the golf ball lands, it means y=0 m, and resolve the equation for $v_i$

$0m=-\frac{1}{2} .9,8\frac{m}{s^2}.(\frac{55,2312m}{v_i.cos(30^0)} )^2+\frac{sin(30^0)}{cos(30^0)} .55,2312m$

Obtaining

$v_i=25\frac{m}{s}$

6 0

3 years ago

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Experiment to find ways to make rainbows.

algol [13]

Answer:

Explanation:

a) To get a rainbow from a prism arrangement, we will need

A triangular prism
A black cardboard box
A source of white light (light from the window will suffice)
A pocket knife

First, you cut a slit in one end of the cardboard with the pen knife.

Next you open up a space on top of the cardboard through which you can observe the experiment and its result.

Next, you place the triangular prism with its slant face facing the the cut slit.

Finally, position the slit to face the light from the open window, and adjust the prism till the projected bands of colored light (rainbow) is very much obvious on the other end of the box, opposite the slit.

b) For a light to yield rainbow, it most be composed of different component colors of light. The colors of light is due to the difference in wavelength, and dispersion is due to the different in the wavelengths of the component light. So to get rainbow from a light source, the light must not be monochromatic. This means that only light composed of component light of different colors can produce rainbow. Light from the sun for example is composed of 7 distinct colors of light, and white light can be created with just three colors; blue, green, and red light.

4 0

3 years ago

Which refers to the chemical name of CO? carbon monoxide carbon oxide monocarbon monoxide monoxide carbon

IgorC [24]

Answer:

Carbon monoxide

Explanation:

Carbon refers to the "C" which stands for carbon. Monoxide refers to the single molecule of oxygen present in the substance.

7 0

3 years ago

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an object near the earth's surface is in a state of free-fall. The object is experiencing a downward force of 194 n. What is the

Paraphin [41]

When an object is under free fall then it means the net force on the object is only due to gravitational attraction force

So here we have

$F_{net} = mg$

so in order to find mass we can use

$m = \frac{F_{net}}{g}$

here given that net force on the object is

F = 194 N

$m = \frac{194}{9.8}$

$m = 19.8 kg$

so the mass of the object must be 19.8 kg

7 0

3 years ago

On a hot summer day, heat waves can be seen rising from the asphalt. What type of heat transfer do the heat waves demonstrate?

Angelina_Jolie [31]

What you see rising from the road ... and call "heat waves" ...
are rising currents of air. The air that's been heated by
contact with the hot asphalt rises. (Why ? By being heated,
it becomes less dense than the other air around it, and the
buoyant force of being a less dense substance in a more dense
fluid makes it rise (float) ).

If we want to paint a complete picture, we can find all three
types of heat transfer going on here:

1). The air getting heated by direct contact with the hot road ==> conduction

2). The hot air rising through the cooler air around it ==> convection

3). How the road got so hot in the first place ==> radiation, from the sun

4 0

3 years ago

The diagram below represents an electromagnetic wave. Please Help​

The diagram below represents an electromagnetic wave. Please Help