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trapecia [35]
3 years ago
13

The race car was was moving for 3.7 hours and during that time moved 500 miles east. What is the speed? What is the velocity?

Physics
1 answer:
vaieri [72.5K]3 years ago
8 0

Speed:

v = \frac{500 \,\,\mbox{miles}}{3.7 \,\,\mbox{h}}\approx 135.14 mph

Velocity:

Velocity os speed with director (an oriented vector):

The velocity is 135.14 mph in the direction east

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You and your friends are driving down the road. Your car breaks down. You have to use a 1,210 N force to push the car 201 m to t
Katyanochek1 [597]

Answer:

2.43\cdot 10^5 J

Explanation:

Since the force applied is parallel to the displacement of the car, the work done on the car is simply given by:

W=Fd

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d = 201 m is the displacement of the car

Substituting numbers into the equation, we find:

W=(1210 N)(201 m)=2.43\cdot 10^5 J

5 0
4 years ago
An electromagnetic wave has a frequency of 1.0 x 10^5. What is the wavelength of the wave?
SashulF [63]

Answer:

The frequency , speed and wavelength of an electromagnetic wave are related by the formula

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frequency = speed / wavelength

substituting the values

frequency = 3 x #10 ^8# m /s / 1 x #10^15# m

= 3 x #10^-7# /s

6 0
3 years ago
Read 2 more answers
Which graph represents the solution set of the system of inequalities?<br><br> {−2x+y≤4y&gt;x+2
Jet001 [13]

Answer:

The fourth graph is the answer

Explanation:

We have inequalities

-2x+y\leq 4      \rightarrow y\leq 2x+4

y>x+2

For the first inequality all points at or below the graph of y are solutions, and for the second inequality all the points above the graph of y are the solutions. So, the solution to these inequalities are points that are above the graph of y>x+2 and below the graph of y\leq 2x+4. The shaded region in the fourth graph satisfies these conditions.

<em>Looking at other choices, we see that the first two graphs do not even represent the graphs of our inequalities, and the third graph does represent the inequalities but shades the wrong region. </em>

P.S: the graph of the inequality y>x+2  is dashed because   y is "greater than" and not "equal to" x+2, so this indicates that the values on the line y=x+2 are not included. And the graph of the inequality y\leq 2x+4 is a solid line because y is "less than or equal to" 2x+4, so we are including the values on the line y=2x+4, and that's why it's solid.

6 0
3 years ago
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Which of the following is a method of purifying water? A. Freezing B. Aeration C. Combustion D. Fixation
mafiozo [28]
Your correct answer would be B.

Hope this helps!
3 0
4 years ago
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A missle is flying at a speed 125 m/s. if the missle has a mass of 125 kg. What’s it’s kinetic energy
Fynjy0 [20]

Answer:

976562.5\ Joules

Explanation:

We\ are\ given:\\The\ mass\ of\ the\ missile=125\ kg\\The\ velocity\ of\ the\ missile=125\ m/s\\Hence,\\As\ we\ know\ that,\\Kinetic\ energy\ possessed\ by\ an\ object\ with\ mass\ m\ moving\\ with\ a\ velocity\ v:\\E_k=\frac{1}{2}mv^2\\Here,\\The\ Kinetic\ Energy\ possessed\ by\ the\ missile=\frac{1}{2}*125*(125)^2=976562.5\ Joules

6 0
3 years ago
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