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Arte-miy333 [17]
3 years ago
12

Which diagram best illustrates what happens when electromagnetic waves strike a reflective material? A horizontal red curved lin

e passes across a vertical black line labeled surface turning up as it crosses the black line. A horizontal red curved line passes across a vertical black line labeled surface turning down as it crosses the surface. Mark this and return
Physics
1 answer:
Luda [366]3 years ago
7 0

Answer:

It's Option D

Explanation:

Red line bounces off left side of black line.

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You need to design a banked curve at the new circular Super 100 Raceway. The radius of the track is 800 m and cars typically tra
uysha [10]

Answer:

33.1^{\circ}

Explanation:

Let's start by writing the equations of the forces along the two directions:

- Vertical:

N cos \theta = mg

where

N is the normal reaction

\theta is the angle between the road and the horizontal

(mg) is the weight of the car, with m being its mass and g the acceleration of gravity

- Horizontal:

N sin\theta = m \frac{v^2}{r}

where

v is the speed of the car

r is the radius of the turn

Dividing the 2nd equation by the 1st one, we get:

tan \theta = \frac{v^2}{rg}

In this problem:

r = 800 m (radius of the turn)

v=160 mi/h = 71.5 m/s is the speed

g=9.8 m/s^2

Substituting, we find:

\theta= tan^{-1} (\frac{v^2}{rg})=tan^{-1}(\frac{(71.5)^2}{(800)(9.8)})=33.1^{\circ}

8 0
4 years ago
If a truck is heading south at a velocity of 90m/s for 10 seconds how far did it travel?
RoseWind [281]

Answer:

Truck will be at a distance of 720 m

Explanation:

Speed of the truck is given as 90 m/sec

Time for which truck travel t = 10 seconds

We have to find the distance that how much truck travel in 8 sec with speed of 90 m/sec

We know that distance is given by distance=velocity\times time

So distance traveled by truck in 8 sec will be equal to =90\times 8 =720m

So truck will be at a distance of 720 m

3 0
4 years ago
Both cars start from the same point. Which describes the motion shown?
evablogger [386]
Is there a graph we can look at?
4 0
4 years ago
Read 2 more answers
Which statements about acceleration are true? <br> You can chose 2 or more answer
dangina [55]
Answers A, C, and D.
3 0
4 years ago
An ant is crawling along a yardstick that is pointed with the 0-inch mark to the east and the 36-inch mark to the west. It start
11Alexandr11 [23.1K]

Given :

An ant is crawling along a yardstick that is pointed with the 0-inch mark to the east and the 36-inch mark to the west.

It starts at the 14-inch mark, crawls to the 20-inch mark, then moves to the 16-inch mark.

To Find :

The total distance the ant traveled.

Solution :

Total distance travelled by ant = (distance between 14 and 20 inch mark) +

                                                      (distance between 20 and 16 inch mark)

Total distance = (20-14 ) + ( 20-16) = 6 + 4 = 10 inch.

Therefore, total distance the ant traveled is 10 inch.

Hence, this is the required solution.

4 0
3 years ago
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