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ch4aika [34]
3 years ago
13

*please please help* Suppose you are going on a car trip with your family.

Physics
1 answer:
Strike441 [17]3 years ago
3 0

Answer:

1. To determine the average speed for the first day of the trip, the total distance traveled would have to be acquired and then how long it took to arrive at the final destination, only including the time that was actually traveled and not any time that was accumulated by any rest stops. Once you have this information, you have to divide the distance over time and you have the average speed (mph).

2. To determine the instantaneous speed, you would just have to look at the speedometer, which tells you at what speed the car is traveling at that exact moment.

Explanation:

I took physics 121 and got the same question. This is my answer that i used and my teacher said it was right.

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Find the angle of incidence at which a light beam traveling from a medium having the index of refraction n1 = 2.7 to another med
luda_lava [24]

Answer:

The angle of incidence at which total internal reflection takes place will be equal to \Theta _c=36.34^{\circ}

Explanation:

We have given that light is traveling from a medium  of refractive index x 2.7 to a medium of refractive index 1.6

So refractive index of first medium n_1=2.7 and n_2=1.6

We have to find the angle of incidence for total internal reflection

For total internal reflection

n_1sin\Theta _c=n_2sin90^{\circ}

\Theta _c=sin^{-1}\frac{n_2}{n_1}

\Theta _c=sin^{-1}\frac{1.6}{2.7}

\Theta _c=36.34^{\circ}

So the angle of incidence at which total internal reflection takes place will be equal to \Theta _c=36.34^{\circ}

7 0
3 years ago
A truck brakes from 15 m/s to 2 m/s in 15 seconds. What is its acceleration?
iris [78.8K]
If we take v=u+at and our given values are:

v=final velocity 20m/s

u=initial velocity 15m/s

a=acceleration

t=time 5sec

we plug those into our equation:

20m/s=15m/s+a(5s)

now we just rearrange to solve for acceleration.

(5m/s)/(5s)=a

a=1m/s^2

hope this helps!
PLEASE MARK BRAINLEIST
3 0
3 years ago
Sand is pouring out of a pipe and is forming a conical pile on the ground. The radius of the pile is increasing at a rate of 2 f
Anton [14]

Answer:

a)\ V=3053.628059 \ ft^3

b)\ V'=1017.876\ ft^3/day

Explanation:

<u>Rate of Change</u>

The volume of a cone of radius r and height h is given by

\displaystyle V=\frac{\pi r^2h}{3}

The height is said to be 1/2 of the radius, thus

\displaystyle V=\frac{\pi r^2\cdot r}{2\cdot 3}

\displaystyle V=\frac{\pi r^3}{6}

a) Knowing r=18 feet, the volume is

\displaystyle V=\frac{\pi 18^3}{6}

V=3053.628059 \ ft^3

b) The rate of change of the volume is computed by taking the derivative of both sides respect to the time

\displaystyle V'=3\frac{\pi r^2}{6}r'

\displaystyle V'=\frac{\pi r^2}{2}r'

Where r' is the given rate of change of the radius: 2 feet/day.

Now we compute

\displaystyle V'=\frac{\pi 18^2}{2}\cdot 2=1017.876

\boxed{V'=1017.876\ ft^3/day}

6 0
3 years ago
Two billiard balls, each with a mass of 0.17 kg, collide with each other on a
Anastasy [175]

Answer:The answer is B , 0.20 m/s south

Explanation:

7 0
3 years ago
The shape of a sign gives you a clue about the information contained on the sign.
irakobra [83]
Yeah, like a stop sign. We know it is most likely a stop sign since it has 8 sides or is an octagon. 
I hope I helped!
7 0
3 years ago
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