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3 years ago

An ellipse has two focal points. One of the focal points is the _____. earth, moon, or Sun

Physics

2 answers:

Rasek [7]3 years ago

6 0

An ellipse has two focal points. One of the focal points is the <u><em>Sun</em></u>.

Because they planets move faster when they are around the sun.

pogonyaev3 years ago

3 0

An ellipse has two focal points. One of the focal points is the sun. The sun is considered as one of the focal points because the planets orbit around the sun in an elliptical path.

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The harder a gas pedal in a car is pressed the faster the car's velocity increases. Which phrase best describes the relationship

Contact [7]

Answer:

There is both a positive correlation and causation

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3 years ago

Integrated circuits are manufactured on chips made of the element.

Finger [1]

The "substrate" of the integrated circuit is super-pure silicon.

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3 years ago

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When determining the scope of a disaster, analysts consider which of the following? (There may be more than one correct answer.)

enot [183]

A and C would be correct

hope this helps!!

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3 years ago

Read 2 more answers

Compute your average velocity in the following two cases: (a) You walk 85.5 m at a speed of 1.41 m/s and then run 85.5 m at a sp

Vikki [24]

Answer:

a) The average speed was V = 2.1 m/s

b) The average speed was V = 2.97 m/s

Explanation:

The average velocity is given by the distance travelled by the time it took to travel it.

a) In this case we have two stages, both with the same length of 85.5 m so the total distance will be the sum of both that is 85.5 + 85.5 = 171 m. We are then given the speed for both stages. In order to calculate the average speed we need to compute the total time it took to complete the route, to do that we need to calculate the time it took to complete each stage. So we have:

t_1 = S1/V1 = 85.5/1.41 = 60.64 s

t_2 = S2/V2 = 85.5/4.15 = 20.60s

total time = t1 + t2 = 60.64 + 20.60 = 81.24 s

V = total length/ total time = 171/81.24 = 2.1 m/s

b) In this case we have the time it took for each stage, they're given in minutes so the first thing we need to do is convert them to seconds, we do that by multiplying it by 60. We have:

t1 = 1*60 = 60 s

t2 = 1.32*60 = 79.2 s

total time = 139.2 s

We can now compute the length of each stage, we do that by multiplying the time it took to complete each stage by the speed of each. We have:

S1 = 60*1.41 = 84.6 m

S2 = 79.2*4.15 = 328.68 m

total length = 84.6 + 328.6 = 413.28 m

V = total length / total time = 413.28 / 139.2 = 2.97 m/s

4 0

3 years ago

problems like this A diver bounces straight up from a diving board, avoiding the diving board on the way down, and falls feet fi

Ymorist [56]

This question is incomplete the complete question is

A diver bounces straight up from a diving board, avoiding the diving board on the way down, and falls feet first into a pool. She starts with a velocity of 4.00 m/s and her takeoff point is 1.80 m above the pool. (a) What is her highest point above the board? (b) How long a time are her feet in the air? (c) What is her velocity when her feet hit the water?

Answer:

(a) Xs=0.459m

(b) t=0.984 s

Explanation:

(a) To reach maximum distance

$g=-9.8m/s^{2}\\ Vf=0\\v_{b}^{2}=v_{a}^{2}+2gx_{s} \\ x_{s}=\frac{0-(3^{2} )}{-2*9.8}\\ x_{s}=0.459m$

(b) For Time

To find t we must find t1 and t2

t=t1+t2

For T1

$t_{1}=(Vb-Va)/g \\t_{1}=(0-3)/9.8\\t_{1}=0.306s$

For T2

$x_{l}=Vbt+(1/2)gt_{2}^{2}\\ as\\x_{l}=x_{1}+x_{s}\\x_{l}=1.8+0.459\\x_{l}=2.259\\so\\t_{2}=\frac{2.259*2}{9.8} \\t_{2}=0.6789s$

For Total Time

t=t1+t2

t=0.306+0.6789

t=0.984s

(c) To find Vc

Vc=Vb+gt2

Vc=(0)+(9.8)(0.6789)

Vc=6.65 m/s

7 0

3 years ago