Which does not contain a lens?

zheka24 [161]

A, the energy of moving water

7 0

3 years ago

In Part I of this experiment, the______was intentionally manipulated. This was the independent variable. The dependent variable

Masja [62]

Answer:

1. car hitting a barrier 2. velosity of the washer 3. force applied to the car 4. acceleration of the car.

Explanation: edge 2020

why because nice

8 0

3 years ago

Read 2 more answers

Teresa drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took hours. When Teresa drove

Ksenya-84 [330]

Question:

Teresa drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 12 hours. When Teresa drove home, there was no traffic and the trip only took 8 hours. If her average rate was 20 miles per hour faster on the trip home, how far away does Teresa live from the mountains?

Do not do any rounding.

Answer:

480 miles

That is Teresa lives 480 miles from the mountains

Explanation:

Here we have

Distance D = Speed S × Time t

On her way to the mountain we have

D = S × 12

On her way back we have

D = (S +20)×8

Therefore, by comparing the two above equations, we have

S × 12 = (S +20)×8

Therefore, 12·S = 8·S +160 or

4·S = 160

Hence S = 160/4 = 40 miles/hour

Therefore, from D = S × 12, we have

D = 40 × 12 = 480 miles.

7 0

3 years ago

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An electric vehicle starts from rest and accelerates at a rate a1 in a straight line until it reaches a speed of v. The vehicle

levacccp [35]

(a) $t=\frac{v}{a_1}+\frac{v}{a_2}$

In the first part of the motion, the car accelerates at rate $a_1$ , so the final velocity after a time t is:

$v = u +a_1t$

Since it starts from rest,

u = 0

So the previous equation is

$v= a_1 t$

So the time taken for this part of the motion is

$t_1=\frac{v}{a_1}$ (1)

In the second part of the motion, the car decelerates at rate $a_2$ , until it reaches a final velocity of v2 = 0. The equation for the velocity is now