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Nikolay [14]
3 years ago
12

sla’s change in velocity is 30 m/s, and Hazel has the same change in velocity. Which best explains why they would have different

accelerations?
Physics
1 answer:
sweet [91]3 years ago
8 0
Because acceleration depends not only on the change in velocity.
It also depends on the time during which the change occurs.
The formula is

Acceleration = (change in velocity) divided by (time for the change) .

Maybe Sla changed his velocity in 3 seconds, but Hazel
took all morning to change hers.  In that case, even though
the amounts of change were equal, the times were different,
so the quotients of (change/time) were different. 
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It is interesting to speculate on the properties of a universe with different values for the fundamental constants.
qwelly [4]

Answer:

Part a)

\lambda = 0.345 m

Part b)

\Delta x = 0.274 m

Part c)

r = 2.8 \times 10^{11} m

Explanation:

Part a)

De broglie wavelength is given as

\lambda = \frac{h}{mv}

\lambda = \frac{1}{(0.145)(20)}

\lambda = 0.345 m

Part b)

By principle of uncertainty we know that

\Delta x \times \Delta P = \frac{h}{4\pi}

\Delta x \times (0.145)(21 - 19) = \frac{1}{4\pi}

\Delta x = 0.274 m

Part c)

As we know that

\frac{kq_1q_2}{r^2} = \frac{mv^2}{r}

also we know

mvr = \frac{nh}{2\pi}

v = \frac{h}{2\pi mr}

now we have

\frac{ke^2}{r} = \frac{mh^2}{4\pi^2m^2 r^2}

r = \frac{h^2}{4\pi^2mke^2}

r = 2.8 \times 10^{11} m

5 0
3 years ago
Pilots often take advantage of the ____,which are highly-speed winds between 7km and 16 km above earths surface.
lukranit [14]
I believe it is called or referred to as the "Jet Stream". During World War II, allied pilots encountered high speed winds in the upper air. They named those winds after the fastest planes they came up against: fighters equipped with jet engines! Jet stream winds in winter time can reach up to 300 MPH as well!
6 0
3 years ago
What would be the best design for an experiment that tests how much water expands when frozen?
galben [10]

B. Purchase a small plastic container and mark 1-ounce increments on the outside to determine volume. Pour 5 ounces of water into the container, and place in the freezer for 8 hours. Compare the frozen or ending volume with the liquid or beginning volume.

<h3>How much water expands when frozen?</h3>

Ice is less denser than the liquid form. Water is the only known non-metallic substance that expands when it freezes because it is the unique property of water. Water density decreases and it expands approximately  about 9% by volume. For calculating the expansion of water, plastic container is the best option. We know that water expands when the water freezes because it is a unique property of water which allows the survival of aquatic organisms.

So we can conclude that option B is the right answer.

Learn more about water here: brainly.com/question/1313076

#SPJ1

5 0
2 years ago
If several forces are exerted on a system, calculate the work done by each force, then multiply the results.
maria [59]

Answer:

false, each force might have a different about and a different direction

4 0
4 years ago
It is 40 degrees F outside. What is this in Celsius?​
Vlad1618 [11]

It is 40 degrees F outside. What is this in Celsius?​

4°C

7 0
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