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balu736 [363]
3 years ago
6

Imagine you are on a bus with a helium balloon tied on a string tied to the seat in front of you. the bus stops short to avoid r

unning over a rabbit and you are thrown forward. what happens to the balloon in relation to the bus? 1. the balloon pops. 2. the balloon moves forward. 3. the balloon moves backward. 4. the balloon's position does not change
Physics
1 answer:
zalisa [80]3 years ago
3 0

<span>As the bus accelerates forward, the air inside moves back relative to the bus. The pressure on the back of the bus is higher which will make the balloon floats forward for there is a much lower pressure in front of the bus. Nevertheless, when a short stop happens, the balloon will move backwards due to higher pressure that accumulates in front of the bus. This is an example of general relativity theory where the force you feel when accelerating is indistinguishable from the force of gravity.</span>

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To test the hypothesis that the population mean mu=3. 6, a sample size n=14 yields a sample mean 4. 007 and sample standard devi
PolarNik [594]

The P value for the given data set is 25127. For finding P value, we have to must find the Z value.

<h3>How to get the z scores?</h3>

If we've got a normal distribution, then we can convert it to standard normal distribution and its values will give us the z score.

The Z value is calculated as;

Z = \dfrac{X - \mu}{\sigma})

Z = (X - μ) / σ

Z = (4.007 - 3.6) / 0.607

Z = 0.67051

The P value for the given data set is 25127.

Learn more about z-score here:

brainly.com/question/21262765

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5 0
2 years ago
When an object reflects all the light waves that strike it looks white or black?
egoroff_w [7]
Light waves can be from any color, depends on what it is bouncing no or reflecting off of.
3 0
3 years ago
What fraction of the total energy of a SHO is kinetic when the displacement is one third the amplitude
Bas_tet [7]

Answer:

The fraction of kinetic energy to the total energy is \frac{K}{T}=\frac{8}{9}.

Explanation:

displacement is one third of the amplitude.

Let the amplitude is A.

x= A/3

The kinetic energy of the body executing SHM is

K = 0.5 mw^2(A^2 - x^2)\\\\K = 0.5 m w^2 \left ( A^2 -\frac{A^2}{9} \right )\\\\K = 0.5 mw^2\times \frac{8A^2}{9}......(1)

The total energy is

T =0.5 mw^2A^2 ..... (2)

Divide (1) by (2)

\frac{K}{T}=\frac{8}{9}

5 0
3 years ago
A water line enters a house 2.0 m below ground. A smaller diameter pipe carries water to a faucet 5.0 m above ground, on the sec
nirvana33 [79]

Answer:

 P₁- P₂ = 91.1 10³ Pa

Explanation:

For this exercise we will use Bernoulli's equation, where point 1 is at the bottom of the house and point 2 on the second floor

          P₁ + ½ ρ v₁² + ρ g y₁ = P₂ + ½ ρ v₂² + ρ g y₂

          P1-P2 = ½ ρ (v₂² - v₁²) + ρ g (y₂-y₁)

In the exercise they give us the speeds and the height of the turbid, so we can calculate the pressure difference

For heights let's set a reference system on the ground floor of the house, so we have 5m for the second floor and an entrance at -2m

 

        P₁-P₂ = ½ 1.0 10³ (7² - 2²) + 1.0 10³ 9.8 (5 + 2)

       P₁-P₂ = 22.5 10³ + 68.6 10³

       P₁- P₂ = 91.1 10³ Pa

3 0
3 years ago
Lightning can sometimes occur on hot and humid summer evenings when there are no thunderstorms.
mart [117]

Answer:

(B) False

Explanation:

No, it is not possible to have thunder without lightning. Thunder is a direct result of lightning.

4 0
3 years ago
Read 2 more answers
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