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4 years ago

What is a good scientific question on a baloon powered car? (it's for my science fair)

Physics

1 answer:

Salsk061 [2.6K]4 years ago

6 0

Answer:

Balloon powered car works on the principle of Newtons III law. Escaping air from the balloon, the car accelerates forward. The reaction is the air behind the car, pushing against it, and with the same force car moves forward is the action.

Some scientific questions are:

1. What is the energy stored in the balloon?

Ans: Potential energy (Potential energy is stored in elastic balloon)

2. Which energy is used in balloon-powered car?

Ans: Kinetic energy. (Whenever the balloon escapes the air, potential energy is converted into Kinetic energy)

3. What is the principle involved in balloon powered car?

Ans: Newtons III law.

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Quem é ou foi Elon Musk??

mario62 [17]

Explanation:

Elon Reeve Musk FRS (/ ˈiːlɒn /; nascido em 28 de junho de 1971) é engenheiro, designer industrial, empresário de tecnologia e filantropo. Ele é o fundador, CEO, CTO e designer-chefe da SpaceX; investidor inicial, [nota 1] CEO e arquiteto de produto da Tesla, Inc.; fundador da The Boring Company; co-fundador da Neuralink; e co-fundador e co-presidente inicial da OpenAI. Ele foi eleito membro da Royal Society (FRS) em 2018. Em 2018, ele foi classificado em 25º na lista da Forbes das pessoas mais poderosas do mundo, e foi classificado em primeiro lugar na lista da Forbes dos líderes mais inovadores de 2019. Em 29 de julho de 2020, seu patrimônio líquido foi estimado em US $ 68 bilhões e ele foi listado pela Forbes como a nona pessoa mais rica do mundo. Ele é o CEO com o mandato mais longo de qualquer fabricante automotivo globalmente.

3 0

3 years ago

A man is sitting on a chair with wheels. He grabs a 2.1 kg book from the desk and throws

geniusboy [140]

The speed of the man and the chair after the book is thrown is 0.2 m/s.

The given parameters:

mass of the book, m₁ = 2.1 kg
speed of the book, u₁ = 7.2 m/s
mass of the man, M = 70 kg
mass of the book, m = 9.2 kg

The total mass of the man and the book is calculated as follows;

m₂ = 70 kg + 9.2 kg

m₂ = 79.2 kg

The speed of the man and the chair after the book is thrown is determined by applying the principle of conservation of linear momentum;

$m_1 u_1 = m_2u_2\\\\u_2 = \frac{m_1u_1}{m_2} \\\\u_2 = \frac{2.1 \times 7.2}{79.2} \\\\u_2 = 0.2 \ m/s$

Thus, the speed of the man and the chair after the book is thrown is 0.2 m/s.

Learn more about conservation of linear momentum here: brainly.com/question/7538238

8 0

3 years ago

A golf ball has a mass of 120g. Calculate its increase in mass when it is travelling at 40ms1. What is this as a percentage of i

kicyunya [14]

Answer:

$Percentage=8.889\times 10^{-13}$ %

Explanation:

From special theory of relativity the dynamic mass m is related with the rest mass $m_{0}$ of the body as

$m=\frac{m_{0} }{\sqrt{1-\frac{v^{2} }{c^{2} } } }$

Here, c is the speed of light and v is the velocity of object.

Given mass of the golf ball is 120 g.

$m=\frac{120 }{\sqrt{1-\frac{(40)^{2} }{(3\times 10^{8} )^{2} } } }\\m=120(1-\frac{(40)^{2} }{(3\times 10^{8}) ^{2} })^{-\frac{1}{2} } \\$

Now applying the binomial theorem and solve the above equation.

$m=(1+\frac{1}{2}(\frac{40}{3\times 10^{8} }) ^{2} )\\m=120(1+8.889\times 10^{-15})$

Therefore, increase in mass is,

$\Delta m=120\times 8.889\times 10^{-15} \\\Delta m=10.6668\times 10^{-13} g$

Now percentage of increase in mass with rest mass is,

$Percentage=\frac{10.6668\times 10^{-13} g}{120g} \times 100\\Percentage=8.889\times 10^{-13}$

Therefore, the percentage of increase in mass with rest mass is $Percentage=8.889\times 10^{-13}$ .

4 0

4 years ago

A car which is traveling at a velocity of 15 m/s undergoes an acceleration of 6.5 m/s2 over a distance of 340 m. How fast is it

Svetach [21]

v² - u² = 2 a ∆x

where u = initial velocity, v = final velocity, a = acceleration, and ∆x = distance traveled.

v² - (15 m/s)² = 2 (6.5 m/s²) (340 m)

v² = 4645 m²/s²

v ≈ 68.15 m/s

5 0

4 years ago

Which of the following causes tornados A. Dry climates B.Sationary fronts B. Condensation D. Wind shear

natta225 [31]

The answer is wind shear (D)

8 0

4 years ago