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Igoryamba
3 years ago
13

Which statement is correct?

Physics
2 answers:
slega [8]3 years ago
6 0

Answer:B

Explanation:

Galilean transformation are only approximately correct,while Lorentz transformation are more exact

jarptica [38.1K]3 years ago
3 0

Answer: the answer is (b)

Explanation:

from the options considered above, option (b) is the right answer i.e.

Galilean transformations are only approximately correct for relative speeds that are small compared to the speed of light, and Lorentz transformations are only approximately correct for relative speeds near the speed of light.

Why?

That is because Galilean transformations only work for speed is far much smaller than the speed of light.

Also Lorentz transformation(s) tends to be valid for any value of particle

This tells us that it is valid for speed smaller as well as nearly equal to the speed of light

cheers i hope this helps!!!!!

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5. How are humans affecting global climate change?
andreyandreev [35.5K]

Answer:

Due to the generation of carbon dioxide

Explanation:

Climate change occurs due to global warming generated by greenhouse gases. Carbon dioxide is the gas that does not leave or allow solar radiation from the sun to rise from the Earth's surface, increasing the average temperature of the planet.

Burning fossil fuels for energy generation such as coal is another source of carbon dioxide generation. The generation of energy should be directed towards the production of renewable energies, using sources such as solar and wind energy.

5 0
3 years ago
A 0.05-kg car starts from rest at a height of 0.95 m. Assuming no friction, what is the kinetic energy of the car when it reache
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The kinetic energy of the car is A.) 0.466 J
6 0
3 years ago
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A sound wave of 70 cm travels 840 m in 2.5 sec. What is the velocity and frequency of sound?
Darya [45]
-- Speed = (distance) / (time to cover the distance) = 840/2.5 = 336 m/s

-- Frequency = (speed) / (wavelength) = 336/0.70 = 480 Hz. 
5 0
3 years ago
A 77.0 kg woman slides down a 42.6 m long waterslide inclined at 42.3. at the bottom, she is moving 20.3 m/s.how much work did f
zhuklara [117]

Answer:

5.791244495 KNm

Explanation:

The height h is given by, h=42.6sin42.3^{o}

Potential energy, PE is given by

PE=mgh where m is mass of the woman, g is acceleration due to gravity whose value is taken as 9.81 m/s^{2} and h is already given hence substituting 77 Kg for m we obtain

PE=77*9.81*42.6sin42.3^{o}=21656.7095 Nm

PE=21.6567095 KNm

We also know that Kinetic energy is given by0.5mv^{2} where v is the velocity and substituting v for 20.3 we obtain

KE=0.5*77*20.3^{2}=15865.465 Nm

KE=15.865465 KNm

Friction work is the difference between PE and KE hence

Friction work=21.6567095 KNm-15865.465 Nm=5.791244495 KNm

8 0
3 years ago
In introductory physics laboratories, a typical Cavendish balance for measuring the gravitational constant G uses lead spheres w
NeTakaya

Answer:

F=2.47*10^{-10} N

Explanation:

The gravitational force is calculated by using

F=G\frac{M_1M_2}{r^2}

G: Cavendish constant = 6.67*10^{-12}Nm^2/kg^2

r=2.30cm=0.023m

M1=1.4kg

M2=14.0g=0.014kg

By replacing we have

F=2.47*10^{-10} N

hope this helps!!

6 0
3 years ago
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