The rate of change of object's velocity per unit of time is known as acceleration.
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Answer:
The correct option is B. 7.5 * 10¹⁴ Hz
Explanation:
Frequency = (speed) / (wavelength)
= (3 x 10⁸ m/s) / (4 x 10⁻⁷ m)
= (3/4 x 10¹⁵) ( m / m - s )
= (0.75 x 10¹⁵) /sec
= 7.5 x 10¹⁴ Hz
= 750,000 GHz
The car has a 12 mile head start, going 80 mph, so his distance is:dcar=80∗t+12
The is going at 108 mph, so his distance is:dcop=108t
Setting them equal to each other we get:80t+12=108t⇒12=28t⇒t=1228=37
So 3/7 of an hour.about 25.7 mins.
Answer:
The volume of water that was in the kettle is 1170
Explanation:
Given:
Power, P = 2.0 kW = 2000 W, Mass of stainless steel, = 710 g = 0.71 kg at temperature of
Part A:
If it takes time, t = 3.5 minutes to reach boiling point of water , then from conservation of energy,
Total energy supplied by the burner = Total heat gained by the water and the stainless steel to rise from to
i.e. Pt = (100 - 20 ) + (100 - 20 )
=
= 1.17 kg
where = 4200 J/Kgk (specific heat capacity of water), = 450 J/Kgk (specific heat capacity of steel)
But volume of water in the the kettle, v =
∴ v = 1170
`1.Many galaxies exist.
3.Most galaxies are moving away from us.
4.Uniform background radiation is detected in every direction.
Explanation:
The Big bang theory is a theory explaining the formation of the universe from the early stages to today.According to the theory , the universe started as a hot ,small , & dense super-force with no singularity(atom, structure, form).The evidence of this theory include;
- systematical shifting of the galaxies away from us
- A radiation called cosmic microwave background radiation only explained by the theory
- Larger redshifts causing great drop off in the number of quasar
- Abundance of different elements in the universe such as hydrogen and lithium checked through spectra of oldest stars and gas clouds.
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Big bang theory:brainly.com/question/1581355
Keywords: evidence, supports, Big bang theory
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