What is the average speed in m/s for a car that travels 28 km in exactly 12 min?
Answers
Answer:
approximately 38.89 m/s.
Explanation:
To calculate the average speed, you can use the formula:
Average Speed = Distance / Time
Given:
Distance = 28 km
Time = 12 minutes = 12/60 hours = 0.2 hours
Now, plug in the values:
Average Speed = 28 km / 0.2 hours = 140 km/h
To convert the average speed from km/h to m/s, you can use the conversion factor: 1 km = 1000 m and 1 hour = 3600 seconds.
Average Speed = (140 km/h) * (1000 m/km) / (3600 s/h) ≈ 38.89 m/s
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Which statement describes the interaction between the permanent magnets and the electromagnet in an electric motor? A. The current in the electromagnet is reversed by the permanent magnets B. The current in the permanent magnets is reversed by the electromagnet C. The poles of the permanent magnets are reversed by the electric field of the electromagnet. D. The metal loop in the electromagnet turns because of the magnetic field of the permanent magnets
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Answers
B. red
C. yellow
D. white
Answers
Answer:
C. yellow
Explanation:
The stars have different color depending on their temperature, in general the more blue or violet a star is, the higher its surface temperature, and the more orange or red, the lower its surface temperature.
In the stellar classification, stars with temperatures ranging from 5000K to 6000K are G type stars which are characterized by having a yellow color.
An example of a G-type star is the sun, which has a surface temperature of around 5700K.
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Answer:
Kuiper
Explanation:
The region beyond the orbit of Neptune is known as Kuiper belt which contains ten of thousands of objects orbiting sun in long elliptical paths within 100 AU of the sun. Most of the objects in the Kuiper belt are composed of frozen gases. Comets which are icy bodies are found in the Kuiper belt. Kuiper belt is also home to dwarf planets like Pluto, Makemake and Haumea.
b. twice the voltage and the same current will flow through each.
c. the same voltage and different current will flow through each.
d. twice the voltage and different currents will flwo through each.
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Answer: option B
Explanation: each cell is suppose to have an emf and an internal resistance.
Let E1 be the emf of the first battery and E2 be the emf of the second battery.
Et is the total emf.
Going by the connection described above, it is a series arrangement.
Hence the total emf is calculated as sum of individual emf
Et = E1 + E2
But each cell are identical, hence E1 = E2 = E
Et = E + E = 2E.
Hence the total voltage is twice the voltage.
Since the connection is a series arrangement, the current passing through each cell is the same.
These points have made option B the correct answer.
Answer:
b) Twice the voltage and the same current
Explanation:
The two batteries are identical, and are connected in series. When elements in a circuit are connected in series, the same current flow through them but the voltage drops are additive.
Since the two batteries are identical, the possess the same voltage of magnitude V.
Therefore, the total voltage,
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Physical properties are properties that you can see, feel and measure, they do not change the matter of the substance. Some examples of physical properties are Mass, Color, Shape, Hardness and Boiling point.
Physical properties are properties that you can see, feel and measure, they do not change the matter of the substance. Some examples of physical properties are Mass, Color, Shape, Hardness and Boiling point.