If opposite poles repel each other, why does the north end of a compass point to the north pole?
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Related Questions
15 POINTS! What are some differences and similarities between Electromagnetic and Mechanical waves?
What effect does solar radiation have on climate when comparing the equator to polar- regions?
Why does a balloon filled with helium rise while a balloon filled with an equal volume of average atmospheric air does not?A.Helium has no mass, but air does. B.Helium increases the balloon's mass more than air. C.Helium has a higher density than air. D.Helium has a lower density than air.
a 0.45 kg soccer ball changes its velocity by 20.0 m/s due to a force applied to it in 0.10 seconds. what force was necessary for this change in velocity?
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Answer: It takes 365 days for earth to complete one revolution.
Explanation: Earth takes 365 days to complete one revolution around the sun.
Learn more about earth from the link given below:
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Answer:
The frequency of sound wave created by trumpet is 437.5Hz
Explanation:
Given
the speed of sound wave = 350 m
the wavelength of sound wave = 0.8 m
the frequency of sound wave = ?
All the waves have same relationship among wavelength, frequency and speed, which is given by the equation:
v = fλ, where
v is speed of the wave
f is frequency of the wave
λ is wavelength of the wave
therefore frequency of sound wave is given by
f = v/λ
= 350m/0.8m
= 437.5
= 437.5Hz (since 1 = 1 Hz (Hertz)
Hence the frequency of sound wave created by trumpet is 437.5Hz
Answer:
The frequency of sound wave created by trumpet is 437.5Hz
Explanation:
Given
the speed of sound wave = 350 m
the wavelength of sound wave = 0.8 m
the frequency of sound wave = ?
All the waves have same relationship among wavelength, frequency and speed, which is given by the equation:
v = fλ, where
v is speed of the wave
f is frequency of the wave
λ is wavelength of the wave
therefore frequency of sound wave is given by
f = v/λ
= 350m/0.8m
= 437.5
= 437.5Hz (since 1 = 1 Hz (Hertz)
Hence the frequency of sound wave created by trumpet is 437.5Hz
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Answer:
The acceleration of the object is 0.5 m/s²
a is correct.
Explanation:
Given that,
Mass of object = 5.0 kg
Acceleration
Using newton's second law
The force is the product of the mass of the object and acceleration.
Put the value of m and a
Now, The same force would give a 20 kg object
So, Using newton's second law again
The acceleration is
Put the value of m and F
Hence, The acceleration of the object is 0.5 m/s²
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Answer:
Large swarms of locusts can completely strip the foliage and stems of plants such as forbs and grasses. ... They often eat dry plant matter on the ground and will forage for weak or dead grasshoppers when plant food is scarce. As nymphs have a large appetite, they cause more damage than adults.
Explanation:
Answer:
they say yum yum as they eat planets and make humans starve
Explanation:
but they still eat them
200° Celsius
300° Celsius
400° Celsius
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Boiling point is at 200° Celsius
Explanation:
Matter exists in three states:
- Solid state: the molecules of the element are fixed in their place and strongly bonded to each other - therefore, they can only vibrate around their fixed position.
- Liquid state: the molecules of the element are free to slide past each other - however, there are still intermolecular forces that keep them close to each other
Gas state: the molecules of the element are completely free to move far from each other
Evaporation is the process that occurs when a substance changes from liquid to gas state. This process occurs when the temperature of the substance reaches its boiling point.
In the graph given in this problem (find it in attachment), we observe that:
- At first, the temperature increases up to 50 Celsius; this is the solid state
- Then the temperature stops increasing --> this is the transition of phase from solid to liquid (melting), which occurs at a constant temperature of 50 Celsius (melting point)
- Then, the temperature increases again up to 200 Celsius (liquid state)
- Then the temperature stops increasing again --> this is the transition of phase from liquid to gas (evaporation), which occurs at a constant temperature of 200 Celsius, which is therefore the boiling point
- Then, the temperature increases again (gas state)
Therefore, the boiling point of the substance in this problem is
200° Celsius
Learn more about temperature:
#LearnwithBrainly
Answer:
B
Explanation:
200 degrees Celcius.