How long does it take an airplane to fly 5000 miles if it maintains a speed of 240 miles per hour
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Part C Next, you’ll test the hardness of each rock by scratching it with different substances as shown in the chart. The values in the chart are based on the Mohs Scale of hardness, which ranks the hardness of rocks and minerals on a scale of 1 to 10. First try to scratch a rock with your fingernail. If you can make a mark on the rock with your fingernail, record the related hardness value from the chart in your table. If a fingernail doesn’t scratch the rock, try to scratch it with the copper penny. If the penny doesn’t scratch the rock, try the wire nail and finally the masonry nail. Enter a hardness value for each rock.
Which scientist first made a model of the atom called the plum pudding model?John DaltonJ.J. ThomsonErnest RutherfordNeils Bohr
What is the average speed of a cheetah that runs 70m in 2.5 seconds?
should your directions to a friend for traveling from one city to another include displacements or distances?Explain
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Answer:
27/125
(3/5)³
(0.6)³
0.216 gm/cm³ or g/cc
Explanation:
- Given:
- Volume = 125 cm³
- mass: 27 grams
Here Density is actually the amount of matter present in unit volume.
- Mathematically, rho(like p) (tapering downwards) = Mass/Volume
- Putting, 27/125 g/cm³
0.216 g/cc
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Electrical power = (voltage) x (current)
= (5 volts) x (2 amperes) = 10 watts.
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more powerful
Explanation
Electromagnetic waves are waves that do not require material medium for propagation. For example x-rays, UV and gamma rays.
From the wave equation, V= λf, when the wavelength is short the frequency is high.
Frequency determines the intensity of the wave. When high the frequencies are high the waves has more penetrating power, hence more powerful.
Answer:
More powerful
Explanation:
I answered it and got it right.
a. True
b. False
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Answer: true
Explanation: The zero Kelvin is the point where there is no energy between the atoms of the solid object, so there will no radiation emited, which means that there is no energy emited.
This has a lot of sense, if the object has temperature equal to zero, is logical to think that it can not radiate energy in the form of heat (or in any form)
-273 degress Celsius not heat energy is left among atoms.
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Answer: The kinetic energy of the block increases by 15 Joules.
Explanation:
Work done is defined as the product of force and displacement of the object.
Mathematically,
where,
W =work done
F = force
s = Displacement
Kinetic energy is defined as the energy which is possessed by the virtue of object's motion.
In the question, it is given that work done on block is 15 Joules and we need to find the change in kinetic energy of the block.
We know that,
Work done on the object = Change in kinetic energy of the object
Thus, Kinetic energy is increased by 15 Joules.
The kinetic energy depends on the work done by the applied force. The kinetic energy of the block increases by 15 J.
What is kinetic energy?
The energy possessed by an object by its motion is known as the object's kinetic energy.
Given data-
The magnitude of the constant horizontal force is F = 5 N.
The work done on the block is, W = 15 J.
As per the work-energy theorem, the work done by the applied force is equal to the change in kinetic energy.
Then,
W = ΔKE
Solving as
15 = ΔKE
ΔKE = 15 J
Thus, we can conclude that the block's kinetic energy increases by 15 J.
Learn more about kinetic energy here:
B) Ocean tides bring warm water to the surface.
C) Warm water contains more salt than cold water.
D) Ocean water loses heat to the air at the surface.
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Answer:
The answer is A because the less dense the water is the more closer to the surface it will be and when heated by the sun, it increases the temperature of surface currents.
Explanation:
I took the test, hope this helped!