Need help with exercises 3,4,5
Will give brainliest!!!
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I pretty sure that 3 is b and 4 is A and 5 I need a full picture
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I know that Density=mass/volume but i don't know the volume for that one ^
Please answer fast!
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Mass=Density×Volume
2)
3)
the second one the answer is 8.80 :)
and for the third one the density is 7.5
i hope this is helpful
have a nice day
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Answer: centimeters per second (cm/s)
Explanation:
The relation between the frequency and the wavelenght is:
Velocity = wavelenght*frequency.
So in a relation of wavelenght vs frequency, we will have the relationship:
Where wavelenght is Y and frequency is X
wavelenght = velocity/frequency.
So the constant is the velocity, and we know that the units of the wavelenght is cm, the unit of frequency is Hz (or 1/s), so the units of the velocity is cm/s
Answer:
cm/s
Explanation:
λν=c where λ is the wavelength, ν is the frequency and c is the speed of light.
λ = c/v which is in cm/s/Hz
But we would use just cm! Because that's how we measure the wavelength in this example.
However, the constant is c, the speed of light, which we measure as a speed, so cm/s will do.
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The kinetic energy of the squirrel with a mass of 0.9 Kg running with a speed of 4 m/s is 7.5 J.
What is kinetic energy?
Kinetic energy of an object is a form of energy generated by virtue of the motion of the object. Kinetic energy is dependent on the mass and velocity of the body.
When a body starts to move its potential energy starts to convert to kinetic energy and the kinetic energy will be maximum at the highest speed. When the object slow down and pause in a position it gains potential energy again.
The kinetic energy KE = 1/2 mv²
Given mass = 0.9 Kg
velocity = 4 m/s.
KE = 1/2 0.9 Kg × 4² m/s
= 7.5 J
Therefore, the kinetic energy of the squirrel is 7.5 J.
To find more on kinetic energy, refer here:
#SPJ2
Answer:
A). Option A
B). Option B
C). Option B
Explanation:
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Explanation:
Newton's second law of motion states that when a certain force is acted on an object then it is equal to the mass m of that object multiplied by the acceleration a of the object.
Mathematically, the relation is as follows.
F = m × a
Thus, we can conclude that when an object is acted on by an unbalanced force then the object will start to accelerate.
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Both show random motions of the flower pollen and smoke due to the random motion of the water and air molecules.Jan Ingenhousz had described the irregular motion of coal dust particles on the surface of alcohol in 1785. Nevertheless Brownian motion is traditionally regarded as discovered by the botanist Robert Brown in 1827. It is believed that Brown was studying pollen particles floating in water under the microscope. He then observed minute particles within the vacuoles of the pollen grains executing a jittery motion. By repeating the experiment with particles of dust, he was able to rule out that the motion was due to pollen particles being 'alive', although the origin of the motion was yet to be explained. Consider a large balloon of 10 meters in diameter. Imagine this large balloon in a football stadium or any widely crowded area. The balloon is so large that it lies on top of many members of the crowd. Because they are excited, these fans hit the balloon at different times and in different directions with the motions being completely random. In the end, the balloon is pushed in random directions, so it should not move on average. Consider now the force exerted at a certain time. We might have 20 supporters pushing right, and 21 other supporters pushing left, where each supporter is exerting equivalent amounts of force. In this case, the forces exerted from the left side and the right side are imbalanced in favor of the left side; the balloon will move slightly to the left. This imbalance exists at all times, and it causes random motion. If we look at this situation from above, so that we cannot see the supporters, we see the large balloon as a small object animated by erratic movement. Now return to Brown’s pollen particle swimming randomly in water. One molecule of water is about .1 to .2 nm, (a hydrogen-bonded cluster of 300 atoms has a diameter of approximately 3 nm) where the pollen particle is roughly 1 micrometer in diameter, roughly 10,000 times larger than a water molecule. So, the pollen particle can be considered as a very large balloon constantly being pushed by water molecules. The Brownian motion of particles in a liquid is due to the instantaneous imbalance in the force exerted by the small liquid molecules on the particle. Okay, I hope that'll answer your question!