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netineya [11]
3 years ago
7

Help me and I'll make u Brainliest and follow u

Physics
1 answer:
Monica [59]3 years ago
5 0

26. D. crushing the sugar cube and dissolving it in water.

27. A. atom

28. B. molecule

29. B. plum pudding model of Joseph John Thomson

30. B. He used cathode ray tubes which showed that all atoms contain tiny negatively charged subatomic particles or electrons.

31. D. protons and neutrons are relatively heavier than electrons.

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An overnight rainstorm has caused a major roadblock. Three massive rocks of mass m1=528 kg, m2=838 kg and m3=311 kg have blocked
JulsSmile [24]

Answer:

FA=419,25N

F12=287,25N

Explanation:

The bulldozer is moving the rocks as one system, the weigth for the complete system is:

M=m1+m2+m3=1677kg

From newton´s second law the acceleration can be related to the force by:

FA=m*a=1677kg*0,250m/s^{2}=419,25N

on the middle rock we have the force F12 from the first to the middle rock on the direction of movement and F32 from the las rock to the middle rock on the opposite direction of movement.

For the last rock to accelerate at the same rate it must be subjected to a force:

F23=m3*a=311kg*0,250m/s^{2} =77,75N

This equals the force F32 on the opposite direction. the resultant force on the middle rock to mantain this acceleration should be:

F2=m2*a=838kg*0,250m/s^{2} =209,5N

The sum of all the forces applied to the middle rock is:

F2=F12-F32

Solving for F12:

F12=F2+F32=209,5N+77,75N=287,25N

3 0
3 years ago
Why are temperatures in the thermosphere not strictly comparable to those experienced near earth's surface?
Nostrana [21]

Temperatures in the thermosphere are not strictly comparable to those experienced near Earth's surface because the gases of the thermosphere are moving at very high speeds, and the temperature is very high.

The thermosphere lies among the exosphere and the mesosphere. “Thermo” way warmness and the temperature in this layer can reach as much as 4,500 tiers Fahrenheit. in case you have been to hang around inside the thermosphere, though, you'll be very cold because there are not sufficient fuel molecules to transfer the warmth to you.

The thermosphere is the outer layer of the Earth's surroundings, extending from about 53 miles to greater than 370 miles above the surface. The temperature increases rapidly in this layer due to the absorption of huge quantities of incoming excessive electricity sun radiation by using atoms of nitrogen and oxygen.

Learn more about thermosphere here: brainly.com/question/8741747

#SPJ4

4 0
2 years ago
True or False.  The more energy put into making a sound the lower its intensity.
Aleks04 [339]
The answer is true I did that test befor
5 0
3 years ago
Read 2 more answers
A dog sits on a flat surface. If the dog has a mass of 13 kg, what is the normal force acting on it?
maksim [4K]

Answer:

127

Explanation:

f(n)=mg

(13)*(9.81)

127.4N

7 0
3 years ago
2.<br> The inertia of an object depends on its
denis23 [38]

Answer:

Inertia of an object depends on the <em>mass </em>of the object.

Explanation:

Inertia is the property that is possessed by a matter( anything that has weight and occupies space) that enables it to be at rest or in a state of continuous uniform motion.

<em>The inertial of a body is the resistance that is present in the body, that forces acting on the body have to overcome for the body to move or continue moving.</em><em> </em>

The inertia of a body depends on the mass of such a body, which is directly proportional. The mass of an object is the measure of inertia,  the bigger the mass of an object the bigger the inertia.

<em>Therefore the Inertia of an object is largely dependent on the mass of such an object. </em>

6 0
4 years ago
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