Explanation:
Magnet has two poles: (1) North pole and (2) South pole.
Like poles repel each other. If the like poles are interacting each other then there will be force of repulsion in between these poles.
Unlike poles attract each other. If the unlike poles are interacting each other then there will be force of attraction in between these poles.
S-S and N-N magnetic poles repel each other.
B The force of gravity between planets keeps them on a curved path and prevents them from leaving the solar system.
C The force created by the nuclear fusion of the hydrogen in the Sun causes the planets' curved paths.
D The speed of the planets and the gravitational pull of the Sun cause the planets' curved paths.
Answer:
Option D is the answer
Explanation:
The gravitational pull of the sun bends the path of the planet making it move in a elleptical path.
The complex balancing act between a satellite's forward speed and the gravitational force pressing upon it prevents satellites in orbit from falling to the ground or shooting off into space.
When a satellite is put into orbit, it reaches a fast enough speed to escape the Earth's gravitational attraction.
By continuously falling towards the Earth and moving forward at the same time, the satellite may maintain a stableorbit.
This motion results in a curved course, which causes the Earth to be in a constant state of freefall.
Although the satellite is constantly being drawn towards the Earth by gravity, its forward velocity prevents it from dropping.
Thus, satellites don't fall or break free into space and are kept in a stable orbit.
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Answer:
C
Explanation:
cooled air
I also think it's hot air, but I'm pretty sure it's because hot air rises. I'm not 100% sure so I'm sorry if it wrong :)
Answer:
They both rises to same height.
Explanation:
When an object is sliding up in friction less surface than according to conservation of energy its potential energy will be converted into kinetic energy.
Here, m is the mass, v is the velocity, g is the acceleration due to gravity and H is the height.
Here the height is independent on the mass of an object and its only depend on velocity.
Now according to the question, two objects have same velocity but they have different masses.
Therefore, they rises to the same height because height will not change with mass.
Let's recall Kinetic Energy Formula as follows:
Ek = Kinetic Energy ( Joule )
m = mass of the object ( kg )
v = speed of the object ( m/s )
Let us now tackle the problem !
Given:
initial speed of first object = initial speed of second object = v
final speed of first object = final speed of second object = 0
mass of first object = m
mass of second object = 2m
Asked:
height = H = ?
Solution:
We will use Conservation of Energy to solve this problem:
Both objects rise to the same height
Grade: High School
Subject: Physics
Chapter: Energy