Answer:
Because the gravitational attraction of the Sun hold them in motion around it
Explanation:
For an object travelling in a straight path at constant velocity, the net force acting on the object must be zero.
The planets in the Solar System, however, do not experience a zero net force: in fact, the Sun exerts a gravitational attraction on them, whose magnitude is given by
where
G is the gravitational constant
M is the mass of the Sun
m is the mass of the planet
r is the average distance between the Sun and the planet
Due to the presence of this force, the Sun makes the planets 'deviating' from their straight path, forcing them to following an elliptical path around the Sun.
Answer:
Decreases
Explanation:
"Effort" usually refers to the applied force. An inclined plane decreases the force required while increasing the distance that the force is exerted over. So even though there's less force needed, the amount of work stays the same.
Answer:
Dopamine is a neurotransmitter chemical which is released by the neurons of the brain for transfer of information from cell to cell. It regulates the movement and emotional responses in the human body. The abnormal levels of dopamine can be responsible for the neurological diseases.
The decrease of dopamine liberation from the substantia nigra of the brain can lead to Parkinson's disease whereas the excess release may lead to over-sensitivity of the dopamine receptors and can be responsible for the disease schizophrenia.
Since distance is a scalar and not a vector, the total distance traveled is the sum of all the distances covered throughout the journey.
In Physics, we have two categories of quantities;
The difference between vectors and scalars is that vectors has direction but scalars do not have direction. Both quantities posses magnitude.
The total distance covered can be obtained algebraically since distance is a scalar.
Hence, total distance covered = 2 cm + 6cm + 5 cm = 13 cm
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