When you exert, the cells need more oxygen. The heart delivers blood that carries oxygen, so as the demand for oxygen increases the heart rate (and the volume of blood delivered on each beat) increases.
as you run you'r body speeds up and gets you'r heart to speed up aswell.
The speed.
I wouldn't think so.
No, I wouldn't think so.
I think what you are feeling is your heart double beating. Meaning that every human heart has 2 beats, one to remove the blood and the other to bring it in.
The speed of light changes if the density of medium changes. In hot air, the density is less so due to the change in speed of light, we think that it is flickering.
The speed.
Yes, momentum changes when speed changes because momentum is directly proportional to an object's velocity. When an object's speed changes, its momentum will also change accordingly.
If an object's speed changes, it means that it is either speeding up or slowing down. If an object's direction changes, its velocity changes as well, as velocity is a vector quantity that includes both speed and direction. These changes in speed and direction are typically caused by forces acting on the object.
The speed may, or may not, change. Acceleration means that the velocity changes; this means that either the speed changes, or the direction.
Yes, when an object changes speed, its acceleration changes. Acceleration is a measure of how quickly the speed of an object changes over time. So, if the speed changes, the acceleration of the object will also change.
If someone's speed changes, it means they are moving faster or slower than before. If someone's direction changes, it means they are now moving in a different path or route. Both changes can affect the individual's position, velocity, and acceleration.