speed of the participants is given as
now the kinetic energy of the participant is given as
As we know that
1 calorie = 4.2 J
so here 230 Calorie is provided by 1 bar
bar required is
Answer:
Both statements I, and II are true
Explanation:
I)One is true.The number of protons of the element is the defining characteristic of it. This is, if we take a proton or add a proton to a nucleus we will be changing the element. Therefore, the number of protons is the same for all neutral and not neutral atoms of that element.
II)Two is true. If an atom is neutral, it will have the same number of electrons and protons. As the number of protons for an element cannot change (see I), then the number of electrons will be the same for all neutral atoms of this element.
III)Three is false. We can have a neutral atoms of the same element with different number of neutrons, as neutrons do not change the charge of the atom(they change their mass, though). These are called Isotopes.
Answer:
The magnitude of the boat's velocity is 8.21 km/h.
Explanation:
We can find the boat's velocity as follows:
Where:
and are the components of the velocity of the water in the x and y-direction
and are the components of the velocity of the boat in the x and y-direction
Since the angle is 15° we have:
Now, the velocity of the boat is:
Therefore, the magnitude of the boat's velocity is 8.21 km/h.
I hope it helps you!
Answer:
The answer is below
Explanation:
When a gallon is blown the air energy is saved as potential energy which is compressed inside the balloon. However, when the balloon is released without trying its neck, the air energy quickly turned to kinetic energy, in which the air energy keeps moving as the balloon float around the space.
Hence, in short, what happens in terms of energy when you blow up a balloon and release it without trying its neck is that the air energy moves from potential energy to kinetic energy.
Answer:
The bicycle will slow down (or even stop, depending on the size of the force applied)
Explanation:
The cyclist is travelling north at a constant speed (because the question says there is no net force acting on him). The new force is against the direction of travel so will decelerate (slow down) the cyclist because Force, mass and acceleration are linked by the formula Force = mass x accerelation