Answer:
Explanation:
For this case we have the initial height given:
above the water
We know that the total time from the initial point and the end point it's
So we can use this kinematic formula in order to find the time to travel from the original height to the surface of the water:
We assume that the initial velocity is 0, the final height since it's at the surface so it would be 0m, the acceleration for this case would be the gravity and negative since it's acting downward, replacing we have this:
And solving for t1 we got:
Now we can find the velocity at the surface of the water like this:
Since we know that the total time from the begin and the end it's 5 s and from the calculation before we know that the time to reach the surface of the water is 1.01 s, then the time between the surface of the water and the final depth of the water is 5-1.01= 3.99 s
And then we can find the depth of the lake (D) using the formula for constant velocity like this:
According to galilo in the absence of air resistance fraction then the body mass 60kg and 40kg will reach the earth surface at the same time....
Answer:9,750,000,000
Explanation:
975kg can be recovered so 975x10,000,000
Explanation:
According to Dalton's atomic theory, all the atoms are individual, all the atoms of the same element are identical in properties and mass, the compound is formed from two or more kinds of the atoms, all the matter is made up of small atoms and the chemical reaction is a rearrangement of the atoms.
The discoveries which contradicts the components of Dalton's atomic theory from the given discoveries are:
Nuclear reactions can change an atom of one element into an atom of another element.
Atoms of a given element can have different numbers of neutrons.
Atoms contain smaller particles: protons, neutrons, and electrons.