Wood has a lower density than water, and thus the upward buoyant force provided by the water is equal to the weight of the wood submerged.
Penny has a smaller density
I would say wood would be ur best option.
Answer: -39.2 m/s or 39.2 m/s directed downwards
Explanation:
This situation is a good example of Free Fall, where the main condition is that the initial velocity must be zero , and the acceleration is constant (acceleration due gravity).
So, in order to calculate the final velocity of the rock just at the moment it hitsthe bottom of the cliff, we will use the following equation:
Where:
is the acceleration due gravity (directed downwards)
is the time it takes to the rock to fall down the cliff
This is the rock's final velocity and its negative sign indicates it is directed downwards
Answer:
it's d
Explanation:
have you ever baked a cake? Everytime you put cake batter into the oven, it takes a few hours for it to start turning into cake.
Vi = vf + ( a.t)
0 m/s (rest) = 80 m/s + (a.20s.-1)
a.20.-1= -80, we check if this is true; = 0 m/s= 80 + -80 = 0 ITS TRUE.
so a.20.-1= -80, a= 80/20 , Answers a= 4 m/s
In Rutherford's gold foil experiment, some of the positive particles would pass through the foil and some would bounce off. This led to a new theory that all of the positive subatomic particles were in the center of the atom instead of evenly spread throughout.