Answer:
Option C : 290 J
Explanation:
We can use conservation of energy to estimate the kinetic energy when the object hits the ground:
When the object is at its initial height of 15 meters, it velocity is zero (falls from this position), therefore the total energy it possesses is due to potential energy given by the expression:
Joules
At the moment the object hits the ground from its free fall, its potential energy is zero, while its kinetic energy must equal the rest. So at that moment the object's kinetic energy must be 294 Joules.
{Answer}
A- (10kg sphere and 30m)
{I hope this helps :) }
Answer:
see below
Explanation:
to find distance multiply speed by time
to compute speed the formula is distance divided by time
here is to learn the triangle
Search up distance, speed and time triangle
it is much easier to remember
hope this helps
please mark it brainliest
Answer:
461.73 K
Explanation:
Given that,
The mass of a bullet, m = 5.7 g
Speed of the bullet, v = 490 m/s
Half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half is transmitted to the tree.
Using the conservation of energy,
Where
x is the specific heat of lead, c = 130 J/kg K
So,
So, the increase in temperature of the bullet is 461.73 K.
Answer:
Explanation:
Water potential is defined as potential energy of water per unit volume with respect to potential energy of pure water. When some salt is dissolved in water , its potential energy becomes negative . Pressure on water increases its potential . Physical phenomena like osmotic pressure, surface tension etc influences the water potential.
Direction of flow of water is guided by water potential. Water always flows from higher water potential to lower water potential. In the given problem water will flow fro solution having water potential of -3.25 bars to that having water potential of - 6.25 bars.