What is the Kinetic Energy of a ball moving with a velocity of 2.75m/s and a mass of 2kg? Use the formula KE = 1/2 mv squared

Step by Step solutions for finding kinetic energy

Given:

M= 2kg

V= 2.75m/s

Unknown:

KE or kinetic energy of the ball moving

Formula:

KE= 1/2 m v²

Solution:

KE= 1/2(2kg)(2.75 m/s)²

KE= (4kg)(7.56 m²/s²)

Final

KE= 30.25 kg.m²/s² simplify as 30.25 J

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.