Answer:
KE increases and PE decreases.
Explanation:
<u>POTENTIAL ENERGY (PE)</u>:
The potential energy of the rock depends upon the height of the rock, as given by the following formula:
P.E = mgh
Therefore, the potential energy will be highest at the initial point due to the highest height attained by rock. As the rock falls, its height will decrease as a result its <u>potential energy will also decrease</u>.
<u>KINETIC ENERGY (KE)</u>:
The kinetic energy of the rock depends upon the velocity of the rock, as given by the following formula:
Therefore, the kinetic energy will be zero at the initial point due to the zero velocity of the rock. As the rock falls, its velocity will increase as a result its <u>kinetic energy will also increase</u>.
Hence, the correct option will be:
<u>KE increases and PE decreases.</u>
Possibly all of them, and then a few more. Tough things bridges ....
Answer for 5 kitchen tools
(1) wooden spoon - often made from bamboo, is used for mixing and when cooking and stirring hot foods. A wooden spoon will not transfer heat to the hand like a metal spoon.
(2) wire whisk - many wire loops held together in a handle - used to whip eggs or cream or add air to a thin batter.
(3) rubber scraper - A smooth rubber flat spoon on a handle, Used for mixing, folding soft ingredients and to scrape ingredients from a bowl.
(4) peeler - sharp curved metal scraper in a handle - Used to remove the outer layer of fruits and vegetables.
(5) Paring knife - small knife that fits in the hand. It’s an all purpose small knife used for small cuts, garnishes, paring or coring.
Answer:
26.82m/s
Explanation:
Given
Mass = m= 0.4kg
Initial Velocity = u = 0
Charge = 4.0E-5C
Distance= d = 0.5m
Object Charge = 2E-4C
First, we'll calculate the initial energy (E)
E = Potential Energy
PE = kQq / d
Where k = coulomb constant = 8.99E9Nm²/C²
Energy is then calculated by;
PE = 8.99E9 * 4E-5 * 2E-4 / 0.5
PE = 143.84J
Energy = Potential Energy = Kinetic Energy
K.E = ½mv² = 143.84J
½mv² = ½ * 0.40 * v² = 143.85
0.2v² = 143.85
v² = 143.85/0.2
v² = 719.25
v = √719.25
v = 26.81883666380777
v = 26.82m/s
Hence, the object is 26.82m/s fast when the cart moving is very far (infinity) from the fixed charge
FE is iron CO is cobalt CU is copper K is potassium NI is nickle MN is magnemese
