Answer 1) Option D) Weight
Explanation : As per newton's second law, The weight of the object directly proportional to the sum of the mass of the object, and its gravity. In formula it is F = m.g; here mass remains the same. As the gravity changes the weight of the object changes accordingly.
Answer 2) Option D) Radiant energy.
Explanation : Radiant energy is the energy of electromagnetic waves, which includes, Light rays, X-rays,Microwaves and Radiowaves. It has lighting, heating and all other forms of radiant energy in it.
Answer 3) Option A) The cork is less dense than the water.
Explanation : The piece of cork has less weight than the amount of water, it also has less density in comparison with water which allows the cork to float on it.If the density would have been greater than the water it would have sinked in then.
Answer 4) Option C) Energy is not created or destroyed.
Explanation : In an ordinary chemical reaction, as per the law of energy conservation; energy can be neither created nor be destroyed it can be only transformed from one form to another form.
Answer 5) Option B) Mass.
Explanation : Mass would remain consistent no matter where the location is. All other options will change according to the location example on earth and on moon.
Answer 6) Option C) Radiant energy is converted to electrical energy.
Explanation : The energy conversion which occurs when a solar panel uses a light to provides power to a house is radiant energy getting converted to electrical energy. As radiant energy has solar energy classified in it which is converted in the form of electrical energy.
Answer 7) Option A) Balance and graduated cylinder
Explanation : A balance would help to note down the changes in the weight or mass of the object, and the graduated cylinder will help to determine the volume changes.
It works well with an irregularly shaped object, as it can be immersed in water and measure the amount of water it displaces.
Answer 8) Option C) Graduated cylinder
Explanation : A graduated cylinder is an ideal tool to measure the volume of the object as it will give precise volume changes by displacement of the water when the object is immersed in it.
Answer 9) Option A) Average kinetic energy of the particles in a substance.
Explanation : Temperature changes is observed to be the measure of the average kinetic energy of the atoms or molecules in the system. As per the zeroth law of thermodynamics which states that there is no heat transferred between two objects in thermal equilibrium; therefore, they are said to be as the same temperature.
Answer 10) Option A) Reaches the bottom of a hill.
Explanation : The roller coaster reaches its maximum kinetic energy when reaches at the bottom of a hill.
When the roller coaster cart starts to move over the top of the hill, its potential energy starts to transform into kinetic energy.
At the bottom of the hill, there will be no potential energy as it has been all be converted to kinetic energy.
