<u>Answer;</u>
<em>D. The object’s weight changes, but its mass stays the same.</em>
<u>Explanation;</u>
- Mass is the amount of matter in a object, which is measured in kilograms. Mass of an object is measured using a beam balance. It is important to note that the mass of an object or a body remains constant, and does not vary from one place to another. For instance the mass of a person on the moon will be the same as when the person is on the earth surface.
- Weight on the other hand is the measurement of gravitational pull of an object. weight is measured using a spring balance and measured in Newtons. Weight varies from one place to another depending on the gravitational pull of a given surface.
When two waves intersect, they interfere and dan at the crossing point one resulting from well-defined characteristics - the combination of the two-product, but continue unchanged one to the other, each conveying his energy.
Answer:
Explanation:
Chemical properties only manifest when a chemical reaction occurs. Being reactive, flammable and explosive are chemical properties, because they involve chemical reactions: the substances are changed; the chemical bonds of some substances, called reactants, are broken, and the chemical bonds are created, forming other substances, called products.
Solubility is a<em> physical property</em> because during dissolution no new substances are formed. You can prove it when the solvent evaporates leaving behind the same original substance.
The the observation that the substance is <em>soluble</em> is describing a <em>physical property.</em>
Answer:
Explanation:
In order to calculate the change of any quantity you must substract the initial value of that quantity from the final value of the same quantity.
The concept of momentum is defined as,
Momentum = mass×velocity
So we calculate the change of momentum as,
Momentum change = final momentum - initial momentum
= mv - mu =m(v-u)
Where v = final velocity
u = initial velocity
m = mass of the object
So to calculate the momentum change of the car,
Change in momentum of the car = 1000×(8-1) = 1000×7 = 7000 Ns
Answer:
the capacitive reactance is reduced by a factor 2
Explanation:
The capacitive reactance is given by:
where
f is the frequency of the source
C is the capacitance
In this case, the frequency of the source is doubled:
f' = 2f
while the capacitance does not change. So the new capacitive reactance will be
so the capacitive reactance is reduced by a factor 2.