Answer:
a) equal to its weight on the surface of the earth.
Explanation:
The mass of an object is a measure of the amount of matter it contains and is typically expressed in kilograms (kg) or grams (g). Weight, on the other hand, is the force of gravity acting on an object's mass. The weight of an object depends on the strength of the gravitational field it's in. On the surface of the Earth, where the gravitational field is relatively constant, an object's weight is directly proportional to its mass, and the two are equal. This relationship is described by the equation:
Weight (W) = Mass (m) x Acceleration Due to Gravity (g)
On the surface of the Earth, the acceleration due to gravity (g) is approximately 9.8 m/s². Therefore, an object's weight is equal to its mass times 9.8 m/s².
So, on the surface of the Earth, the mass of an object is equal to its weight. In deep space, where there is negligible gravitational force, an object's weight would be nearly zero, but its mass remains the same.
b. the month in which the star is observed
c. the Earth-Sun distance
d. the Sun's mass
B. Earth
C. Venus
D. Mercury
He used an experiment with gold foil to prove that an atom had a positive nucleus in the middle and was surrounded by negative electrons.
B.
He used thought problems to determine that matter could be divided into smaller pieces until it got to the atomic level.
C.
He used an experiment with Cathode Ray tubes to prove electrons existed when they changed the color of a gas.
D.
He used various experiments to prove that atoms of the same element have the same mass.
The difference between conductors and insulators is because of electronic structure of atoms and molecules.
Anywhere we have free electrons, we have a hard conductor where free electrons help in conduction.
In electrolytes, charged Ions do conduction.
Dielectrics (or insulators) don't have free electrons current.
Free electrons mean, the electrons that are not related with a specific atom, they are allowed to move nearby the crystal lattice.