Answer:
Because the mass of the the earth is way bigger than the mass of a classmate
Explanation:
Formula for force of gravity is;
F = Gm1•m2/r²
Where m1 and m2 are the two objects masses in question.
So, m1 may be your mass while m2 may be either the mass of the earth or your classmate.
The bigger the mass of m2, the more the force of gravity
Mass of the earth is about 5.97 × 10^(24) kg is which is so much more bigger than that of the classmate which is a human being.
Therefore, the reason why you may feel the effect of the gravitational forces between you and Earth, but not between you and a classmate is probably because the mass of the the earth is way bigger than the mass of a classmate
B. The element nitrogen is made up only of nitrogen atoms.
Explanation:
Dalton stipulated , in his theory, that all the atoms of pure elements were identical. However different elements had different kinds of atoms that differ in their size and mass. The other stipulations of Dalton's theory were that atoms are the smallest unit of mass and were indivisible – this was later rebutted by advanced atomic theories .
Another major contribution by Dalton's theory is that chemical reactions involved the rearrangement of atoms observing the law of conservation of mass,
Answer:
1) 94.0° C, 2) 34.7°C
Explanation:
1)
Q=mcΔt° =mc(t2 - t1)
2350 J = 85.0 g* 0.385 J/(g*°C) *(t2 - 22.2°C)
t2 - 22.2°C = 71.81°C
t2 = 94.0° C
2)
Q=mcΔt° =mc(t2 - t1)
- 2070 J = 75.0 g * 0.903 J/(g*°C) *(t2 -65.3°C)
t2 - 65.3°C = - 30.56°C
t2 = 34.7°C
Answer:
i dont really have explaining but see green leaf have some amount of water and chlorophyll so it doesn't get burnt and dry leaves lose water and have no amount of them so they get burnt
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Chemical properties
The process of changing into different substances is known as a chemical change and a substance exhibits its chemical properties during such a change.
