The answer should be aphelion.
Objects should be cooled before their mass is determined on a sensitive balance because it could damage the balance. Also, because it would give you wrong reading of the mass. Hot objects would warm the air around it. A warm air would expand and would produce convection as it rises causing to give the object a mass that is less than the actual. Another reason would be it would cause instability in the readings, the mass would fluctuate every now and then due to the convection currents around the object. It is always recommended to weigh the masses of objects that are in room temperature.
Answer:
1.52m/s
Explanation:
Using the law of conservation of momentum
m1u1 + m2u2 = (m1+m2)v
m1 and m2 are the masses
u1 and u2 are the initial velocities
v is the final velocity
Substitute the given values into the formula
0.013(270)+2(130) = (270+130)v
3.51+260 = 400v
263.51 = 400v
v = 400/263.51
v = 1.52m/s
Hence the velocity after the bullet emerges is 1.52m/s
<h3><u>Answer;</u></h3>
<u> = 0.2858 N, attractive </u>
<h3><u>Explanation;</u></h3>
Since the currents are parallel, the force on each wire will be attractive, toward the other wire. Therefore; to calculate the magnitude of force we use the formula;
F2 = (μ₀/2π)(I₁I₂/d)I₂
Where;
μ₀ = constant = 4π × 10^-7 H/m,
I₁, I₂ are the currents,
L s the length o the wire,
d is the distance between these two wires
if current are in same direction, they exert attractive force on each other and if currents are in opposite direction, they exert repulsive force
Therefore;
F₂ = (4π × 10^-7 T.m/A)/2π) × ((35 A)²/ 0.03 m)× 35 m
<u> = 0.2858 N, attractive </u>
Answer:
Explanation:
The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number, sogginess. The atomic number of an element is the number of protons in the nucleus of an atom of that element.