Newton's second law of motion can be used to calculate weight.
Answer:
E = 0.93 10⁻⁶ N/C, 24º NorthEast
Explanation:
The electric force is related to the electric field by the relation
F = q E
where the bold letters indicate vectors and q is a scalar electric charge.
Using this equation the electric force is in the same direction as the electric field.
The magnitude of the field is
E = F / q
the charge they give us is q = 8.7 C
let's calculate
E = 8.1 10⁻⁶ / 8.7
E = 0.93 10⁻⁶ N / C
In summary, the magnitude of the electric field is E = 0.93 10⁻⁶ N/C and its direction is 24º NorthEast
Answer:
Explanation:
A B C
PE mgh = 450(9.8(47) = 207 kJ 0 J 450(9.8(23) = 101 kJ
KE = ½mv² = ½(450)0² = 0 J 207 J 207 - 101 = 106 kJ
Answer:
R₂ = 3.31 m
Explanation:
For this exercise let's use trigonometry. Let's see the angle of the full moon
θ = x / R
Where x is the diameter of the moon and R the distance from the Earth to the Moon, the angle is measured in radians
x = 2 R
x = 2 1.74 10⁶
x = 3.48 10⁶ m
The distance is
R = 3.84 10⁸ m
Let's look for the supported angle
θ = 3.48 10⁶ / 3.84 10⁸
θ = 9.06 10⁻³ rad
For the coin to cover the moon it must have the same angle, let's look for the different
θ = x₂ / R₂
x₂ = 3 cm = 0.03 m
R₂ = x2 / θ
R₂ = 0.03 / 9.06 10⁻³
R₂ = 3.31 m
This distance in much greater than the arm length
Answer: When a liquid or gas is heated, the molecules move faster, bump into each other, and spread apart. Because the molecules are spread apart, they take up more space. ... The molecules move more slowly and take up less space. Therefore temperature can affect density.
Explanation: