Answer:
the correct one is 3
Explanation:
The magnetic force is described by the expression
F = q v x B
The bold indicate vectors, q is the charge, v the velocity and B the magnetic induction
This expression can be written in scalar form
F = q v B sin θ
where θ is the angle between velocity and induction.
The direction of the force is perpendicular to the vectors.
When revising this expression the force depends on the electric charge, the speed of the particle and the induction of the magnetic field
therefore, checking the possible answers, the correct one is 3
Radiation can happen even if there are no particles
hope this helps....
Answer:
The total charge on the rod is 41.18 nC
Explanation:
Given;
length of glass rod, L = 10 cm = 0.1 m
radius of the rod, r = 4 cm = 0.04 m
Force of repulsion = 940 μN = 940 × 10⁻⁶ N
Charge on the bead = 6.5 nC = 6.5 × 10⁻⁹ C
Charge on the rod, Q = ?
From coulomb's law;
Where;
F is the force of repulsion in N
q₁ and q₂ are the charges on the bead and rod
R is the resultant distance between the two charges;
K is coulomb's constant = 8.99 x 10⁹ Nm²/C²
Therefore, the total charge on the rod is 41.18 nC
Metal is a fantastic conductor of heat. glass also can conduct heat to a certain degree if enough heat is applied, a common saying in chemistry labs is that cold glass and hot glass look the same. wood only goes as far as making a fire, otherwise you can't really make much use of it.
True, radio waves do have longer wavelengths than x-rays.