Answer:
Explanation:
The electric field that will balance the weight of the oil drop can be calculated using the following:
electric force, F = e E ( where, e is the charge of an electron and E is the electric field)
weight, W = 2.5 ×10⁻¹⁴ N
e E = W
Substitute the values:
This quantity ρ is known as the density<span> , which is usually defined as the mass per unit volume: ρ = m/V. The volume units milliliter (mL) and cubic centimeter (cm</span>3<span>) are almost identical and are commonly used interchangeably. The general meaning of </span>density<span> is the amount of anything per unit volume.</span>
The correct answer is C. A scientific inquiry is the process of gathering evidences, using the natural world. Using these evidences, the explanations are proposed. A sceintific inquiry leads to the develoment of hypthesis, which explains a particular process by a set of observations.
When an object is moving with uniform circular motion, the centripetal acceleration of the object d. is directed toward the center of motion.
Answer: a) The acceletarion is directed to the center on the turntable. b) 5 cm; ac= 0.59 m/s^2; 10 cm, ac=1.20 m/s^2; 14 cm, ac=1.66 m/s^2
Explanation: In order to explain this problem we have to consider teh expression of the centripetal accelartion for a circular movement, which is given by:
ac=ω^2*r where ω and r are the angular speed and teh radios of the circular movement.
w=2*π*f
We know that the turntable is set to 33 1/3 rev/m so
the frequency 33.33/60=0.55 Hz
then w=2*π*0.55=3.45 rad/s
Finally the centripetal acceleration at differents radii results equal:
r= 0.05 m ac=3.45^2*0.05=0.50 m/s^2
r=0.1 ac=3.45^2*0.1=1.20 m/s^2
r=0.14 ac=3.45^2*0.14=1.66 m/s^2
