Probability of it being a boy is 17/25 which is .68
The strength of the gravitational force between two objects depends on two factors, mass and distance. the force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled. increases, the force of gravity decreases.
Answer:
I think that the answer might be d
Answer:
1. acceleration value
2. 20 m
3a. when you throwing somethinb upward
3b. when a thing reach maximum height after throwing upward
4. (entire only) velocity = diaplacement/ time = 0/91 = 0
speed = distance/time = 200/91 = 2.2 m/s
5. (40-20)/4 = 5 m/s²
6. displacement using phytagoras get 50 m
velocity = displacement/time = 50/(6+4) = 5 m/s
7. 0, it turn back to the base
8. speed = distance/time = (240*2)/(4+6) = 48 km/h
9. s = (4+14)*3/2 =27 m
Answer:
a) 0.0875A
b) 2.06*10^-6m/s
Explanation:
given
Diameter, d = 2.6mm = 0.0026m
Charge, Q = 420C
Time, t = 80mins = 80*60s = 4800s
Concentration of electrons, n = 5*10^28
To find the current, recall that q = it
Therefore, i = Q/t
Current, i = 420/4800
i = 0.0875A
To get the drift velocity, recall that I = n*q*Vd*A
A = πd²/4
A = π*0.0026²/4
A = 5.3*10^-6m²
Then, Vd = I/nqA
Vd = 0.0875/(5*10^28 * 1.6*10^-19 * 5.3*10^-6)
Vd = 0.0875/42400
Vd = 2.06*10^-6m/s
Note, low Vd causes low current.
Therefore, the current is 0.0875A and the Vd is 2.06*10^-6m/s
