Answer:
1 A = 1 C/s. Charge on 1 electron e = 1.6 × 10^(-19) C. No of electrons needed for 1 C of charge = No of electrons that flow in 1 s = (1/1.6 × 10^(-19)) = 6.25 × 10^18.
M = 45.0 g in Kg 0.045 Kg
speed = 75.0 m/sec
Δp = m * speed
Δp = 0.045* 75.0
Δp = 3.375 kg.m/s
hope this helps!
Answer:
0.3 seconds approximately
Explanation:
Given that the height of the building is 55.9 m and cement block accidentally falls from rest from the edge of a 55.9-m-high building. The initial velocity of the block will be equal to zero. The final velocity will be achieved by using the formula:
V^2 = U^2 + 2gH
Where g = 9.8 m/s^2
H = 55.9m
V^2 = 0 + 2 × 9.8 × 55.9
V^2 = 1095.64
V = sqrt(1095.64)
V = 33.1 m/s
The velocity When the block is 11.2 m above the ground will be 33.1 m/s and the height h = 11.2 - 1.7 = 9.5 m
The time of escape can be calculated by using the formula;
h = Ut + 1/2gt^2
9.5 = 33.1t + 1/2 × 9.8 × t^2
9.5 = 33.1t + 4.9t^2
4.9t^2 + 33.1t - 9.5
By using quadratic formula to calculate the time, the negative value is ignored and the positive values will be the time the man has to get out of the way.
Please find the attached file for the remaining solution.
Answer:
<em>20m/s</em>
Explanation:
Given
Velocity = 40m/s
angle = 30°
Vertical component = Vsin theta
Substitute into the formula
Vy = 40sin30
Vy = 40(0.5)
Vy = 20m/s
<em>Hence the vertical component of the velocity right before the ball hits the ground is 20m/s</em>
Answer:
A
Explanation:
insects undergo Pupal life cycle