Answer: B
Im not sure, if i am right then mark as brainiest please (:
Electric Field Strength E = Force F/ Charge q
E = F/q
Force , F = E*q
But charge on an electron q = 1.6 * 10⁻¹⁹ C
E = 3 * 10³ N/C from the question.
Force F = 3* 10³ * 1.6 * 10⁻¹⁹
F = 4.8 * 10⁻¹⁶ N.
Electrostatic force F = 4.8 * 10⁻¹⁶ N
<span>500 hz means 500 times in a second therefore its 2.</span>
Answer:
F = - K X force constant for spring
a = F / m maximum acceleration
F = 4.5 kg * 26 m/s^2 = 117 Newtons
(A) K = 117 N / .038 m = 3079 N/m
ω = (K/M)^1/2 = (117/5)^1/2 = 4.84 / sec
(B) f = ω / 2 pi = 4.84 / 6.28 = .77 /sec
(C) P = 1 / f = 1/.77 = 1.30 sec
Answer:
See explanation
Explanation:
In this exercise, we need to use the law of conservation of angular momentum which is:
I1*W1 + I2*W2 = (I1 + I2)*W2'
Where:
I: moment of innertia.
W: angular velocity
Now let's call 1 the runner and 2, the turntable. the system would be W2'.
The angular speed of the runner, we can calculate that with the following expression:
W = V/r
so:
W1 = 2.5 / 3.6 = 0.694 rad/s
The innertia is calculated with the expression:
I = m*r²
I = 60 * 3.6 = 216 kg.m²
I2 and W2 are provided in the exercise, so, replacing all the data in the conservation of angular momentum, let's solve for W2'
(216*0.694) + (-0.190*81) = (81 + 216)W2'
134.514 = 297W2'
W2' = 134.514 / 297
W2' = 0.453 rad/s
