The measured value of mass M in an experiment is M = 0.743 ± 0.005kg. The error in 2M is
1 answer:
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Answer:
<em>The ratio of gravitational force to electrical force is 3.19 x 10^-36 </em>
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Explanation:
mass of an alpha particle = 6.64 x kg
charge on an alpha particle = +2e = +2(1.6 x C) = 3.2 x
C
distance between particles = d
For gravitational attraction:
The force of gravitational attraction F =
where G = gravitational constant = 6.67 x m^3 kg^-1 s^-2
r = the distance between the particles = d
m = the mass of each particle
therefore, gravitational force = =
Newton
For electrical repulsion:
Electrical force between the particles =
where k is the Coulomb's constant = 9.0 x N•m^2/C^2
r = distance between the particles = d
Q = charge on each particle
therefore, electrical force = =
Newton
the negative sign implies that there is a repulsion on the particles due to their like charges.
Ratio of the magnitude of gravitation to electrical force =
==> <em>3.19 x 10^-36 </em>
Answer:
T=502.5N
Ax=171.8N
Explanation:
The computation of the tension T in the rope and the forces exerted by the pin at A is shown below:
vertical forces sum = Ay + Tsin20 + T - 245 - 883 = 0
Now
horizontal forces sum = Ax - Tcos70
Now Moment about B
-Ay × 4.8 + 245 × 2.4 + 883 × 1.8=0
Ay=453.6N
Now substitute in sum of vertical forces T=502.5N
Ax=171.8N
Answer:
6840 N
Explanation:
The force acting on the car can be found by using Newton's second law:
F = ma
where
F is the net force on the car
m is the mass of the car
a is its acceleration
For the car in this problem,
m = 1800 kg
Substituting,