Answer:
1.44 x 10⁻⁶ C
Explanation:
= charge on one sphere
= charge on other sphere
= Total charge on the two spheres = 40 μC
=
= 40 x 10⁻⁶
= (40 x 10⁻⁶) -
eq-1
= distance between the two spheres = 50 cm = 0.50 m
= magnitude of force between the two spheres = 2.0 N
Magnitude of force between the two spheres is given as
= 1.44 x 10⁻⁶ C
Answer:
Explanation:
Two identical sticky masses m are moving in the xy-plane, with their momenta at an angle of φ with one another. They are each moving at the same speed v when they collide at the origin of the coordinates and stick together. After the collision, the masses move at an angle −θ2 with respect to the +x axis at speed v2 .1. What was the angle φ?
from the principle of momentum
In a system of colliding bodies,we know that the total momentum before collision will equal to the total momentum after collision.
Take note that momentum is the product of mass and velocity
momentum before collision=momentum after collision
mass, m
u=initial velocity of the identical masses
v2=the common velocity after the collision
Note that the collision is inelastic , since they both moved with the same velocity
umcosφ+umcosφ=(m+m)v2cos−θ2
2mucosφ=2mv2cos−θ2
(B) The balloon will rise because the upward buoyant force is greater than its weight.
Explanation:
In order to evaluate what happens to the balloon, we need to compare the magnitude of the two forces acting on the balloon:
- Its weight, W, acting downward
- The buoyant force, B, acting upward
The weight of the balloon is given by:
where
m = 2.0 kg is the mass of the balloon
is the acceleration of gravity
Substituting,
The buoyant force on the balloon is given by:
where
is the air density
is the balloon's volume
is the acceleration of gravity
Substituting,
We observe that the buoyant force B is larger than the weight, so the balloon will accelerate upward, and the correct answer is
(B) The balloon will rise because the upward buoyant force is greater than its weight.
#LearnwithBrainly