Answer:
Explanation:
Here we have an inelastic collision problem. We can use the momentum (p = mv) conservation law in each component of the displacement.
So,
<u>X-component:</u>
(1)
Now,
- v(i1x) is 0, because the first car just moving in y-direction
- v(i2x) is 164 km/h
- v(f1x)=v(f2x), because both cars stick together after the collision, so they have the same x-component velocity.
Then, using this information we can rewrite the equation (1).
<u>Y-component:</u>
(2)
We can do the same but with the next conditions:
- v(i1y) is 239.44 km/h
- v(i2y) is 0, because the second car just moving at the x-direction
- v(f1y)=v(f2y), because both cars stick together after the collision, so they have the same y-component velocity.
Then, using this information we can rewrite the equation (2).
Now, as we have both components of the final velocity, we can find the angle East of North. Using trigonometric functions, we have:
I hope it helps you!
Answer:
B. reading glass
Explanation:
A large magnifying lens that is usually attached to a handle and that is used to facilitate reading as of fine print also as on map details
I think it’s output because output work is work done by a machine
Answer:
100
Explanation:
= Resistivity of axon
r = Radius of axon
t = Thickness of the membrane
= Resistivity of the axoplasm
Speed of pulse is given by
So, radius is given by
If radius is increased by a factor of 10 new radius will be
So, The radius will increase by a factor of 100.
Answer:
v = 4.10 10⁻³ m / s
Explanation:
For this exercise we will use Newton's second law where the force is magnetic
F -W = m a
As the field is directed to the north and the proton to the east, using the rule of the right hand the force is vertical upwards, the force balances the weight the acceleration is zero
F = W
q v B = m g
Let's calculate the speed
v = m g / (q B)
v = 1,673 10⁻²⁷ 9.8 / (1.6 10⁻¹⁹ 2.5 10⁻⁵)
v = 4.10 10⁻³ m / s