Answer:
Maximum speed, v = 36 m/s
Explanation:
Given that,
The radius of the curved road, r = 120 m
Road is at an angle of 48 degrees. We need to find the maximum speed of stay on the curve in the absence of friction. On a banked curve, the angle at which it is cant is given by :
g is the acceleration due to gravity
v = 36.13 m/s
or
v = 36 m/s
So, the maximum speed to stay on the curve in the absence of friction is 36 m/s. Hence, this is the required solution.
Answer:
The ball will reach the ground in 0.8s
Option C
Explanation:
Given:
- Takes t = 0.8 s for ball to reach ground when thrown horizontal from top of a building.
Find:
If it had been thrown with twice the speed in the same direction, it would have hit the ground in how many second.
Solution:
- We know that the amount of time taken to hit the ground is determined by the vertical distance i.e height at which it is thrown. The displacement of ball from top is given by:
S_y = S_o + V_i,y*t + 0.5*g*t^2
- We know that the S_o = height of the building.
We also know that the ball os thrown horizontally; hence, y-component of initial velocity is zero. V_y,i = 0
0 = h + 0 + 0.5*g*t^2
- Hence, the time taken t is:
t = sqrt ( 2h / g)
- The time taken to reach the ground is independent of the initial speed. Hence, the ball will reach the ground in 0.8s .
Answer:
Proof:
|----------(R1)-------------(R2)---------|
Let the resistances be R1 , R2 connected in series. And the potential difference be V ;
We know that :
P1 = V²/R1 ..........(1) and
P2 = V²/R2 ...........(2)
In series combination , the net resistance is the algebraic addition of individual resistance :
R = R1 + R2
=> V²/P = V²/P1 + V²/P2
=> 1/P = 1/P1 + 1/P2
Explanation:
Copied it from a different brainly question that is this question. Please try to find it on brainly instead of asking it'd make it much easier.
Were you able to fix that problem?
Answer:
Both technicians are correct.
Explanation:
Printed circuits boards are copper layers attached to a dielectric plane with some design on it. This design is made to direction the current flow through a predefined path or electrical circuit. This way is easier to interconnect electronic devices instead of using cables for each connection.
Since the printed circuit board PCB its made of cooper, touching the printed circuit board may cause in the middle term corrosion and even rust, because the cooper in touch with the salt, sweat, and other stuff from the fingerprints can react in the metal surface, creating corrosion.
