Answer:
4.17 m/s²
Explanation:
We are told the reaction time is 0.2 s. Now, during this reaction time the car is going to travel an additional distance of
: x = u × t = 40 × 0.2 = 8 m
where u is the initial velocity of the car which is 40.0 m/s.
We are told that he had 200 m to stop before applying brakes. Thus, after applying brakes, he now has a distance to cover of; s = 200 - 8 = 192 m
Since vehicle is coming to rest acceleration would be negative, thus using Newton's equation of motion, we have;
v
² = u² - 2as
v = 0 m/s since it's coming to rest
u = 40 m/s
s = 192 m
Thus;
0² = 40² - 2(a)(192)
0² = 1600 - 384a
a = 1600/384
a = 4.17 m/s²
Answer:
The ideal transformer has no resistance, but in the actual transformer, there is always some resistance to the primary and secondary windings. For making the calculation easy the resistance of the transformer can be transferred to the either side.
Answer:
54,450,000,000 Joules
Explanation:
Kinetic Energy =
x x = 54,450,000,000 Joules
Answer:
• The electric field at any location in space, due to a dipole, is the vector sum of the electric field due to the positive charge and the electric field due to the negative charge.
• At a distance d from a dipole, where d >> 5 (the separation between the charges), the magnitude of the electric field due to the dipole is proportional to 1/d^3
• A dipole consists of two particles whose charges are equal in magnitude but opposite in sign
Explanation:
A dipole is a pair of magnetized, equal or oppositely charged poles the are being separated by a distance.
The statements about a dipole that are correct are:
• The electric field at any location in space, due to a dipole, is the vector sum of the electric field due to the positive charge and the electric field due to the negative charge.
• At a distance d from a dipole, where d >> 5 (the separation between the charges), the magnitude of the electric field due to the dipole is proportional to 1/d^3
• A dipole consists of two particles whose charges are equal in magnitude but opposite in sign
Answer:
Opposite
Explanation:
Waves that hit a fixed boundary return to the starting point on the <u>opposite </u>side that it began.
After striking, the wave gets reflected and it moves in the direction opposite to the initial direction.
Hence, it would mean that waves that hit a fixed boundary return to the starting point on the opposite direction.