Answer:
Bulb
Explanation:
Bulb and fluorescent tubes convert electrical energy into light energy. The best alternative in this case will be a bulb. The switch controls flow of current hence used to put the circuit on and off but doesn't do any conversion.
C. By preventing flooding, creating reservoirs, and providing water for irrigation
Explanation:
It is known that the relation between force and acceleration is as follows.
F = -ma ............ (1)
Also, acceleration (a) = ......... (2)
The given data is as follows.
v = 0, u = 14 m/s, s = 1
Therefore, putting the values of expression (2) into expression (1) as follows.
F =
=
= 5978 N
thus, we can conclude that net force on the person if he or she is wearing a seat belt and if the air bag deploys is 5978 N.
Answer:
8 ms⁻¹
Explanation:
Kinetic energy is the energy possessed by a moving object solely due to its motion.
You can get the K.E. of an object using the equation,
K.E. = (1/2)mv²
So you get, for lorry,
K.E. = (1/2)4000×4² -----------(1)
for car,
K.E. = (1/2)1000×v²---------------(2)
(1)=(2)
(1/2)4000×4² = (1/2)1000×v²
y these two equations, we get, v = 8 ms⁻¹