Answer:
K.E = 463.04 k J
P = 23.14 Watt
Explanation:
given,
mass of automobile = 1200 kg
velocity = 50 km/h
= 50 × 0.278
= 13.9 m/s
kinetic energy = 
=
K.E = 115.93 k J
vehicle accelerated to velocity = 100 km/h
= 100 × 0.2778
= 27.78 m/s
kinetic energy =
=
K.E = 463.04 k J
work done = change in kinetic energy
= 463.04 - 115.93
= 347.11 J
Power = 
Power =
P = 23.14 Watt
Answer: Student 2
Explanation: Iron nail and a paperclip are conductors because they are made of metal. A rock, rubber band, and wooden stick are insulators because they cannot conduct electricity.
Covalent bonds form when electrons are shared between atoms and are attracted by the nuclei of both atoms. In pure covalent bonds, the electrons are shared equally. In polar covalent bonds, the electrons are shared unequally, as one atom exerts a stronger force of attraction on the electrons than the other.
Latitude or distance from the equator. Temperatures drop the further an area is from the equator due to the curvature of the earth. In areas closer to the poles, sunlight has a larger area of atmosphere to pass through and the sun is at a lower angle in the sky.
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Explanation:
Acceleration is change in velocity over change in time.
a = Δv / Δt
a = (0 m/s − 7.2 m/s) / (12 min × 60 s/min)
a = -0.01 m/s²
