1200 watts = 1200 joules per second
(1.8 x 10⁵ joules) / (1,200 joules/sec) = 150 sec = <em>2.5 minutes
</em>
I don’t know this but I really wanna help so I’m sorry!!!!!!
Answer:
c. a self-contained "packet" of electro-magnetic energy
Explanation:
Photon is a quantum of energy packet of electromagnetic radiation, it contains all the properties of electromagnetic radiation being the fundamental component of electromagnetic energy.
It behaves like a wave when it propagates in a medium but transfers energy like a particle when collides with some other matter.
Answer:
A rectangular object may have different areas for different sides.
If that object is placed on a hand, the area of its side does not affects the Force. However the pressure it puts on the hand is affected by the area.
Explanation:
The Force that object applies on the hand is given as the product of its mass and gravitational acceleration 'g'. Hence area does not affect the Force and it is constant.
F = mg
Pressure is defined as the Force per unit area.
P = F/A
As the surface area decreases and Force remains constant, the pressure on the hand increases and vice versa.
Speed=distance/time, rearranging gives speed*time=distance therefore the first section of the journey yielded a total distance of 40km, the second journey was stated to be 20km which was completed in (20/30)*60=40minutes. Therefore the total journey was 60km which was completed in 1hr40 minutes so the average speed was (60/1.66..)=36km/h.
