Sound waves in air (and any fluid medium) are longitudinal waves because particles of the medium through which the sound is transported vibrate parallel to the direction that the sound wave moves.
Answer:
2019 light bulbs
Explanation:
So the electrical energy consumed by each 59-W light bulb within 7 hours is the product of the power and time duration
E = Pt = 59 * 7 = 413 Wh or 0.413 kWh
If each light bulb consumes 0.413 kWh, then the total number of light bulbs needed to consume 834 kWh would be
834 / 0.413 = 2019 light bulbs
X-ray)
because Electromagnetic waves are in act
Weight=mass x gravitational force
W=60 x 1/100 x 10
W=60 x 0.1
W=6N
I believe it is B, the object that reflects a lot of light, absorbs a little light, and transmit almost no light.
