That depends on the wavelength of the electromagnetic radiation.
-- If the waves are long, then we use them for radio, TV, and cellphones.
-- If the waves are shorter than that, then we use them for GPS in the car.
-- If the waves are shorter than that, then we use them to heat meatloaf
in the microwave oven.
-- If the waves are shorter than that, then they warm us and they
make our plants grow ... like the ones we eat.
-- If the waves are shorter than that, then our eyes use them to see with.
-- If the waves are shorter than that, then they tan our skin.
-- If the waves are shorter than that, then they can cause cancer on
our skin.
-- If the waves are shorter than that, then they can cause cancer and
other diseases in places inside our body.
Answer:
ix chemical elements that comprise Group 2 of the periodic table
Explanation:
Calcium, Magnesium, Barium, Beryllium, Strontium, and Radium are alkaline earth metals.
Answer:
evaporation to condensation to precipitation.
For radio broadcasting, in electricity meters, in any generator.
Answer:
p = 10 kg-m/s
Explanation:
Given that,
Mass of ball 1, m₁ = 2 kg
Speed of ball 1, u₁ = 3i m/s (due East)
Mass of ball 2, m₂ = 4 kg
Speed of ball 2, u₂ = 2j m/s (due North)
We need to find the magnitude of the momentum of this system just after the collision. As we have seen that two balls are moving perpendicular to each other.
Momentum of ball 1, p₁ = m₁u₁
p₁ = 2× 3 = 6 kg-m/s (due east)
Momentum of ball 2, p₂ = m₂u₂
p₂ = 4× 2 = 8 kg-m/s (due north)
Net momentum is given by :
So, the magnitude of the momentum of this system just after the collision is 10 kg-m/s.
