Answer:
electromagnetic waves= LIGHT, TRAVELS IN A VACUUM, VIBRATIONS IN MAGNETIC FIELD
matter/mechanical= REQUIRES A MEDIUM, SOUND, COMPRESSIONS,
both= TRANSFERS ENERGY, AMPLITUDE, FREQUENCY, WAVELENGTH,
Explanation:
electromagnetic waves don't need particles/atoms to travel through whilst matter/mechanical waves do.
Answer:
10 °C
Explanation:
Applying
q = cm(t₂-t₁)............... Equation 2
Where q = heat energy, c = specific heat of ethanol, m = mass of ethanol, t₁ = initial temperature, t₂ = Final temperature.
Given: c = 2.44 J/g.°C, m = 300 g, q = 14640 J, t₂ = 30°C
Substitute into equation 2 and solve for t₁
14640 = 2.44×300(30-t₁)
14640 = 732(30-t₁)
732(30-t₁) = 14640
(30-t₁) = 14640/732
(30-t₁) = 20
t₁ = 30-20
t₁ = 10 °C
Hot air always goes for the top of air and its making pressure on piston which makes piston move up.
True. If the amount displaced is more than the mass, it floats. If the amount is less than the mass, it will sink.
Answer:
These regions are known as compressions and rarefactions respectively. The compressions are regions of high air pressure while the rarefactions are regions of low air pressure.
Explanation:
