Answer:
artificially generated radio waves are used for fixed and Mobile Radio communication broadcasting radar and other navigation systems communication satellites computer networks and innumerable other applications
The type of system that is associated with weather that is cold but sunny with almost no clouds in the sky is B. high pressure system.
Answer:
f = 0.83 ×10¹⁵s⁻¹
Explanation:
Given data:
Energy of ray = 5.5 ×10⁻¹⁹ J
Frequency = ?
Solution:
Formula:
E = hf
f = E/h
J = Kg . m².s⁻²
f = 5.5 ×10⁻¹⁹ Kg . m².s⁻² / 6.63 ×10⁻³⁴ m²Kg/s
f = 0.83 ×10¹⁵s⁻¹
Use this equation:
q = mc∆T
q is the heat energy your trying to find out
m is the mass of water (150g)
c is the specific heat capacity of water (4.18)
∆T is the temperature change (96.3-38.8)
so just multiply m c and ∆T to find q in joules
