Electromagnetic waves<span> are made of oscillating magnetic and electric fields, and like all </span>waves<span>, they carry energy</span>
Answer:
c
Explanation: kinetic energy being transferred from one object to another. Kinetic energy is the energy of mass in motion. The kinetic energy of an object is the energy it has because of its motion.
Answer: a
Explanation: Hope it helps
Answer:
(c) 8240 kN
Resultant hydrostatic force F = 8240 kN
Explanation:
Force can be expressed as;
F = ma
F = mg ......1
Where,
F = force
m = mass
a = acceleration
g = acceleration due to gravity
And we know that mass of an object is the product of
Density and Volume
m = pV
And volume V = area × height = Ah
m = pAh .....2
Substituting m into equation 1
F = pAhg = pghA ......3
Given;
Density of water p = 1000kg/m^3
g = 9.81m/s^2
Area A = 20m × 12m = 240m^2
h = depth/2 = 7/2 = 3.5m
Substituting the values into equation 3, we have;
F = 1000×9.81×3.5×240
F = 8240400 N
Resultant hydrostatic force F = 8240 kN
Barriers to physical fitness and activity may be someone's health (they may have a disease that prevents them from exercising). Other than this, there really is no limit to whom can exercise.
Hope this helps!
