Answer:
the branch of science concerned with the nature and properties of matter and energy. The subject matter of physics includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms.
Explanation:
Hope it is helpful.........
Electron Volts (eV) are units of energy that are convenient for use in describing energy scales of particles. One electron Volt is equal to 1.6 x 10^-19 Joules. Therefore, ten electron Volts are equal to 1.6 x 10^-18 Joules. In order to produce 20 Joules of energy from 10 eV photons, we would need 20 / (1.6 x 10^-18) = 1.25 x 10^19 photons.
Answer:
Explanation:
Time of flight is the time taken by the bulet in air. Time of flight is expressed as T = Usinθ/g where;
U is the initial velocity = 180m/s
θ is the angle of launch = 90° (Since the bullet is shot upwards)
g is the acceleration due to gravity = 9.81m/s²
T = 180sin90/9.81
T = 180/9.81
T = 18.35s
<em>Hence the bullet will spend 18.35s in air</em>
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The height covered by the bullet is the maximum height. Maximum height is expressed as;
H = u²sin²θ/2g
H = 180²sin²90/2(9.81)
H = 180/19.62
H = 9.17m
<em>Hence the bullet will go 9.17m high</em>
