Combustion, also known as burning, is the basic chemical process of releasing energy from a fuel and air mixture. In an internal combustion engine (ICE), the ignition and combustion of the fuel occurs within the engine itself. The engine then partially converts the energy from the combustion to work.
Answer:
Dot matrix printers, Daisy - wheel printers, ball printers.
Answer:
(a)
(b)
(c)
(d)
Explanation:
Given:
Kinetic Energy of an electron,
radius of the orbit,
we have:
mass of an electron,
charge on an electron,
(a)
we know:
(b)
<em>We also have the relation after the comparison of forces(centripetal and magnetic) on a moving charge in a magnetic field as:</em>
...........................(1)
where:
B = magnetic field normal to the plane of circulating charge
putting respective values in eq. (1)
(d)
angular speed:
∴Time taken for 1 radian:
Now time take for 1 circulation i.e. 2π radians(Time period):
(c)
we know frequency :
Answer:
1.26m/s; 4.96m/s
Explanation
Acceleration is defined as the change I'm velocity of an object with respect to time.
Mathematically,
Acceleration (a) = change in velocity (v-u)/time (t)
Where v is the final velocity
u is the initial velocity
From the equation, it can be deduced that;
v = u+at
If the runner had an initial vertical velocity of -0.7 m/s over a period of 0.2seconds, its final velocity;
v = (-0.7)+9.81(0.2) (a=g=9.81m/s²)
v = -0.7+1.962
v = 1.26m/s
If the runner had an initial horizontal velocity of 3 m/s over a period of 0.2seconds, its final velocity;
v = 3+9.81(0.2)
v = 3+1.962
v = 4.96m/s
Answer:
E = 15.7 KJ/mol
Explanation:
The number of vacancies in a metal is given by
n = n₀
They tell us that
n = 5 no
We replace
5 n₀ = n₀ e^{-E/KT}
-E / KT = ln 5
E = KT ln 5
E = 1,381 10⁻²³ 1170 ln 5
E = 2.6 10⁻²⁰ J
To take (J / mol) we multiply between Avogadro's number
E = 2.6 10⁻²⁰ 6.022 10²³
E = 1.57 10⁴ J / mol
E = 15.7 KJ/mol