The last 2. They both are correct. I hope this helps.
Answer:
(A) = 2.13 s
(B) = 0.47 Hz
(C) = 0.25 m
(D) = 0.74 m/s
Explanation:
number of oscillations (n) = 15
time (t) = 32 secs
start point (L1) = 13 cm = 0.13 m
End point (L2) = 63 cm = 0.63 m
(A) period = time / number of oscillation
= 32 / 15 = 2.13 s
(B) frequency = 1 / period
= 1 / 2.13 = 0.47 Hz
(C) Amplitude = 0.5 ( L2 - L1 )
= 0.5 ( 0.63 - 0.13 )
= 0.25 m
(D) max speed = (2π / T) x A
= (2π / 2.13) x 0.25
= 0.74 m/s
Answer:
Burning match represents exothermic reaction.
Explanation:
Exothermic reaction:These are the reaction which releases energy into the surroundings.
Endothermic reaction:These are the reaction which absorbs energy from the surroundings.
Burning of the match stick is an Exothermic reaction.This is because amount of energy required to burn the match is very less than of the energy given out by the match on burning.
Input Energy < Output Energy
Answer:
<h2>1000 N</h2>
Explanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 0.25 × 4000
We have the final answer as
<h3>1000 N</h3>
Hope this helps you
<span>For a particle moving in the +y and in a -x B field the force will be in the + z direction
Magnitude = q*v*B = 1.60 x 10^-19*1930*2.04 x 10^-3 = 0.63x10^-18N
a) the electric field creates a force = E*q in the +z direction
Fe = 4.27*1.60x10^-19 = 6.83 x 10^-19N
So F = 0.63 x 10^-18 + 6.83 x 10^-19 = 1.31 x 10^-18N
b) Now F = 0.63 x 10^-18 – 6.83 x 10^-19 = 0.5 x 10^-19N
c) Now add them as vectors so
F = sqrt((0.63 x 10^-18)^2 + (6.83 x 10^-19)^2) = 0.86 x 10^-18N</span>
