Answer:
10 m/s
Explanation:
Use the kinetic energy formula:
KE=(1/2)mv^2
I always remember it as Kevin is half-mad, and very square.
25J = (1/2)*0.5kg*(v^2)
50J = 0.5kg*(v^2)
100J = v^2
v = 10 m/s
Check it:
KE = (1/2)*0.5*(10^2)
KE = 25J
yep, it's right!
Answer:

Explanation:
given data:
density of water \rho = 1 gm/cm^3 = 1000 kg/m^3
height of water = 20 cm =0.2 m
Pressure p = 1.01300*10^5 Pa
pressure at bottom



= 1.01300*10^5 - 1000*0.2*9.8
= 99340 Pa
h_[fluid} = 0.307m


Answer:
The time constant becomes twice.
Explanation:
= Time constant of the L-R circuit
= Inductance of the inductor
= Resistance of the resistor
Time constant of the L-R circuit is given as

= initial time constant of the L-R circuit = 
= final time constant of the L-R circuit
= Initial inductance of the inductor = 
= Initial inductance of the inductor = 
For the same resistance, the time constant depend directly on the inductance, hence

Answer:
a)
b) 
c)
d) 
e)
f) 
g) p = -5.77 h) q=5
Explanation:
Diagram for given question is attached below in fig 1
<h3>Part (a) (b)</h3>
for vector 
θ = 0°

<h3>Part (c) (d)</h3>
for vector 
θ = 30°

<h3>Part (e) (f)</h3>
for vector 
θ = 90°

<h3>Part (g) (h)</h3>



