66.7 Watts
Explanation:
Let
ohms,
ohms and
ohms. Since
and
are in parallel, their combined resistance
is given by

or

The total current flowing through the circuit <em>I</em> is given

where

Therefore, the total current through the circuit is

In order to find the voltage drop across the 6-ohm resistor, we first need to find the voltage drop across the 1-ohm resistor
:

This means that voltage drop across the 6-ohm resistor
is 20 V. The power dissipated <em>P</em> by the 6-ohm resitor is given by

Answer:
The net friction force is 8.01 N
Explanation:
Net friction force = mass of hockey puck × acceleration
From the equations of motion
v^2 = u^2 + 2as
v = 40 m/s
u = 0 m/s (puck was initially at rest)
s = 30 m
40^2 = 0^2 + 2×a×30
60a = 1600
a = 1600/60 = 26.7 m/s^2
The acceleration of the puck is 26.7 m/s^2
Net friction force = 0.3 × 26.7 = 8.01 N
The moon affects the tides by causing high and low tides.
Answer:

Explanation:
Given that,
Mass of ball 1, 
Initial speed of ball 1, 
Mass of ball 2, 
Initial speed of ball 2,
(at rest)
After the collision,
Final speed of ball 2, 
Let
is the final speed of ball 1.
Initial momentum of the system is :



Final momentum of the system is :



According the law of conservation of linear momentum :
initial momentum = final momentum


So, the final velocity of ball 1 is (-2.616)m/s.