Answer:
initially- with positive potential differences - the current is directly proportional to the p.d. However, as the current through the filament increases, the heating effect caused in the lamp also increases and so the temperature of the filament rises. This increase in the filament's temperature also increases the resistance of the filament. As a result the rate of increase of the current decreases and a greater change in the potential difference is required to cause a change in the current. This can be seen on the curve as the gradient becomes more shallow (greater resistance). This same pattern is repeated when a negative potential difference is applied across the filament
Answer:
if increase the pressure in a system the acceleration should increase
Explanation:
The definition of pressure is
P = F / A
Where F is the force and A the area
F = P A
Let's write Newton's second law
F = ma
We substitute
P A = m a
So we see that the pressure is directly proportional to the acceleration, if increase the pressure in a system the acceleration should increase
To find the volume, multiply them all together: (height x width x length)
18 x 19 x 20 = 6840cm³
A .Earthquakes
Explaination
Answer:
t = 0.2845Nm (rounded to 4 decimal places)
Explanation:
The disk rotates at a distance of an arc length of 28cm
Arc length = radius × central angle × π/180
28cm = 10cm × central angle × π/180
Central angle = 
× 180/π ≈ 160.4°
Torque (t) = rFsin(central angle) , where F is the applied force
Radius in meters = 10/100 = 0.1m
t = 0.1m × 16N × sin160.4°
t = 0.2845Nm (rounded to 4 decimal places)
