Answer:
Campfires top the list of ways that humans start wildfires, the U.S. Forest Service said. Typically, campfires either grow out of control and the people who built the fire do not have a way to stop it, or they fail to extinguish the fire properly, allowing the fire to re-ignite after they leave.
Explanation:
Answer:
The time period of the motion is, T = 0.03 s
The frequency of the rotation is, f = 30 Hz
Explanation:
Given data,
The rotational speed of an object, ω = 30 rpm
ω = 188.5 rad/s
The time period of motion is,
T = 2π / ω
Substituting the given values in the above equation
= 2π / 188.5
T = 0.03 s
The time period of the motion is, T = 0.03 s
The frequency of rotation,
f = 1 /T
= 1 / 0.03
= 30 Hz
Hence, the frequency of the rotation is, f = 30 Hz
Answer:
Explanation:
a ) gauge pressure will be due to water column of length 15 cm .
pressure = h d g , h is height of column , d is density of column and g is gravitational acceleration .
= .15 x 10³ x 9.8
= 1470 Pa .
b )
Let due of weight of water column , mercury level in left column goes down by distance h . The level of mercury in right column will rise by the same distance ie by distance h .
So mercury column of 2h height is balancing the water column of height 15 cm
2h x 13.6 x 10³ x g = .15 x 10³ x g
h = .15 / (2 x 13.6)
= .55 x 10⁻² m
= . 55 cm
Difference of height of water column and mercury column
= 15 - 2 x .55 cm
= 13.9 cm .
Acceleration is an increased rate of speed or movement. So If an object has a low acceleration time it would not be moving very fast. So your question proves to be true.
