No. A substance floats or sinks in another substance because of
the densities of both of them.
If the density of the substance is more than the density of the other
one, it will sink. If less than the density of the other one, it will float.
Choice 'b' is one possible way to state
Newton's second law of motion.
The other choices are meaningless.
Answer:
1058.78 ft/sec
Explanation:
Horizontal Component of Velocity; This is the velocity of a body that act on the horizontal axis. I.e Velocity along x-axis
The horizontal velocity of a body can be calculated as shown below.\
Vh = Vcos∅.......................... Equation 1
Where Vh = horizontal component of the velocity, V = The velocity acting between the horizontal and the vertical axis, ∅ = Angle the velocity make with the horizontal.
Given: V = 1178 ft/sec, ∅ = 26°
Substitute into equation 1
Vh = 1178cos26
Vh = 1178(0.8988)
Vh = 1058.78 ft/sec
Hence the horizontal component of the velocity = 1058.78 ft/sec
Answer:
0.1667Hz
Explanation:
by explanation frequency is given by 1/time
after carrying out the calculation of time we can easily get frequency.
time=speed/distance
=18/3
=6s
but frequency=1/time
hence=1/6
=0.1667hertz
Tropospheric ozone is produced through interaction of heat and UV light, with nitrogen oxides and carbon containing compounds.
Option: D
Explanation:
In earth's atmosphere there are total five layers: Troposphere, Stratosphere, Mesosphere, Ionosphere and Exosphere. Stratosphere is known as Ozonosphere where ozone layer is present with the key constituent ozone. Ozone layer is very important as it protects whole environment from harmful UV rays coming from space.
Tropospheric ozone is produced through the interaction of heat and UV light with nitrogen oxides and carbon containing compounds. Ozone plays a dual role in environment when it is in lower surface area it is a harmful gas and when it is in atmospheric layer it is a life saving layer.
