Answer:
True
Explanation: Air resistance (also called drag) is a type of frictional force. Like all frictional forces, the force of air resistance always opposes the motion of an object. Usually, the air resistance force is not very strong.
You can check if something is magnetic by watching if it's attracted/repelled by a magnet.
That's the same as saying that the fact that something is magnetic can be determined by watching its behavior.
Elements are arranged in groups by similay atomic structure on the periodic table. This allows for an element's properties to be predicted based on general periodic trends. Che of these trends, atomic radius, increases down a group and to the left along a period and can be defined as energy required to remove valence electron.
<u>Explanation:</u>
It is known that elements are grouped based on their chemical reactivity in groups of periodic tables. Along with similar chemical properties , they elements placed in a group also have similar atomic structure but they differ by their atomic radius.
So it is found that the atomic radius get increased down the group also along the left side in a period of the periodic table. Due to this atomic radius we can evaluate the energy needed to remove valence electron. As larger the element's atomic radius the lesser energy is required to remove the valence electrons from that element.
Answer:
45.83MPH
Explanation:
Let's use equivalent ratio.
275 miles = 6 hours
6 / 6
45.83 miles = 1 hour
Answer:
171.5Hz,514.5Hz and 857.5Hz
Explanation:
We are given that
Distance between two loudspeaker,d=2.65 m
Distance of listener from one end=19.1 m
Distance of listener from other end=20.1 m
m
Speed of sound,v=343m/s
For destructive interference
Using the formula and substitute n=1
For n=2
For n=3
Hence, the three lowest frequencies that give minimum signal (destructive interference) at the listener's location is given by
171.5Hz,514.5Hz and 857.5Hz
