Answer:
rotation and revolution
Explanation:
out of the four motions the earth is subject to which are: rotation about its axis, revolution around the Sun, processional motion (a slow conical movement
) of the axis, and the solar motion (this refers to the
movement of the whole solar system with space), only two are of any
importance to meteorology as this two causes changes in weather and seasons. The first motion is rotation. Earth rotates on its axis
once every 24 hours. One-half of the Earth’s surface is
therefore facing the Sun at all times. The second motion of Earth is its revolution around the Sun. The revolution around the Sun and the earth tilt on its axis are responsible for changes in seasons. The Earth
makes one complete revolution around the Sun in
approximately 365 1/4 days.
Answer:
10.028%
Explanation:
= Angle between polarizer
The polarized light after passing through first polarizer
The polarized light after passing through second polarizer
The polarized light after passing through third polarizer
The percent of the light gets through this combination of filters is 10.028%
Answer:
en español por
favor para entender un poco más
Answer:
(B) 0.5 g
Explanation:
Newton's second law says ∑ F i = m a .
the rate of change in momentum of a body is proportional to the force applied on the body.
f∝ma
f=kma
were k is constant and equal to 1
The centripetal acceleration is an acceleration.
the tension on the swing and object weight goes to the left hand side while the centripetal acceleration goes to the right handside
At the bottom of the swing, ΣF = FT – mg = mac;
notice that the tension in the swing is 1.5 times the weight of the object
we can write
1.5mg – mg = mac,
0.5mg = mac
0.5 g=ac
The most important characteristics that are exhibited by metals are-
1- Metals are ductile
2-Most metals are conductive in nature.
3-Most metals are malleable.
4- Metals have strong inter molecular force of attraction between the.
5-Metals have luster.
6-Metals are sonorous.
Here we are given Tungsten filament.
Tungsten is a metal.So it must be conductive and as well as ductile in nature.
The electric filament that we are using in our electric bulb glows due to the heating effect of current.Hence the chosen substances for glowing electric bulb must have high melting point.
The melting point of tungsten is 1650 degree celsius which is very high.That's why it is used in electric bulb.
Hence the correct answer to the question is the third one i.e Tungsten is ductile,has a high melting point, and is electrically conductive.
