The object is no longer stationary when it is applied by push or pull.
<h3><u>Explanation: </u></h3>
The stationary position of an object means it is at one spot and remains there until an external stimulus is added.
To move an object from it's stationary position, an external stimulus, a push or a pull is applied to it. This push or pull is called Force. It is used for the following:
a) Moving an object
b) Bringing a moving object to a stop
c) Changing the shape of an object
The effect of force on a stationary object is determined on the basis of it's two types: Balanced forces and Unbalanced forces
Balanced forces would either keep a stationary object in the same state or a moving object continues to move in the same direction and same speed as it did earlier. These forces are applied on an object from opposite directions and in equal amount.Unbalanced forces are two forces applied on an object. The forces are unequal in amount. They cause a change in the speed and direction of a moving object.
Explanation:
there are 4 phases in which matter could be classified.
1. Solid: an example of this would be the metal copper.
2. Liquid: an example of this would be H2O or water.
3. Gas: an example of this would be oxygen gas or O2
4. Plasma: an example of this would be lightning.
hope this helps :)
Answer: Option B: They don't understand how redshifts affects stars.
There are millions and billions of stars in our universe. Scientists study stars using telescopes. But some stars are so far, that even the best powerful telescopes are not able to detect their light. Also, the interstellar distance is filled with clouds of dust and gas which makes some part of the universe opaque. It becomes difficult to study stars using earth based telescopes due to lot of light pollution. Astronomers understand how redshifts affects stars and hence, are able use this to study stars via their spectrum. Hence, astronomers don't understand how redshifts affects stars is a wrong reason of why they face difficulty in looking at distant stars.
Answer:
74.4 kilowatts or 99.8 horsepower
Explanation:
The explanation is in the attachment.