Answer:
2. -I'm hungry.-<u> eat</u> your sandwich, then.
3. You're in a hospital.<u> Don't talk</u> loudly.
4.-I think that I'm lost.- <u>Ask</u> for directions, then.
5. Jacob can't solve this problem. <u>Help </u>him, please!
6.It's hot today. <u>Don't take</u> your jacket with you, Lucy.
7.<u>Look</u> at this picture, kids. What can you see?
8. <u>Don't throw </u>rubbish on the street, Pete. We must protect our environment.
Explanation:
We use the imperative form to give orders, instructions, or to warn someone about something. To write sentences in the imperative form, we have to write the verb in the infinitive, and if it is a negative command, we have to write the do not or don't and the verb in the infinitive.
For example, if we want to give an instruction, we can say -Turn on the right- the verb is in the infinite form, the subject may or may not be present since the person can deduce to whom we are saying the command. An example of a sentence where we use the negative form can be - Don't run in the hallways- In this case, we use the auxiliary verb do and the auxiliary not followed by the verb.
They have changed the world by creating interesting things that amaze us and let’s us do the right things
The narrator is confused or uncertain about how much time has elapsed
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From Keplers discovery, scientists were also able to infer that the closer a satellite is to an object, the stronger the force of attraction, hence it must travel faster in order to maintain orbit. Relying on this formula, we are able to see that the velocity required for orbit is equal to the square root of the distance from the object to the center of the Earth times the acceleration due to gravity at that distance. So if we wanted to put a satellite in a circular orbit at 500 km above the surface (what scientists would call a Low Earth Orbit LEO), it would need a speed of ((6.67 x 10-11 * 6.0 x 1024)/(6900000))1/2 or 7615.77 m/s. So really, a satellites ability to maintain its orbit comes down to a balance between two factors: its velocity (or the speed at which it would travel in a straight line), and the gravitational pull between the satellite and the planet it orbits. If youd like more info on satellites, check out these articles: Orbital Objects List of satellites in geostationary orbit Weve also recorded an episode of Astronomy Cast about the space shuttle.
