What is the purpose of the CETI program?a. to listen for disturbances in the earth's crust
b. to listen for unlawful broadcasts from rogue nations
c. to listen for signals from outer space
d. to listen for sounds emitted from the ocean

Answers

Answer 1

Answer: The purpose of the CETI program is c. to listen for signals from outer space. CETI stands for "Communication with ExtraTerrestrial Intelligence", and is a program dedicated to the search for extraterrestrial beings and intelligence. It mainly listens to sounds emitted from outer space, and analyzes/deciphers them in case they are part of another civilization.

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What conditions are typcial of the soil the deeper we dig into it?

Answers

When we first dig into soil, it's nice and soft.( Depending on what soil it is; usually topsoil)

But when we go deeper into it, there are rocks and the soil is harder. There is bedrock at the bottom, subsoil in the middle, and topsoil at the top, which is where we walk.

A man travellers 10 km to the east 20 km to the north. Find distance moved displacement

Answers

$x^2=10^2+20^2\n x^2=100+400\n x^2=500\n x=√(500)=10\sqrt5 \approx22.36\hbox{ km}$

What is the difference between electric field and electrostatic field?

Answers

Semantically? An electric field does not have to be static while in electrostatics it's generally assumed that the electric field does not change or only changes so slowly that its rate of change doesn't matter. That's very different in electrodynamics where electric and magnetic field changes are always coupled.

The main difference is that Electrostatic field is because of a stationary charge. And Induced field is because of a changing magneticfield. Since magnetic field and electric field are the same thing in different frames of reference.

True or false : Scientific theories have withstood the test of time and are accepted as proven fact.

Answers

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What temperature is required to transfer waste heat to the environment for a heat engine to be 100% efficient?

Answers

It is not possible for a heat engine to be 100% efficient. The Laws of Thermodynamics explicitly explains that you can never transfer heat perfectly simply because during the flow of heat (either at low or high temperature) some of the initial input heat have been transformed into work.

If you had thrown the pennies down from the observation deck 321m above street level at an initial velocity of 1.99m/s, determine their speed as they reach the ground.

Answers

Answer: 79.3 m/s

Explanation: Use the equation V^2-Vo^2=2a(ΔY)

We know that the initial velocity is 1.99 m/s, so that is our Vo. We also are given that the height of the deck is 321, so therefore, our delta y is 321. Finally, our acceleration is 9.81 m/s^2 since that is the acceleration of gravity during free fall. We are solving for the final velocity (V)

So, our equation is V^2-(1.99^2)=2(9.8)(321)

Next, V^2-(3.96)=6291.6

V^2=6295.56

Take the square root of both sides, and V=79.3 m/s

Answer:79.3 m/s

Explanation:

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