SAT HIGH SCHOOL

At which temperature would atoms of a he(g) sample have the greatest average kinetic energy?.

Answers

Answer 1
Answer:

Answer:

At 37 degrees celsius, atoms of a He (g) sample would have the greatest average Kinetic energy.

Explanation:

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Which element is the basis for all living things and can combine with other elements in many ways? phosphorus carbon oxygen sulfur

Answers

The answer is carbon

Answer:

b

Explanation:

A helicopter hovers 200. 0 meters over the ground and releases a relief packet. How much time does it take for the food packet to reach the ground?

Answers

This solution assumes that there are no air resistance and no wind and thus no drag to the object itself

Based on the information given:

  • inital height = 200
  • final height = 0 or groundlevel
  • no intial velocity
  • acceleration: -g or 9.8m/s^2  (gravitional acceleration)

With that information at hand, we use the physics equation:

      x = x_(intial-height) +v_(intial-velocity)+(1)/(2)at^2

  • a: acceleration
  • t: time taken for the fall
  • x: (with no subscript) is the final height

Now let's plug in all the known variables and solve.

     .0 = 200-(1)/(2)*9.8t^2\n (1)/(2)*9.8t^2 = 200\n4.9t^2 = 200\nt = 6.389s

Thus it takes the food packet approximately 6.389 seconds to hit the ground.

Hope that helps!

In extreme heat, __________ can dangerously strain your engine.A. refueling too often

B. hills

C. using the heater

Answers

Answer: refueling too often

Explanation:

the answer for this problem is A

A fish tank in a pet store was less than half full ofwater when a worker turned on a hose to fill the
tank at a constant rate. After the hose was on for
5 minutes, the tank was exactly half full. After
the hose was on for 30 minutes, the tank was
three-quarters full. How many minutes did it take
after the hose was turned on for the tank to be
completely filled with water?

Answers

100 minutes

During 25 minutes, it got filled 1/4 more (3/4 - 1/2)

So it would take 100 minutes to completely fill it

Which addition expression has the sum 8 – 3i ? (9 2i) (1 – i) (9 4i) (–1 – 7i) (7 2i) (1 – i) (7 4i) (–1 – 7i)

Answers

Considering the definition and sum of complex numbers, the sum (9 + 4i) + (–1 - 7i) gives as a result 8 -3i.

Complex numbers are combinations of real numbers and imaginary numbers.

In other words, complex numbers are numbers that have a real part and an imaginary part.

The most common representation of a complex number is the sum of a real part and an imaginary part. At the same time, the imaginary part is divided between the imaginary part and the imaginary unit:

z = a + bi

where

  • a is a real number.
  • b is the imaginary part.
  • i is the imaginary unit.

This expression is called the binomial form of the complex number z.

To add two or more complex numbers, you simply have to add the real and imaginary parts separately. That is, being z1 = a + bi and z2 = c + di, the sum of both complex numbers is calculated as:

z1 + z2 = (a + c) + (b + d) i

In this case, to obtain 8 -3i you have to sum:

(9 + 4i) + (–1 – 7i)= (9-1) + (4-7)i= 8 - 3i

So, the sum (9 + 4i) + (–1 - 7i) gives as a result 8 -3i.

Learn more about complex number:

Answer:

B- (9 + 4i) + (–1 – 7i)

Explanation:

:)

Lava that cools quickly forms ____ rocks.a.
extrusive metamorphic
c.
intrusive metamorphic
b.
extrusive igneous
d.
intrusive igneous

Answers

Lava that cools quickly forms B) Extrusive igneous rocks
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