Which of the following is an example of pure research? Creating new elements to study their properties Producing plastics that are heat-resistant to use in ovensDetermining how to reduce rusting on metal ships and cargo carriersFinding alternatives to gasoline to fuel transportation vehicles

Answers

Answer 1

Answer: Creating new elements in order to study their properties is definitely pure research.
It has no earthly [known] application, since the elements don't even exist, whereas
for each of the other choices, you've stated the desired application as the reason
for the search.

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Which of these is most likely to lead directly to a black market?a. a supply shock
c. rationing
b. a price floor
d. equilibrium

Answers

The answer is C.rationing.

♡♡Hope I helped!!! :)♡♡

Answer:

c. rationing

Explanation:

allow each person to have only a fixed amount of (a particular commodity).

Suppose you wanted to do an experiment to find out if changing the length of a pendulum changed the amount of time it takes the pendulum to swing back and forth. Which pendulums from the above diagram would you use for the experiment?a.1 and 4
b.2 and 4
c.1 and 3
d.2 and 5
e.all

Answers

If you started out knowing nothing about pendulums, then you'd
want to use #1 and #3 for an experiment with meaningful results.

Why ?

Thinking clearly, you'd look at a swinging pendulum, and realize that
there are only two things about it that might affect its period:
==> its length, and ==> the weight on the end of it.

Since this first experiment focuses on the length, you want to keep
everything else constant. So you'd want to compare pendulums
with different lengths but the same weight.

Later on, you'll do the other experiment. You'll compare pendulums
with the same length but different weights.

Hi!

Assuming that W = weight.
Weight has to be equal so that you can concentrate on time change because of varying length.

If you change weight as well, the experiment would not be very accurate and would result in a failure.

So, the right answer is C. 1 and 3.

Hope this helped!

Which device is using a motor?A water heater creates heat energy from electric energy.

A waterfall rotates a waterwheel to turn an axle.

A body massager uses electric energy to move back and forth.

A solar charger creates electric energy from the Sun.

Answers

Out of all the options, only body massager which uses electric energy to move back and forth is using motor here. It is because a motor converts electrical energy to Mechanical energy and only massager obeys it among all the options.

In short, Your Answer would be Option C

Hope this helps!

Answer: C.

A body massager uses electric energy to move back and forth.

Explanation:

Explain how changes in weather are caused by the interaction of air masses

Answers

When the lower air pressure gets colds it turns to be cold weather turns in to the high pressure like wise it would be changing of high pressure gets change in to the low pressure of it.So that there will be huge storm has been occurred and it will cause a rain.

What things can increase the rate of evaporation

Answers

Heat, gravitational pull, amount of gas and what type of gas in the air.

1:Temperature 2:Surface area 3:reduces density of surrounding water vapour in the air Hope this Helps!! :)

According to this equation, F=ma, how much force is needed to accelerate a 70-kg runner at 5m/s2?A.
350 m/s

B.
14 N

C.
350 N

D.
14 m/s

Answers

F=ma = 70*5 = 350N, therefore, 350N is needed to accelerate a 70-kg runner at 5m/s2.

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Which of the following best describes the fate of energy in ecosystems?

What is the specific heat of an unknown substance if 2000 J of energy are required to raise the temperature of 4 grams of the substance 5 degrees Celsius?