Ask question

Ask question

All categories

3 years ago

11

PLEASE HELP WILL GIVE BRAINLIEST Scientists today learn about the world by _____. 1. using untested hypotheses to revise theorie

s 2. observing, measuring, testing, and explaining their ideas 3. formulating conclusions without testing them 4. changing scientific laws

1 answer:

hodyreva [135]3 years ago

6 0

Answer:

obseverving, measuring, testing, and explaining their ideas

You might be interested in

The Environmental Protection Agency has ben concerned about the levels of radon gas in homes. If a sample of gas taken from a ba

soldier1979 [14.2K]

Answer is 2.19 g of radon will remain in the sample after 4 half-lives

6 0

3 years ago

PLEASE HELP MEEEE <br>marking brainliest

aniked [119]

Answer:

Option C

Explanation:

Centripetal acceleration formula regarding velocity and radius is,

$a_c=\frac{v^2}{r}$

now we know the centripetal acceleration is 9 and the radius is 16 so we plug these values into our formula,

$a_c=\frac{v^2}{r}\\\\9=\frac{v^2}{16} \\\\144=v^2\\\\\sqrt{144}=v \\\\v=12\ m/s$

so velocity is 12 m/s

Now for the angular velocity, the formula of centripetal acceleration regarding angular velocity and radius is,

$a_c=rw^2$

we know the centripetal acceleration is 9 and the radius is 16 so plug these values into the formula,

$a_c=rw^2\\\\9=16w^2\\\\0.5625=w^2\\\\\sqrt{0.5625}=w \\\\0.75\ rad/s=w\\$

so angular velocity is 0.75 rad/s

8 0

3 years ago

lf an object's velocity changes from 25 meters per second to 15 meters per second in 2.0 seconds, the magnitude of the object's

Mila [183]

Answer:

-5 m/s^2

Explanation:

$acceleration = \frac{change \: in \: velocity}{time} \\ \\ = \frac{15 - 25}{2} \\ \\ = \frac{ - 10}{2} \\ \\ = - 5 \: m {s}^{ - 2} \\ \\ negative \: sign \: represents \: that \: \\ object \: is \: slowing \: down.$

6 0

3 years ago

Read 2 more answers

What is true of an object pulled inward in an electric field?

slava [35]

Answer:

option b

Explanation:

There is an object pulled inward in an electric field.

We have to find out of the four options given which is true.

a) The object has a neutral charge is false since when electric field pulls the object inward, there is a charge inside.

b) The object has a charge opposite that of the field, this option is correct since there will be an equal and opposite charge created by the object

c) The object has a negative charge will be correct only if the original charge was positive hence wrong

d) The object has a charge the same as that of the field is incorrect since this would be opposite the charge

So only option b is right

5 0

4 years ago

When considering special needs acceptance guidelines, which of the following is NOT included

Art [367]

What are the answer options? It says which of the following. :)

6 0

3 years ago

Read 2 more answers