All categories

3 years ago

PLEASE HELP QUICKLY!!

Physics

2 answers:

Assoli18 [71]3 years ago

7 0

O a. How fast an object falls depends on its mass.

IS FALSE

Explanation:

Mass does not affect the speed of falling objects, assuming there is only gravity acting on it.

tensa zangetsu [6.8K]3 years ago

6 0

Answer:

Explanation:

took the test today at school, got a 95.

You might be interested in

Light of wavelength 500 nm falls normally on 50 slits that are 2.5×10−3mm wide and spaced 5.0×10−3mm apart. How many interferenc

yanalaym [24]

Answer:

Explanation:

The solution is in the attached files below

5 0

4 years ago

It’s estimated that there are a trillion comets in the Oort cloud, which extends out to about 50,000 AU.How much space does each

dexar [7]

Answer:

Each comet has 523 UA³
The typical spacing would be 8.05 UA
2.0181x10^21 Joules

Explanation:

Assuming comets are evenly distributed we can find first the volume of a sphere with the formula frac{{4}{3}}πr³ using 50000 as the radius, and then dividing this volume by the amount of comets. This gives a the space each comet has on average.
We apply the cube root as proposed in the question.
The kinectic energy is given <em>K=frac{{1}{2}}mv² where m is the mass and v is the velocity. Apropriate unit are given in the question.</em>

5 0

4 years ago

What causes changes of states in matter?

miv72 [106K]

Changes in state of matter would be a physical change to whatever it is that you are changing so I think it would be B.Molecules because in order for something to change the molecules have to be moving apart from one another but I maybe wrong depending on what it is your looking at

3 0

4 years ago

According to Care-stream's operating manual, what is the acceptable range of exposure indicators?

Aleks [24]

Answer:

correct option is C. 1700 - 2300

Explanation:

solution

according to Care stream, exposure indicators provide the technical adequancy incident radiations on the x ray

and we muse care stream formula that is

Exposure Index EI = 1000 × $log_{10} (mR)$ + 2000

here 1 mR = 2000 EI

and 2 mR = 2300 EI

and 3 mR = 1700 EI

so here acceptable range of exposure indicators is 1700 - 2300

correct option is C. 1700 - 2300

5 0

3 years ago

Despite their extensive applications in communication systems, radio waves a not the only form of EM waves present in our atmosp

tiny-mole [99]

Let us assume that the definition of frequency, wavelength and wave speed is determined by the function

$f = \frac{v}{\lambda}$

Here,

v = Velocity of wave

$\lambda$ = Wavelength

f = Frequency

We know that the earth has the ability to absorb visible light but that it can also emit a longer radiation wavelength. This assessment allows us to confirm that option A. Is correct. In turn, if said wavelength is large, being inversely proportional to the frequency,

$\lambda \propto \frac{1}{f}$

This does tend to be lower radiation. The correct options are:

A.The earth absorbs visible light and emits radiation with a longer wavelength.

B.The earth absorbs visible light and emits radiation with a lower frequency.

3 0

4 years ago