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3 years ago

If an object of a constant mass experiences a constant net force, it will have a constant what?

Physics

1 answer:

Sladkaya [172]3 years ago

3 0

Explanation:

hope it helps !!!!!!!!!!!!!

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PLEASE HELP/// <br> how many Croatian Music Awards has 2cello won

Finger [1]

I think 3 but I’m not sure I don’t even know who they are

6 0

3 years ago

A spring gun fires a ball horizontally at 15 m/s. It is mounted on a flat car moving in a straight line at 25 m/s. relative to t

weeeeeb [17]

Answer:

15 m/s

Explanation:

The Speed Of The Car Does Not Add To The Speed Of The Bullet

6 0

3 years ago

An ancient club is found that contains 100 g of pure carbon and has an activity of 6.5 decays per second. Determine its age assu

never [62]

Answer:

The age of living tree is 11104 years.

Explanation:

Given that,

Mass of pure carbon = 100 g

Activity of this carbon is = 6.5 decays per second = 6.5 x60 decays/min =390 decays/m

We need to calculate the decay rate

$R=\dfrac{-dN}{dt}=\lambda N=\dfrac{0.693}{t_{\frac{1}{2}}}N$ ....(I)

Where, N = number of radio active atoms

$t_{\frac{1}{2}}$ =half life

We need to calculate the number of radio active atoms

For $N_{12_{c}}$

$N_{12_{c}}=\dfrac{N_{A}}{M}$

Where, $N_{A}$ =Avogadro number

$N_{12_{c}}=\dfrac{6.02\times10^{23}}{12}$

$N_{12_{c}}=5.02\times10^{22}\ nuclie/g$

For $N_{c_{14}}$

$N_{c_{14}}=1.30\times10^{-12}N_{12_{c}}$

$N_{c_{14}}=1.30\times10^{-12}\times5.02\times10^{22}$

$N_{c_{14}}=6.526\times10^{10}\ nuclei/g$

Put the value in the equation (I)

$R=\dfrac{0.693\times6.526\times10^{10}\times60}{5700\times3.16\times10^{7}}$

$R=15.0650\ decay/min g$

100 g carbon will decay with rate

$R=100\times15.0650=1507\ decay/min$

We need to calculate the total half lives

$(\dfrac{1}{2})^{n}=\dfrac{390}{1507}$

$2^n=\dfrac{1507}{390}$

$2^n=3.86$

$n ln 2=ln 3.86$

$n=\dfrac{ln 3.86}{ln 2}$

$n =1.948$

We need to calculate the age of living tree

Using formula of age

$t=n\times t_{\frac{1}{2}}$

$t=1.948\times5700$

$t=11103.6 =11104\ years$

Hence, The age of living tree is 11104 years.

5 0

4 years ago

What happens to the state of motion of the object, when you don't exert a force on it???

LenaWriter [7]

Answer: It eventually loses its stamina, and would come to a stop.

Explanation:

8 0

3 years ago

A student jumps straight up from a diving board that is 3.1 m above the water and hits the water 2.4 seconds later. With what ve

amm1812

Answer:

10. m/s

Explanation:

Given:

y₀ = 3.1 m

y = 0 m

a = -9.8 m/s²

t = 2.4 s

Find: v₀

y = y₀ + v₀ t + ½ at²

0 m = 3.1 m + v₀ (2.4 s) + ½ (-9.8 m/s²) (2.4 s)²

v₀ = 10.47 m/s

Rounded to two significant figures, the student's initial velocity was 10. m/s.

7 0

3 years ago