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3 years ago

What is the most likely reason that horses and mountain goats have hooves?

Physics

2 answers:

Nastasia [14]3 years ago

6 0

Answer:

They have homologous structures because they have a common ancestor.

Explanation:

Vikentia [17]3 years ago

3 0

Answer:

ITS THE FIRST CHOICE!!!!

Explanation:

I did this before :-)

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In the form of radioactive decay known as alpha decay, an unstable nucleus emits a helium-atom nucleus, which is called an alpha

trapecia [35]

Answer:

Velocity will be $v=4.06\times10^7m/sec$

Explanation:

We have given mass of alpha particle m = 4 u $=4\times 1.67\times 10^{-27}kg=6.68\times 10^{-27}kg$

Charge on alpha particle $q=2e=2\times 1.6\times 10^{-19}C=3.2\times 10^{-19}C$

Charge on thorium particle $=90\times 1.6\times 10^{-19}=144\times 10^{-19}C$

Diameter is given as d = 15 fm

So radius $r=\frac{d}{2}=\frac{15}{2}=7.5fm=7.5\times 10^{-15}m$

Potential energy is given by $E=\frac{1}{4\pi \epsilon _0}\frac{q_1q_2}{r}=\frac{Kq_1q_2}{r}=\frac{9\times 10^9\times 144\times 10^{-19}\times 3.2\times 10^{-19}}{7.5\times 10^{-15}}=5.529\times 10^{-12}J$

From energy conservation $\frac{1}{2}mv^2=5.529\times 10^{-12}$

$\frac{1}{2}\times 6.68\times 10^{-27}v^2=5.529\times 10^{-12}$

$v=4.06\times10^7m/sec$

6 0

3 years ago

You leave your house at 7:50

igor_vitrenko [27]

Answer:

LOL what?

Explanation:

3 0

3 years ago

Read 2 more answers

Which statement best explains why Earth’s outer core is in liquid form? The iron-nickel alloy melts due to hot temperatures. The

amm1812

Answer:

A. The iron-nickel alloy melts due to hot temperatures.

Explanation:

7 0

3 years ago

Read 2 more answers

Please Explain two ways nitrogen gas in the atmosphere is changed into nitrogen compounds that plants can use. -Thank you all in

KIM [24]

Not sure if this is what your looking for, but hope it helps. Nitrogen gas can be changed into nitrogen compound through nitrogen fixation, which is the conversion of nitrogen gas to ammonia, that are absorbed by the plant to make protein. Another way is through animals eating plants and obtaining nitrogen, which is later released, by decomposes, when the organism dies.

6 0

4 years ago

You are rolling on a skateboard with a constant velocity of 12 m/s. As you are moving you toss a baseball straight up into the a

Aliun [14]

Ick! Word problems! They suck. Okay so first of all you want to narrow it dow the equation.

Step 1. What are the numbers? (In this case 12 m/s and 25 m/s)

Step 2. Are you multiplying, dividing? (In this case your dividing)

Step 3. Divide.

I hope that helps.

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3 years ago