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3 years ago

There are three naturally occurring isotopes

Physics

1 answer:

mote1985 [20]3 years ago

7 0

Explanation:

$^{41}\text{Hi}: 41.000\:\text{g/mol}×0.283 = 11.603\:\text{g/mol}$

$^{42}\text{Hi}: 42.000\:\text{g/mol}×0.429 = 18.018\:\text{g/mol}$

$^{44}\text{Hi}: 44.000\:\text{g/mol}×0.288 = 12.672\:\text{g/mol}$

Adding all the weighted values on the right hand side, we get

$\text{Hi}: 42.293\:\text{g/mol}$

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A person Drove from 8am Tuesday to 5pm Wednesday. Total drive 396 miles. He have lunch for 30 min on Tuesday and sleep overnight

r-ruslan [8.4K]

Answer:

average speed = 18 miles / hour

Explanation:

Given data

drive = 396 miles

time = 8 am Tuesday to 5 pm Wednesday = 33 hours

lunch = 30 min Tuesday + 30 min Wednesday = 60 min = 1 hour

sleep = 7 pm Tuesday to 5 am Wednesday = 10 hours

to find out

average speed

solution

we know that he take total time = 33 hours and he took rest + luch = ( 1 + 10 hours)

so total travel time is = 33 - 11 = 22 hours

average speed = distance / time

average speed = 396 / 22

average speed = 18 miles / hour

6 0

3 years ago

Will the net force be greater or lesser for objects with greater mass?

Archy [21]

The net force will be lesser for objects with greater mass

6 0

3 years ago

A body is thrown up with a velocity of 78.4 m per second.How high will it rise and how much time it will take to return to its p

a_sh-v [17]

Answer:

The maximum height reached by the body is 313.6 m

The time to return to its point of projection is 8 s.

Explanation:

Given;

initial velocity of the body, u = 78.4 m/s

at maximum height (h) the final velocity of the body (v) = 0

The following equation is applied to determine the maximum height reached by the body;

v² = u² - 2gh

0 = u² - 2gh

2gh = u²

h = u²/2g

h = (78.4²) / (2 x 9.8)

h = 313.6 m

The time to return to its point of projection is calculated as follows;

at maximum height, the final velocity becomes the initial velocity = 0

h = v + ¹/₂gt²

h = 0 + ¹/₂gt²

h = ¹/₂gt²

2h = gt²

t² = 2h/g

$t = \sqrt{\frac{2h}{g} } \\\\t = \sqrt{\frac{2\times 313.6}{9.8} }\\\\t = 8 \ s$

4 0

3 years ago

The components of vector A are:

dolphi86 [110]

Answer:

arctg (- 6.5 / 6.0) = -47.2906° ~ 47

Ans. 360° - 47°= 133°

6 0

3 years ago

Constructive interference of two coherent waves will occur if the path difference is:___.

Olegator [25]

Constructive interference of two coherent waves will occur if the path difference is λ/2.

<h3>Constructive interference:</h3>

When two waves are in phase and their maxima add, a process known as constructive interference occurs where the combined amplitude of the two waves equals the sum of their individual amplitudes.

The resultant wave is created by adding the amplitudes of two waves that are in phase and traveling in the same direction. The waves in this instance are said to have experienced beneficial interference. The upward displacement of the medium is higher than the displacement of the two interfering pulses because upward displacement occurs when the waves experience constructive interference. When the phase difference between the waves is an even multiple of (180°), constructive interference happens.

Learn more about constructive interference here:

brainly.com/question/17329186

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8 0

2 years ago