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4 years ago

Atomic nuclei of almost all elements consist of

Physics

1 answer:

wolverine [178]4 years ago

4 0

<h2>Answer: protons and neutrons. </h2>

The atomic nuclei of almost all elements consist of protons and neutrons.

The nucleus of an atom has very small dimensions. However, it <u>occupies its central part and concentrates more than 99% of its total mass. </u>

It is in the nucleus that the protons (positive charge) and neutrons (neutral charge) are found.

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You have landed a summer job as the technical assistant to the director of an adventure movie shot here in Arizona. The script c

kati45 [8]

Answer:

$t = 3.798 \ s$

$S = 67.91 \ m$

Explanation:

From the question we are told that

The height of the helicopter is $h= 235 ft$

The height of the bed of the truck is $h_b = 3 \ ft$

The speed of the truck is $v = 40 \ miles / hour = \frac{40 * 1609.34}{3600} = 17.88 \ m/s$

Generally the distance between the truck bed and the helicopter is mathematically represented as

$H = h - h_b$

=> $H = 235 -3$

=> $H = 232 \ ft$

Converting to meters

$H = \frac{ 232}{3.281} = 70.7 \ m$

Generally the time at which the helicopter should drop the package is mathematically represented as

$t = \sqrt{\frac{2 * H}{g} }$

$t = \sqrt{\frac{2 * 70.7}{9.8} }$

$t = 3.798 \ s$

Generally distance of the helicopter from the drop site at time t = 0 s is

$S = v * t$

=> $S = 17.88 * 3.798$

=> $S = 67.91 \ m$

8 0

4 years ago

The dimensions of information systems are people, organizations, and information technology.

Alchen [17]

Answer:

false

Explanation:

5 0

3 years ago

19 of 35

SpyIntel [72]

Answer:

C. 6km

Explanation:

Dolphin is travelling with an average velocity of 3 kmph. So 1 h = 3km

And 2 h = 3×2 = 6km.

6 0

2 years ago

How does an executive order differ from a statue?

ICE Princess25 [194]

Answer: Executive Order on Protecting American Monuments, Memorials, and Statues against our country are public monuments, memorials, and statues.

Explanation: learned it last week

6 0

3 years ago

Blood is accelerated from rest to 30.0 cm/s in a distance of 1.80 cm by the left ventricle of the heart. (a) Make a sketch of th

Mila [183]

Answer:

a. Picture attached

b. V, X

c. $t=0.12 s$

d. It makes sense cosidering that a normal heart beat rate is between 60 and 100 beats per minute (bpm).

Explanation:

First we have to identify the unknown of this problem:

$a: acceleration\\t: time$

Considering the characteristics of the problem and that distance and velocity are specified, the acceleration is constant, for that reason we use the equations of uniformly accelerated motion as follows:

$v=v_{0}+at\\ x=x_{0}+ v_{0}+\frac{1}{2}at^{2}$

If we reorganize the equations, considering that $x_{0}$ and $v_{0}$ are zero because motion starts from rest , we have:

$a=\frac{v}{t} \\x=\frac{1}{2}at^{2} =\frac{1}{2}\frac{v}{t} t^{2}=\frac{1}{2} vt\\t=\frac{2x}{v} \\t=\frac{2*1.80cm}{30.0\frac{cm}{s} } \\t=0.12 s$

Finally, the analysis of the result leaves us to understand why the normal heart beat rate varies between 60 and 100 bpm.

6 0

3 years ago