ANSWER PLS THIS WILL BRING MY GRADE REALLY HIGH UP Which of the following is not a compound

The question is in the picture

Sedbober [7]

Answer:

e) 120m/s

Explanation:

When the ball reaches its highest point, its velocity becomes zero, meaning

$v_0-gt = 0$ .

where $v_0$ is the initial velocity.

Solving for $t$ we get

$t = \dfrac{v_0}{g}$

which is the time it takes the ball to reach the highest point.

Now, after the ball has reached its highest point, it turns around and falls downwards. After time $t_0$ since it had reached the highest point, the ball has traveled downwards and the velocity $v_f$ it has gained is

$v_f = gt_0$ ,

and we are told that this is twice the initial velocity $v_0$ ; therefore,

$v_f = 2v_0 = gt_0$

which gives

$t_0 = \dfrac{2v_0}{g}.$

Thus, the total time taken to reach velocity $2v_0$ is

$t_{tot} = t+t_0 = \dfrac{v_0}{g}+\dfrac{2v_0}{g}$

$t_{tot} = \dfrac{3v_0}{g}.$

This $t_{tot}$ , we are told, is 36 seconds; therefore,

$36= \dfrac{3v_0}{g},$

and solving for $v_0$ we get:

$v_0 = \dfrac{36g}{3}$

$v_0 = \dfrac{36s(10m/s^2)}{3}$

$\boxed{v_0 = 120m/s}$

which from the options given is choice e.

7 0

3 years ago

A key issue in the post-Civil War era, the 14th Amendment guarantees which of the selections below under the laws for all citize

Semmy [17]

The correct answer is A: equal protection.

Further Explanation:

The fourteenth amendment was integral in granting equal rights to all citizens of the United States. This was not only for the citizens born in the country but naturalized citizens, former/freed slaves, and all children born to people not naturalized Americans.

The fourteenth amendment timeline is listed below;

06-08-1866 - By a vote of 33-11 the fourteenth amendment passed the Senate.
06-13-1866 - By a vote of 120-32 the fourteenth amendment passed the House of Representatives.
06-18-1866 - United States Statutes at Large, entered the amendment into text.
06-22-1866 - President Andrew Jackson announced that the the amendment was sent to be ratified by the states.
07-28-1868 - A proclamation stating the ratification was certified.

Learn more about the 14th amendment at brainly.com/question/885222

#LearnwithBrainly

3 0

2 years ago

Use appropriate units and significant figures. USE THE LAW OF COSINES AND LAW OF SINES.

N76 [4]

Answer:

The resultant velocity is 86.1 mi/h.

Explanation:

The law of cosines is given by:

$c^{2} = a^{2} + b^{2} - 2abcos(\theta)$

Where:

c: is the resultant velocity =?

a: is the velocity of the plane = 75.0 mi/h

b: is the velocity of the wind = 15.0 mi/h

θ: is the angle between "a" and "b"

The angle between "a" and "b" can be found as follows:

$\theta = 180.0 - 46.0 = 134.0 ^{\circ}$

Now, by using the law of cosines we have:

$c^{2} = (75.0)^{2} + (15.0)^{2} - 2*75.0*15.0*cos(134.0) = 7413.0$

$c = 86.1 mi/h$

Therefore, the resultant velocity is 86.1 mi/h.

The law of sines is:

$\frac{a}{sin(\gamma)} = \frac{b}{sin(\alpha)} = \frac{c}{sin(\theta)}$

Where:

γ: is the angle between "b" and "c"

α: is the angle between "a" and "c"

So, if we want to find "c" by using the law of sines, we need to know another angle besides θ (γ or α), and the statement does not give us.

I hope it helps you!

3 0

2 years ago

What kind of radiation is emitted in the following nuclear reaction

miv72 [106K]

Beta emission is occurring in the given nuclear reaction.

Answer: Option B

<u>Explanation:</u>

In this equation, the reactant is the Thorium atom, which is reduced to palladium. As the atomic number get decreased by one, so an electron will be emitted. This process of emission of electrons by radiation or decaying the reactant nuclei to form a new product nuclei is termed as beta emission.

So, the electrons are generally termed as beta particles while the positrons are termed as positive beta particles. So this is a kind of radioactive reactions where the reactant changes to new element by releasing an electron and thus there is a change in the atomic number of the product by one.

4 0

3 years ago

A flywheel of J = 50 kg-m2 initially standing still is subjected to a constant torque. If the angular velocity reaches 20 Hz in

Karolina [17]

Answer:

$\tau = 1256.5\ N.m$