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4 years ago

Why do the group 1 elements tend to become +1 ions

Physics

1 answer:

Likurg_2 [28]4 years ago

7 0

because there small elemts like atoms but bigger than atoms we all know that

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If a star is found directly above the sun on the h-r diagram, what can you conclude about its size?.

hammer [34]

Answer:

It is larger than the Sun.

Explanation:

Brainliest pls

7 0

2 years ago

PLS HELP ! what are 3 examples of acceleration that doesn’t involve a change in speed ?

densk [106]

angular acceleration

tangential acceleration

radial acceleration

7 0

3 years ago

chapter 2 linear motion problems a student launches an arrow upward with an unknown initial velocity. the arrow takes 2.3 second

anzhelika [568]

Answer:

$V_{0}= 22.5\frac{m}{s}$ and Ymax=25.8m

Explanation:

Velocity at any time is given by $V=V_{0}sin\theta -gt$ . but when the arrow is on the top its velocity is zero and if it is launched upward the angle is 90°, so.

$0=V_{0} sin90-gt$

$V_{0}=gt=9.8\frac{m}{s^{2}}.2.3s=22.5\frac{m}{s}$

At the maximun height, position is given by $Ymax=V_{0}sin\theta.t-\frac{1}{2}gt^{2}$ , replacing $Ymax=22.5\frac{m}{s}x2.3s-\frac{1}{2}x9.8x(2.3)^{2}=25.8\frac{m}{s}$

5 0

3 years ago

Two water jets are emerging from a vessel at a height of 50 centimeters and 100 centimeters. If their horizontal velocities at t

scoundrel [369]

Answer: The correct answer is option (D).

Explanation:

Vertical distance of first water jet = $y_1=50 cm$

Vertical distance of second water jet = $y_2=100 cm$

Horizontal velocity of first water jet = $u_y_ 1=1 m/s$

Horizontal velocity of second water jet = $u_y_2=0.5 m/s$

Vertical distance of first water jet:

$y_1=(u_y_1)t_1+\frac{1}{2}gt_1^2$

$u_y_1=0,(u_y_1)t_1=0$

$t_1=\sqrt{\frac{2y_1}{g}}$ ...(1)

Similarly, Vertical distance of second water jet:

$y_2=(u_y_2)t_2+\frac{1}{2}gt_2^2$

$u_y_2=0,(u_y_2)t_2=0$

$t_2=\sqrt{\frac{2y_2}{g}}$ ...(2)

Horizontal distance of first water jet:

$x_1=(u_x_1)t_1+\frac{1}{2}at_1^2$

There is no acceleration in horizontal direction.

$a=0,at_1^2=0$

$x_1=(u_y_1)t_1$ ...(3)

Horizontal distance of second water jet:

$x_2=(u_x_2)t_2+\frac{1}{2}at_2^2$

$a=0,at_2^2=0$

$x_2=(u_x_2)t_2$ ...(4)

On dividing (3) and (4):

$\frac{x_1}{x_2}=\frac{(u_y_1)t_1}{(u_y_2)t_2}$

$\frac{x_1}{x_2}=\frac{u_y_1}{u_y_2}\times\frac{\sqrt{\frac{2y_1}{g}}}{\sqrt{\frac{2y_2}{g}}}}=\frac{u_y_1}{u_y_2}\sqrt{\frac{y_1}{y_2}}$

(from (1) and (2))

$\frac{x_1}{x_2}=\frac{1 m/s}{0.5 m/s}\sqrt{\frac{50 cm}{100 cm}}=1.41:1$

Hence, the correct answer is option (D).

6 0

4 years ago

In the fight of itachi and the anbu how did the string tighten on there neck

densk [106]

Danzo took Itachi's threat with utmost seriousness, after all, Itachi was Anbu ... massacre was done on his orders can instigate a civil war in the village. ... to Danzo and Itachi, one of the dead Anbu had a spiral seal under his neck skin. ... Itsuki let loose from the taut bowstring and the arrow vanished faster than he could blink

3 0

3 years ago