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3 years ago

To describe an objects motion,you need to know both it's speed and its

Physics

1 answer:

Sergeeva-Olga [200]3 years ago

8 0

Velocity is your answer

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HELPPP PLEASEEEEE, BRIANLEST WILL BE GIVEN ON CORRECT!

horsena [70]

work done =force /area

=500/50

power =work done * time taken

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4 years ago

HEY CAN ANYONE ANSA DIS!!!!

Nataly [62]

Answer: 7.25 * 10^5

Explanation:

1. The equation simplifies to (7*10 + 2.5) 10000.

2. Simplify in the parenthesis. 72.5 * 10000.

3. In scientific notation, the answer is 7.25* 10^5.

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4 years ago

Which element could provide one atom to make an ionic bond with nitrogen?

aev [14]

Answer:

boron

aluminum

gallium

indium

thallium

Explanation:

Any of these could work. Nitrogen has 5 valence electrons so you just needed to pick an element that has 3 valence electrons that nitrogen could borrow. This periodic table shows valence electron counts:

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3 years ago

cylindrical water tank is 20.0 m tall, open to the atmosphere at the top, and is filled to the top. It is noticed that a small h

Naya [18.7K]

Answer:

The velocity is $v =17.98 \ m/s$

The diameter is $d = 0.00184m$

Explanation:

The diagram of the set up is shown on the first uploaded image

From the question we are told that

The height of the water tank is $h = 20.0 \ m$

The position of the hole $p_h = 16.5m$ below water level

The rate of water flow $\r V = 2.90 *10^{-3} m^3 /min = \frac{2.90 *10^{-3}}{60} = 0.048*10^{-3} m^3/s$

According to Bernoulli's theorem position of the hole

$\frac{P_o + h \rho g}{\rho} + \frac{1}{2} u^2 = \frac{P_o}{\rho } + \frac{1}{2} v^2$

Where u is the initial speed the water through the hole = 0 m/s

$P_o$ is the atmospheric pressure

$\frac{P_o }{\rho} + \frac{ h \rho g}{\rho} + 0 = \frac{P_o}{\rho } + \frac{1}{2} v^2$

$v = \sqrt{2gh}$

Substituting value

$v = \sqrt{2 * 9.8 * 16.5 }$

$v =17.98 \ m/s$

The Volumetric flow rate is mathematically represented as

$\r V = A * v$

Making A the subject

$A = \frac{\r V}{v}$

substituting value

$A = \frac{0.048 *10^{-3}}{17.98}$

$= 2.66*10^{-6}m^2$

Area is mathematically represented as

$A = \frac{\pi d^2}{4}$

making d the subject

$d = \sqrt{\frac{4*A}{\pi} }$

Substituting values

$d = \sqrt{\frac{4 * 2.67 *10^{-6}}{3.142} }$

$d = 0.00184m$

6 0

3 years ago

A tortoise is walking in the desert. It walks<br> 6.4 meters in<br> 4 minutes. What is its speed?

labwork [276]

Speed = (distance covered) / (time to cover the distance)

= (6.4 meters) / (4 minutes)

= (6.4/4) (meter/minute) = 1.6 meter per minute .

3 0

3 years ago