Ask question

Ask question

All categories

2 years ago

8

Which statement describes kinetic energy as the swing

2 answers:

shtirl [24]2 years ago

5 0

Answer:

The kinetic energy increases.

Explanation:

I just got it right

Lilit [14]2 years ago

4 0

Answer:

B

Explanation:

Just got it right

You might be interested in

Who is the first president of China ?

Kitty [74]

The President is Xi Jinping

6 0

3 years ago

Read 2 more answers

How can the atomic number of nitrogen be determined?

Doss [256]

Answer:

So... for the element of NITROGEN, you already know that the atomic number tells you the number of electrons. That means there are 7 electrons in a nitrogen atom. Looking at the picture, you can see there are two electrons in shell one and five in shell two.

4 0

2 years ago

Why shouldnt u cram for a skills test?

Angelina_Jolie [31]

Because your brain cant handle all of the information.

5 0

2 years ago

S the Sun. Points Wand

klasskru [66]

Answer:

the answer is points wand sun.

Explanation:

7 0

3 years ago

Read 2 more answers

The hydraulic oil in a car lift has a density of 8.30 102 kg/m³. The weight of the input piston is negligible. The radii of the

denpristay [2]

Answer:

(a) $F_i=68.58\ N$

(b) $F_i=69.903\ N$

Explanation:

Given:

density of hydraulic oil, $\rho=830\ kg.m^{-3}$

radius of input piston, $r_i=6.3\times 10^{-3}\ m$

radius of output plunger, $r_o=0.125\ m$

force to be supported, $F_o=27000\ N$

(a)

<u><em>Condition:</em></u><em>The bottom surfaces of piston and plunger at the same level.</em>

According to Pascal's law the pressure of a fluid is exerted equally in all directions against the walls of its container.

Mathematically:

$\frac{F_i}{A_i} =\frac{F_o}{A_o}$

putting respective values

$\frac{F_i}{\pi\times r_i^2} =\frac{27000}{\pi\times r_o^2}$

$\frac{F_i}{\pi\times (6.3\times 10^{-3})^2} =\frac{27000}{\pi\times 0.125^2}$

$F_i=68.58\ N$

(b)

<u><em>Condition:</em></u><em>The bottom surface of the output plunger is 1.30 m above that of the input piston.</em>

Given:

$h=1.3\ m$

Now,

$P_i=P_o+\rho.g.h$

$\frac{F_i}{\pi\times (6.3\times 10^{-3})^2} =\frac{27000}{\pi\times 0.125^2} +830\times 9.8\times 1.3$

$F_i=69.903\ N$

7 0

3 years ago