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3 years ago

5

What instrument will we use to find liquid volume

1 answer:

Elanso [62]3 years ago

3 0

Answer:

Volumetric cylinders (would appreciate brainliest

Explanation:

Volumetric cylinders and volumetric flasks are used to measure volume of liquids contained in them. They are calibrated for volume included in them - this is indicated by the marking "IN". The liquid has accurate volume when it reaches the corresponding marking on the scale.

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How does the speed of light depend on an observer's frame of reference?

Irina-Kira [14]

The speed of light is the same in all frames of reference, regardless of the frame of reference or how it's moving.

5 0

3 years ago

A spiral spring of natural length 20.00cm has a scale

iVinArrow [24]

The mass of the scale pan : 0.11 kg

<h3>Further explanation</h3>

Given

A spiral spring's length = 20 cm

mass 50 g ⇒ the length = 22 cm

mass 70 g ⇒ the length = 22.25 cm

Required

the mass of the scale pan

Solution

Hooke's Law :

$\tt F=k.\Delta x$

The spring constant (k) :

$\tt k=\dfrac{\Delta F}{\Delta x}=\dfrac{g.(70-50)}{22.25-22}=\dfrac{g.20}{0.25}=g.80~g/cm=10~m/s^2\times 8~kg/m=80~N/m$

mass of the scale pan=m(for 50 g mass) :

$\tt (m+0.05).g=80\times (0.22-0.20)\\\\m=0.11~kg$

4 0

3 years ago

Which phase comes after waxing crescent moon

12345 [234]

Answer:

new moon

Explanation:

6 0

3 years ago

An enemy spaceship is moving toward your starfighter with a speed, as measured in your frame, of 0.400c. The enemy ship fires a

kvasek [131]

Answer:

0.859375c

31.03 seconds

Explanation:

v' = Velocity of my ship = 0.4 c

u = Velocity of rocket = 0.7 c

c = Speed of light = $3\times 10^8\ m/s$

s = Distance between my ship and enemy ship = $8\times 10^6\ km$

Relativistic addition of speed is given by

$v=\dfrac{v'+u}{1+\dfrac{uv'}{c^2}}\\\Rightarrow v=\dfrac{0.7+0.4}{1+\dfrac{0.7c\times 0.4c}{c^2}}\\\Rightarrow v=0.859375\ c$

The speed of the missile is 0.859375c

Time is given by

$t=\dfrac{s}{v}\\\Rightarrow t=\dfrac{8\times 10^9}{0.859375\times 3\times 10^8}\\\Rightarrow t=31.03\ s$

It will take 31.03 seconds to reach me.

6 0

3 years ago

A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising th

erik [133]

Answer:

$P = 36068.7 Watt$

Explanation:

As we know that average power is the ratio of total work done and total time interval

so we will have

$Power = \frac{Total \: Work}{time}$

now we know that

$Work = \frac{1}{2}mv^2 + mgh$

$W = \frac{1}{2}(700)(11^2) + 700(9.8)(9.6)$

so we will have

$W = 42350 J + 68856 J$

$W = 108206 J$

now power is given as

$P = \frac{108206}{3}$

$P = 36068.7 Watt$

6 0

3 years ago