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3 years ago

15

A spectrophotometer measures the transmittance or the absorbance. True or False

1 answer:

kicyunya [14]3 years ago

5 0

Answer: FALSE

Explanation: Could you help me with a question?

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Compare and contrast the three <br> classes of levers.

Xelga [282]

<em>Class I .</em> . .
The fulcrum is between the effort and the load.
The mechanical advantage may be any positive number, more or less than ' 1 '.

<em>Class II .</em> . .
The load is between the fulcrum and the effort.
The mechanical advantage is always greater than ' 1 '.

<em>Class III .</em> . .
The effort is between the fulcrum and the load.
The mechanical advantage is always less than ' 1 '.

7 0

3 years ago

A girl moves quickly to the center of a spinning merry-go-round, traveling along the radius of the merry-go-round. Which of the

DochEvi [55]

Answer:

The angular speed of the system increases.

The moment of inertia of the system decreases.

Explanation:

As we know that the girl is going towards the center of the circle so here the moment of inertia of the girl is given as

$I = mr^2$

here we know that

r = position of the girl from the center of the disc

now we know that the girl is moving towards the center so its distance will continuously decreasing

So the moment of inertia of the girl will decrease

Now we know that that with respect to the center of the disc there is no torque on the disc + girl system

So here we can use angular momentum conservation

So we have

$I\omega = constant$

since moment of inertia is decreasing for the system

so angular speed will increase

3 0

4 years ago

aev [14]

Answer:

c

Explanation:

6 0

3 years ago

Read 2 more answers

Car travels 40km/hr for half an hour. How far does it travel

Lerok [7]

Answer:

The car traveled, d = 20 Km

Explanation:

Given that,

The speed of the car, v = 40 Km/h

The time taken by the car is, t = 0.5 h

The distance covered by the car for half an hour, d = ?

The relation between the velocity and displacement is given by the formula,

<em> v = d / t</em>

Therefore,

d = v x t

Substituting the given values in the above equation,

d = 40 Km/h x 0.5 h

= 20 Km

Hence, the distance covered by the car is, d = 10 Km

7 0

3 years ago

A sound wave traveling through dry air has a frequency of 16 Hz, a wavelength of 22 m, and a speed of 350 m/s. When the sound wa

nataly862011 [7]

Answer:

D. 256 m/s

Explanation:

$f$ = Frequency of the wave = $16\ \text{Hz}$

$\lambda$ = Wavelength = $16\ \text{m}$

Speed of a wave is given by

$v=f\lambda$

$\Rightarrow v=16\times 16$

$\Rightarrow v=256\ \text{m/s}$

The speed of the wave as it passes through the cloud of nitrous oxide is $256\ \text{m/s}$ .

5 0

3 years ago

Read 2 more answers