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4 years ago

As the wavelength decreases, the frequency

1 answer:

3 0

<span>As the wavelength decreases, the frequency </span><span>increases and energy increases.

So, option C is your answer.

Hope this helps!</span>

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Two wheels have the same mass and radius of 4.4 kg and 0.48 m, respectively. One has (a) the shape of a hoop and the other (b) t

abruzzese [7]

Answer:

1) $\sum T_{externalhoop}=0.4418Nm$

2) $\sum T_{externaldisc}=0.2209Nm$

Explanation:

Using the second equation of angular motion we have

$\theta =\omega _{o}t+\frac{1}{2}\alpha t^{2}$

Since the wheels start from rest we ahve $omega _{o}=0$

Applying the given values in the equation we have

$14=\frac{1}{2}\alpha \times 8^{2}\\\\\therefore \alpha =\frac{28}{64}=0.4375rad/s^{2}$

Now by newton's second law of motion in angular motion we have

$\sum T_{external}=I\alpha$

1) For Hoop We have

$I_{hoop}=Mr^{2}\\\\\therefore I_{hoop}=4.4\times(0.48)^{2}=1.01376kgm^{2}$

Thus

$\sum T_{external}=1.01376\times 0.4375$

$\sum T_{external}=0.4418Nm$

2)For disc We have

$I_{disc}=\frac{Mr^{2}}{2}\\\\\therefore I_{hoop}=2.2\times(0.48)^{2}=0.506kgm^{2}$

Thus

$\sum T_{external}=0.506\times 0.4375$

$\sum T_{external}=0.2209Nm$

5 0

4 years ago

Use the drop-down menus to identify the types of properties described. Kerosene was commonly used in lamps because it burns easi

Norma-Jean [14]

Chemical Property

Physical Property

Chemical Property

Physical Property

3 0

3 years ago

Read 2 more answers

A student wants to demonstrate entropy using the songs on her portable music player. What should she do to demonstrate the lowes

igomit [66]

your answer is C.Play all the songs in alphabetical order.
hope that helps !!!

8 0

4 years ago

In the steps of the scientific method, what is the next step after formulating and objectively testing hypotheses?

Dmitriy789 [7]

Answer:

Option A

interpreting results

Explanation:

In a Scientific research, we first formulate and test hypothesis of the study. A hypothesis is a tentative guess in the study which should be validated in the process of the study. We may have a null and alternative hypothesis. After formulating the study, we conduct the actual study where we get raw data. The raw data is then analyzed, in many cases using statistical analysis tools such as R, python, excel spreadsheet etc. Therefore, the next step after formulating and objectively testing hypotheses is to interpret the results.

3 0

3 years ago

A 2.0 kg block is given an initial speed of 8.0 m/s up an incline plane of angle 30° where the coefficient of friction is 0.35.

Korvikt [17]

Answer:

4.1 m

Explanation:

Given :

Mass of the block = m = 2 kg.

Initial velocity = $v_{i}$ = 8 m/s

Angle of the incline = α = 30°

Coefficient of friction = μ = 0.35

Distance moved up the incline is calculated using the work energy theorem.

Work done by the net force = change in kinetic energy of the object.

Net work = work done by friction + work done by the gravity component.

(- mg sin 30 - μ mg cos 30 ) d = $1/2m v_{f}^{2} - 1/2 m v_{i}^{2}$

m cancels out when divided on both sides with m.

- [(9.8 sin 30 - ( 0.35 × 9.8 × cos 30) ] d = 1/2 ( 0² - 8² )

⇒ -7.87 d = -32

⇒ Distance traveled up the incline = d = 4.0658 m = 4.1 m

8 0

4 years ago