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3 years ago

13

A sound has a higher pitch than a bell. Which quantity must also be higher in this sound than in the bell?

1 answer:

Talja [164]3 years ago

6 0

Answer:

frequency

Explanation:

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A 25.0 kg bag of peat moss sits in the back of a flatbed truck, driving up a hill. The bag experiences a 225N normal force. The

malfutka [58]

Answer:

a

$\theta = 23.32^o$

b

$\mu_s = 0.27$

c

$s = 0.948 \ m$

Explanation:

From the question we are told that

The mass of the bag is $m_b = 25.0 \ kg$

The normal force experienced is $F_n = 225 \ N$

The maximum acceleration of the bag is $a = 2.40 \ m/s^2$

Generally this normal force experience by the bag is mathematically represented as

$F_n = mg cos \theta$

=> $225 = (25 * 9.8) cos \theta$

=> $0.9183 = cos \theta$

=> $\theta = cos^{-1}[0.9183]$

=> $\theta = 23.32^o$

Generally for the bag not to slip , it means that the frictional force is equal to the sliding force

$F_f = F_s$

Hence $F_f$ is mathematically represented as

$F_f = \mu_s * F_n$

While $F_s$ is mathematically represented as

$F_s = m * a$

So

$\mu_s * F_n = m * a$

=> $\mu_s * 225 = 25 * 2.40$

=> $\mu_s = 0.27$

Generally from the workdone equation we have that

$KE_f - KE_i = W_f$

Here $W_f$ is the work done by friction which is mathematically represented as

$W_f = m * g * \mu_k * s$

Here s is the distance covered by the bag

$KE_f$ is zero given that velocity at rest is zero

and

$KE_i = \frac{1}{2} * m* v_i^2$

so

$\frac{1}{2} * m* v_i^2 = m * g * \mu_k * s$

=> $\frac{1}{2} * v_i^2 = g * \mu_k * s$

substituting 2.55 m/s for v_i and 0.350 for \mu_k we have that

$\frac{1}{2} * 2.55^2 = 9.8 * 0.350 * s$

=> $s = 0.948 \ m$

4 0

3 years ago

4. Ano ang matinding suliranin ang kakaharapin kapag patuloy ang pagkasira ng

jasenka [17]

Answer:

I think its D

Explanation:

Kasi Pinoy ako

5 0

3 years ago

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The diagram below shows the relative positions of Earth and the Sun at a certain time of the year. Based on the diagram, which s

AlladinOne [14]

Answer:

summer

Explanation:

Notice the higher density of the rays of the sun hitting straight the latitudes below the equator.

7 0

3 years ago

As Earth moves around the Sun, its _____ is approximately perpendicular to the force of gravity exerted by the Sun.

Bogdan [553]

SORRY i forgot but i think its A because the sun has a really strong gravitational pull

sorry and hope it helps

4 0

2 years ago

Read 2 more answers

A patient has an ongoing history of cancer. She has a tumor in the abdominal region, and has been undergoing treatment for it. T

Vadim26 [7]

Answer:

the answer is at the BOTTOM OF THEIR QUESTION

Explanation:

IT IS CORRECT BTW

6 0

3 years ago