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3 years ago

Which of the following statements is an accurate description of sound transmission through various mediums?

Physics

2 answers:

Ilia_Sergeevich [38]3 years ago

6 0

The answer is D. Sound insulators prevent sound from being transmitted better than elastic solids. just took PF test

klio [65]3 years ago

5 0

The answer is D. Sound insulators prevent sound from being transmitted better than elastic solids because sound insulators basically muffle and block the sound waves.

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Can you please send me the answers of these pls I will make you brainlist

olga nikolaevna [1]

Answer:

a)= technology is any appliances which makes our work very fast without much manual effort.It is used to make our life simple and easy.

3 0

3 years ago

What is a definition for reactivity with vinegar?

STALIN [3.7K]

The answer to this is Chemical property.

6 0

3 years ago

a large bottle contains a number of medicinal tablets each having a mass of 250mg the mass of all the tablets is 0.5kg calculate

lys-0071 [83]

Considering the change of units and rule of three, the number of tablets in the bottle is 2,000.

First of all, you know that each medicinal tablet has a mass of 250 mg, while the mass of all tablets is 0.5 kg. You can see that the measurements are in different units of measurement, so you must make a change of units so that they are in the same units.

So, knowing that 1 kg is equal to 1,000,000 mg, you can apply the following rule of three: if 1 kg is equal to 1,000,000 mg, 0.5 kg is equal to how many mg?

1 kg ⇒ 1,000,000 mg

0.5 kg ⇒ x mg

So: $x=\frac{0.5 kgx1,000,000 mg}{1 kg}$

x= 500,000 mg

Then, you know that each medicinal tablet has a mass of 250 mg, while the mass of all tablets is 500,000 mg. Now that the values are in the same units, to calculate the number of medicinal tablets you must apply the following rule of three: if 1 tablet has a mass of 250 mg, how many tablets have a mass of 500,000 mg?

$number of medicinal tablets=\frac{500,000 mgx1 tablet}{250 mg}$

number of medicinal tablets= 2,000

Finally, the number of tablets in the bottle is 2,000.

Learn more:

3 0

3 years ago

A boat, the speed of which is 10 m.s-1 relative to the water, sails downstream at an angle of 60 degrees, with the flow of the r

Tems11 [23]

Answer:

resultant velocity of boat will be 11.2249 m/sec

Explanation:

We have given speed of boat $v_b$ = 10 m /sec

Velocity pf current flow $v_c$ = 4 m /sec

Angle at which boat is moving = 60°

We have to find the resultant velocity

We know that resultant velocity is given by $v_r=\sqrt{v_b^2+v_c^2+2v_bv_rcos\Theta}=\sqrt{10^2+4^2+2\times 10\times 4cos60^{\circ}}=11.2249m/sec$

So resultant velocity of boat will be 11.2249 m/sec

4 0

3 years ago

Do simple machines change the amount of work done?

creativ13 [48]

Simple machines make work easier by multiplying, reducing, or changing the direction of a force. The scientific formula for work is w = f x d, or, work is equal to force multiplied by distance. Simple machines cannot change the amount of work done, but they can reduce the effort force that is required to do the work

-Matt

7 0

4 years ago