Ask question

Ask question

All categories

2 years ago

9

Maria determines that the wavelength of a sound wave is 2.50 meters and that the wave is traveling at 340 m/s. What is the frequ

ency of the sound wave?

1 answer:

USPshnik [31]2 years ago

4 0

Frequency = $\frac{speed of wave}{wavelength}$
= $\frac{340}{2.5} = 136 Hz$ .
Hope this helps you, have a great day/night ahead! :)

You might be interested in

In an accident, a solution containing 2.5 kg of nitric acid was spilled. Two kilograms of Na2CO3 was quickly spread on the area

storchak [24]

First we must write a balanced chemical equation for this reaction

$Na_2CO_3 _(_a_q_)+ 2HNO_3_(_a_q_) \implies 2NaNO_3_(_s_) + CO_2_(_g_) + H_2O_(_l_)$

The mole ratio for the reaction between $HNO_3$ and $Na_2CO_3$ is 1:2. This means 1 moles of $Na_2CO_3$ will neutralize 2 moles $HNO_3$ . Now we find the moles of each reactant based on the mass and molar mass.

$2500g HNO_3 \times \frac{mol}{63.01g\ HNO_3} = 39.67 mol\ HNO_3$

$2000g\ Na_2CO_3 \times \frac{mol}{105.99g \ Na_2CO_3} = 18.87 mol\ Na_2CO_3$

$\frac{18.87 mol Na_2CO_3}{39.67\ HNO_3} = \frac{1 molNa_2CO_3}{2 mol HNO_3}$

The $Na_2CO_3$ was enough to neutralize the acid because 18.87:39.67 is the same as 1:2 mol ratio.

4 0

3 years ago

The positively charged particles found in the nucleus of an atom are called ______.

Vikentia [17]

The answer is (c) protons

4 0

2 years ago

How many grams of water are produced when 2.50 mol oxygen reacts with hydrogen?

natali 33 [55]

I think the answer is D

4 0

2 years ago

CARBOHYDRATES are found primarily in plant-based foods and are a major source of energy in the body (4 kcals per gram). If you c

SVETLANKA909090 [29]

Answer:

The 200 grams of carbohydrate would this convert to 800 kcals in a day.

Explanation:

Carbohydrates are the source of energy. The metabolism of 1 gram of carbohydrates gives 4 kcals of energy.

If 200 grams of carbohydrate is consumed in a day, then the energy provided by it is:-

$Energy\ provided\ by\ the\ carbohydrate = 200\times 4\ kcals=800\ kcals$

<u>The 200 grams of carbohydrate would this convert to 800 kcals in a day.</u>

4 0

2 years ago

The Transition Elements can be divided into two types. List each type.

jenyasd209 [6]

Main group elements
transition metals
lanthanides
actindes.

7 0

3 years ago