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4 years ago

Which of the following is the correct definition of radiation?

Physics

2 answers:

JulsSmile [24]4 years ago

7 0

The correct answer is C

tangare [24]4 years ago

6 0

A. the electromagnetic radiation from the surface of an object which is due to the object's temperature

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Let's assume raspberries are 10 wt% protein solids and the remainder water. When making jam, raspberries are crushed and mixed w

Nataly_w [17]

Answer:

The mass of water boiled off is $0.0 \overline{185}$ kg

Explanation:

The given percentage by weight of protein solids in raspberries = 10 weight%

The ratio of sugar to raspberries in ja-m = 45:55

The mass of the mixture after boiling = 0.4 weight fraction water

Let 's' represent the mass of sugar in the mixture, and let 'r' represent the mass of raspberry

The mass of raspberry, r = 1 kg

The percentage by weight of water in raspberry = 90 weight %

The mass of water in 1 kg of raspberry = 90/100 × 1 kg = 0.9 kg

The ratio of the mass of sugar to the mass of raspberry in jam = r/s = 45/55

∴ s = 1 kg × 55/45 = 11/9 kg

The mass of the mixture before boiling = 1 kg + 11/9 kg = 20/9 kg

The weight fraction of water in the remaining mixture after boiling = 0.4 weight fraction

Let 'w' represent the mass of water boiled off, we have;

(0.9 - w)/(20/9 - w) = 0.4

(0.9 - w) = 0.4 × (20/9 - w)

0.9 - w = 8/9 - 0.4·w

9/10 - 8/9 = w - 0.4·w = 0.6·w = (6/10)·w

(81 - 80)/(90) = (6/10)·w

1/90 = (6/10)·w

w = ((10/6) × 1/90) = 1/54

w = 1/54

The mass of water boiled off, w = (1/54) kg = $0.0 \overline{185}$ kg

7 0

3 years ago

Is density the degree of compactness of a substance?

san4es73 [151]

Yes it is, in other simplified terms density compares the amount of matter an object has to its volume.

5 0

3 years ago

A car has a distance between axles of 6.2 m and a center of mass located 2.2 m from the front axle. What is the

NARA [144]

Answer:

The correct option is C

Explanation:

From the question we are told that

The distance between axles of the car is $d_a = 6.2$

The position of the car's center of mass is $D = 2.2 \ m \ in \ front \ of \ the \ axel$

Now we can evaluate the distance of the center of mass to the rear axle as follows

$k = d_a - D$

substituting values

$k = 6.2 - 2.2$

$k = 4 \ m$

assuming the car is at equilibrium, taking moment about the center of mass

$W_{front \ axle} * D - W_{rear \ axle} * k = 0$

=> $W_{front \ axle} * D = W_{rear \ axle} * k$

=> $\frac{W_{front \ axle}}{W_{rear \ axle} } = \frac{k}{D}$

substituting values

$\frac{W_{front \ axle}}{W_{rear \ axle} } = \frac{4}{2.2}$

$\frac{W_{front \ axle}}{W_{rear \ axle} } = 1.81$ Note [ $W_{front \ axle}$ is the front axle weight and

$W_{rear \ axle}$ is the rear axle weight ]

6 0

3 years ago

Make a list of nutrients found in packed items and amount of nutrient present in them

mezya [45]

Nutrients found in packed items include carbohydrates, fats and proteins and the amount of nutrients present in them is found in calories/grams.

<h3>What are macronutrients?</h3>

Macronutrients are nutrients that contain calories that must be consumed in the diet to perform metabolic functions.

These macronutrients are specified in packed foods, and include proteins, carbohydrates and lipids.

Macronutrients provide 4 calories (proteins and carbohydrates) or 9 calories per gram (fats).

In conclusion, nutrients include carbohydrates, fats (lipids) and proteins and their proportions are expressed in grams.

Learn more about macronutrients here:

brainly.com/question/3313290

#SPJ1

3 0

2 years ago

Question 9 Unsaved A 680-Hz sound wave travels at 340 m/s in air, with a wavelength of 0.5 m. 5 m. 50 m. 500 m. none of the abov

ale4655 [162]

The correct option is 0.5 M

Calculation

Wavelength is defined as the ratio of velocity of a wave to its frequency. It is measure in meters. Mathematically, wavelength is given by the following formula:

Wavelength = wave velocity / frequency

From the details given in the question,

Wavelength =?

Velocity = 340 m/s

Frequency = 680 HZ

Wavelength = 340 /680 = 0.5

Therefore, wavelength = 0.5 M

5 0

3 years ago

Read 2 more answers