Everything Science Grade 10

CHAPTER 25. EXERCISE SOLUTIONS 25.11

22. 34 , 4 m

23.

1 812, 5 mm

24. 172 m

25. (a)

sound

waves

(b)

transverse

waves

(c)

wavelength

(d)

frequency

(e)

amplitude

(f)wave

speed

(g) wave

speed

(h)

period

EM radiation ESAIS

End of chapter exercises ESAIT

1. 2. 0 × 10 −^25 J

2. 3 × 10 −^19 J

3. 8 , 6 × 10 −^21 J

4. 3 , 0 × 103 m

5. For the photon with wavelength 532 nm:

E= 3, 7 × 10 −^19 J

For the photon with frequency 13 Hz: E=

8 , 6 × 10 −^24 J

The energy of the second photon is: 2 , 3 ×

10 − 2 m.

6. Radio, microwave, infrared, visible, ultra-

violet, X-ray, gamma ray

The particles that

substances are made of

ESAIU

End of chapter exercises ESAIV

1. (a)molecule

(b)empirical formula

(3) (a)covalent

(b)NH 3

(c)

(d)

(4) (a)covalent molecular

(b)metallic network

(c) covalent network

(d)covalent molecular

(e) ionic network

(5) (a)carbon dioxide

(b)CO 2

(c) covalent

Chemistry: Chemical systems 489