Average speed = (distance covered) / (time to cover the distance)
= (20 miles) / (45 minutes)
Multiply that fraction by (60 minutes / 1 hour) .
This is equal to ' 1 ', so you won't change anything except the units.
= (20 miles / 45 minutes) times (60 minutes / 1 hour)
Multiply the fractions, then cancel 'minutes' out of
the numerator and denominator.
= (20 miles x 60) / (45 x 1 hour)
= (20 x 60 / 45) miles/hour
= 26-2/3 miles/hour .
Answer: 1.) The intensity of the sound wave which reaches the listener’s ear.
2.) The square of the amplitude of the sound wave.
3.) The mass of air which can be set into vibration.
Explanation:
Answer:
The term 'mettaloid' is normally applied to a group of between six and nine elements ;
- Boron
- Silicon
- Germanium
- Arsenic
- Antimony
- Tellurium, and possibly
- Bismuth
- Polonium
- Astatine
are found near the center of the P-block or main block of the periodic table.
Explanation: