Echo is a ___________ of sound?A. Reflection
B. Refraction
C. Interference
D. None
B. Refraction
C. Interference
D. None
A. Sight
B. Sound
C. Both of these
D. None of these
A. 5,778 Kelvin
B. 6,778 Kelvin
C. 7,778 Kelvin
D. 9,778 Kelvin
A. 5.972 × 1024 kg.
B. 6.972 × 1024 kg
C. 7.972 × 1024 kg
D. 8.972 × 1024 kg
A. 2
B. 3
C. 4
D. 5
Earth’s atmosphere is divided into five main layers: the exosphere, the thermosphere, the mesosphere, the stratosphere and the troposphere.
A. 897 kg/m³
B. 997 kg/m³
C. 1000 kg/m³
D. 1025 kg/m³
A. 1.024 g/cm3
B. 1.034 g/cm3
C. 1.044 g/cm3
D. 1.054 g/cm3
The density of raw milk depends on its composition and temperature and can usually – literature data vary slightly – be found in the range of 1.026 g/cm3 – 1.034 g/cm3 at 20°C.