Answer:
Mechanical waves are defined by which of the following?
C. All of the above
Since, mechanical waves are created when an energy source vibrates, and they carry energy from one place to another through a medium, this is the right option.
Mechanical waves need an energy source to produce them?
True because a mechanical wave needs an initial energy input.
A wave has a wavelength of 100 mm and a frequency of 6 Hz. What is its speed?
600 mm/s
Wave speed = wavelength X frequency
Wave speed = 100 X 6
Wave speed = 600 mm/s
Amplitude of a wave is?
B. How high the wave is from resting point
By definition of amplitude.
Answer:
.team 1 a = 20.8 m/s² team 2 a = 19.2 m/s²
Explanation:
Let's use Newton's second law to calculate the acceleration of the two groups
F = ma
a = F / M
Group 1
a = 9 1354/9 65
a = 20.8 m / s²
Group 2
a = 9 1364/9 71
a = 19.2 m / s²
If the two groups pull against each other, group 1 should win, by creating a greater acceleration.
Δa = 20.8 -19.2
Δa = 1.6 m / s²
Answer:
When the Moon passes between Sun and Earth, the lunar shadow is seen as a solar eclipse on Earth. When Earth passes directly between Sun and Moon, its shadow creates a lunar eclipse. ... But lunar eclipses do not occur every month because the Moon's orbit is tilted five degrees from Earth's orbit around the Sun.
Answer:
1. SG
true
=2.689
2. The object is probably some sort of minerals and rocks such as Feldspar, Corals, Beryl, etc.
Explanation:
Given:
mass in the air= 0.0675 kg
mass in water= 0.0424 kg
No force is required to lift that balloon. In fact, force is required to hold it down, and if you let go, it's up, up, and away.
Since the balloon's density is less than the density of the air around it, it's lighter than the air it displaces, there is a net upward buoyant force acting on it, and it floats up !
