Answer:
Option 3
Explanation:
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Sound waves are invisible and can move through the water, therefore the correct answer is option D.
What is a sound wave?It is a particular variety of mechanical waves made up of the disruption brought on by the movements of the energy. In an elastic medium like the air, a sound wave travels through compression and rarefaction.
Sound waves cannot travel in a vacuum, and they are invisible in nature.
While electromagnetic waves are transverse waves, sound waves are longitudinal waves, and the temperature of the medium in which they travel greatly affects the speed of the sound.
The mathematical expression for the speed of the sound in air is given by
v= √γRT
where v is the speed of the sound
R is the ideal gas constant
T is the temperature
γ is the adiabatic index
The speed of sound in air at 0° Celcius is 330 m/s.
Since sound waves can travel through water and are invisible, option D is the appropriate answer.
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What would happen to the magnetic field if she connects the battery in the opposite direction? the field would stop. the field would get stronger. the field would reverse its poles. the field would get weaker.
When the battery is connected in the opposite direction : ( C ) The field would reverse its poles.
Effect of reverse battery connection on electric fieldIn an electrical experiment, when the battery used is connected in opposite directions, the electric field would reverse its poles. because the poles of the battery is reversed the electric field will also be reversed in response.
Hence we can conclude that When the battery is connected in the opposite direction : ( C ) The field would reverse its poles.
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Answer:
The answer is c ez
Explanation:
Which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?
a 50kg couch
a 5kg dining chair
a 75kg dining table
an 10kg end table
Answer:75 kg
Explanation:
I took the test edge
What is the direction of the acceleration of an object, relative to the direction of its velocity, when that object is speeding up
Answer:
Same direction.
Explanation:
The acceleration in this instance will be in the same direction as the velocity if the velocity is increasing without changing direction .
A block glass of mass 187.5g is 5cm long t 2cm thick and 75cm high. calculate the density of the in kg/cm^3
Answer:.00025 or .25 x 10^-3
Explanation:weird units! Density=mass/volume=.1875 kg/(2x75x5).
what were two weakness of america government under the articals of confederation did the philadelphia mutiny highlight
The weaknesses of the America government under the articals of confederation in which the Philadelphia mutiny highlighted include:
Inability to regulate commerce.Inability to form a military.What is a Mutiny?This is a rebellious act among group of people in order to oppose a certain authority or government.
The government couldn't give soldiers a good working condition due to lack of funds which led to mutiny.
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How far must a 2.0-cm-diameter piston be pushed down into one cylinder of a hydraulic lift to raise an 9-cm-diameter piston by 30 cm
The distance the 2.0-cm-diameter piston must be pushed down to raise 9 cm diameter is 607.5 cm.
Distance the piston must be pushed down
The distance the piston must be pushed down is calculated as follows;
A₁d₁ = A₂d₂
πr₁²d₁ = πr₂²d₂
r₁²d₁ = r₂²d₂
(1)²(d₁) = (4.5)²30
d₁ = 607.5 cm
Thus, the distance the 2.0-cm-diameter piston must be pushed down to raise 9 cm diameter is 607.5 cm.
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