Answer:The speed of sound is greater in water than in air.
Explanation: The speed of a sound wave in a medium depends upon the density of the medium through which the sound is traveling. We know speed of a mechanical wave can be calculated as Frequency* Wavelength . Frequency does not change with the change of medium. It depends on the source frequency. But wavelength can be altered. As speed of sound is greater in water than in air and frequency remains the same, so wavelength should be increased to compensate the increase in speed of sound wave.
Answer:
m = 47.5 Kg
Explanation:
given,
speed of skater toward north, v = 0.8 m/s
momentum of the skater in north, P = 38 Kg.m/s
mass of the skater = ?
we now,
Momentum is equal to the product of mass and velocity
P = m x v
38 = m x 0.8
m = 47.5 Kg
hence, mass of the skater is equal to 47.5 Kg.
Answer:
8.136×10⁻⁵ J
Explanation:
Applying,
Q = Cv................ Equation 1
Where Q = Charge on the capacitor, v = voltage of the battery, C = capacitance of the capacitor.
From the question,
Given: C = 6.78μF = 6.78×10⁻⁶ F, v = 12 V
Substitute these values into equation 1
Q = (6.78×10⁻⁶ )(12)
Q = 8.136×10⁻⁵ J
Hence the charge on the capacitor is 8.136×10⁻⁵ J
Answer:
The equation for acceleration can be rewritten as B to calculate the net force acting on an object when its mass and acceleration are known.
Explanation:
I hope that helps! (B is the answer)
5320*14= 74480 gallons. <span>
First let us convert gallons to cm^3 and we get 2.819374858x10^8
cm^3.
We then multiply with density and then times 1000 to get it
in terms of tons.
Then multiply the number by 7 to get how many tons of crude
oil a single plane uses in 14 hrs.
Finally divide this by the production of crude oil.
<span>I got 4737 airplanes.</span></span>