Answer:
the intensity of the sound waves produced by one 60-w speaker at a distance of 1.0 m is 60 w/m²
Explanation:
Intensity of sound , I, is given as;
I = P/A
Where;
P is the power through an area = 60-w
A is the area = ?
A = 1.0m × 1.0m = 1.0 m²
I = 60-w / 1.0 m²
I = 60 w/m²
Therefore, the intensity of the sound waves produced by one 60-w speaker at a distance of 1.0 m is 60 w/m²
according to ideal gas equation , we have
PV = n RT
where P = pressure , V = Volume , n = number of moles , R = gas constant and
T = temperature
the formula can be rearranged as
T = PV/(nR)
at constant temperature , the formula can be reformed as
T₁ = T₂
P₁V₁/(nR) = P₂V₂/(nR)
hence
P₁V₁ = P₂V₂
where
P₁ = initial pressure
P₂ = final pressure = 2 P₁
V₁ = initial volume
V₂ = final volume
P₁V₁ = (2 P₁ )V₂
V₁ = (2) V₂
V₂ = V₁ /2
hence the Volume is halved
Newton's first law of motion is an object in motion stays in motion until acted upon by another force. Driving at 30 mph in a car is going to stay constant until you crash the car into a wall, stopping the car.
Answer:
F = 33.12 N
Explanation:
given,
first force = 15 N is oriented at 58.0° counterclockwise
second force = (−19.0 N,18.5 N)
x-component of first force = 15 cos 58.0° = 7.95 N
y-component of second force = 15 sin 58.0° = 12.72 N
second component
now,
F netx = 7.95 - 19 = -11.05 N
F nety = 12.72 + 18.5 = 31.22 N
F = 33.12 N
θ = -70.51°
The answer is; A
As the ball bounces, the kinetic energy is lost as heat and therefore the initial energy of the ball reduces. The ball, therefore, bounces to a less height with each bounce. As the ball hits the floor, it deforms and reforms again. This compression and decompression including friction between the ball and floor are some of the contributors to the loss of its energy to heat (that also warms it up).