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4 years ago

Which would increase the speed of a sound wave?

Physics

1 answer:

nirvana33 [79]4 years ago

6 0

Answer:

it's option 2 : the medium increases in temperature while remaining in the same phase

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Explain how you think humans have disrupted the nitrogen cycle HELP QUICK DUE APRIL 15TH ANYBODY

mina [271]

Answer:

Scientists have determined that humans are disrupting the nitrogen cycle by altering the amount of nitrogen that is stored in the biosphere. The chief culprit is fossil fuel combustion, which releases nitric oxides into the air that combine with other elements to form smog and acid rain.

5 0

3 years ago

A suspension bridge with weight uniformly distributed along its length has twin towers that extend 65 meters above the road surf

Fynjy0 [20]

Answer:

16.25 m

Explanation:

we know that the equation pf parabola

$y=kx^2$

from bellow figure the coordinate of parabola is (600,65) that is y=600 and x=65

putting the the value of y and x in the equation of parabola

$65=k600^2$

k=0.0001805

now the equation is

$y=0.0001805x^2$

we have to find the value of y at x=300m

so $y=0.0001805\times 300^2$

y=16.25 m

4 0

3 years ago

The component of the external magnetic field along the central axis of a 18 18 turn circular coil of radius 27.0 27.0 cm decreas

madreJ [45]

Answer:

Induced current I = 0.44 A

Explanation:

given data

no of turn N = 18

radius = 27.0 cm

resistance of the coil = 4.50 Ω

time = 2.90 s

magnetic field = 1.90 T to 0.500 T

solution

we get Induced EMF that is

E = - dφ ÷ dt ..............1

E = - N × A × (B2 - B1) ÷ Δt

E = N × A × (B1 - B2) ÷ Δt

area of cross section of the coil A = π × r²

area of cross section = 3.14 × (0.27)²

area of cross section = 0.228 m²

Initial magnetic field B1 = 1.9 T

and

Final magnetic field B2 = 0.5 T

time Δt = 3.7 s

put here value and we get

E = $\frac{18 \times 0.228 \times (1.9-0.5)}{2.90}$

E = 1.98 V

and

Induced current I is express as

Induced current I = E ÷ R ................2

Induced current I = $\frac{1.98}{4.5}$

Induced current I = 0.44 A

3 0

3 years ago

A plane traveled south for 2.5 hrs at a velocity of 1200km/hr. What distance did it travel?

Oxana [17]

From the formula, V=displacement/time
displacement/distance =velocity*time
distance=1200*2.5
distance=3*10³km

6 0

3 years ago

A merry-go-round with a a radius of R = 1.63 m and moment of inertia I = 196 kg-m2 is spinning with an initial angular speed of

Ulleksa [173]

Answer:

299.88 kgm²/s

499.758 kgm²/s

Explanation:

R = Radius of merry-go-round = 1.63 m

I = Moment of inertia = 196 kgm²

$\omega_i$ = Initial angular velocity = 1.53 rad/s

m = Mass of person = 73 kg

v = Velocity = 4.2 m/s

Initial angular momentum is given by

$L=I\omega_i\\\Rightarrow L=196\times 1.53\\\Rightarrow L=299.88\ kgm^2/s$

The initial angular momentum of the merry-go-round is 299.88 kgm²/s

Angular momentum is given by

$L=mvR\\\Rightarrow L=73\times 4.2\times 1.63\\\Rightarrow L=499.758\ kgm^2/s$

The angular momentum of the person 2 meters before she jumps on the merry-go-round is 499.758 kgm²/s

5 0

3 years ago