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Lorico [155]
3 years ago
5

Which statement is true of a wave that’s propagating along the pavement and girders of a suspension bridge?

Physics
2 answers:
alexandr1967 [171]3 years ago
8 0
The statement which is true of a wave that’s propagating along the pavement and girders of a suspension bridge is A. The wave is mechanical, with particles vibrating in a direction that is parallel to that of the wave, forming compressions and rarefactions.
sergey [27]3 years ago
5 0
The answer to this question is A
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6. A pitcher throws a ball toward home plate 18.39 meters away. If the ball is traveling at a constant 40.0 m/s, how long does i
Kruka [31]
18.39 I don’t know this
3 0
3 years ago
A coaxial cable consists of a solid inner cylindrical conductor of radius 2 mm and an outer cylindrical shell of inner radius 3
4vir4ik [10]

Answer:

d) 1.2 mT

Explanation:

Here we want to find the magnitude of the magnetic field at a distance of 2.5 mm from the axis of the coaxial cable.

First of all, we observe that:

- The internal cylindrical conductor of radius 2 mm can be treated as a conductive wire placed at the axis of the cable, since here we are analyzing the field outside the radius of the conductor. The current flowing in this conductor is

I = 15 A

- The external conductor, of radius between 3 mm and 3.5 mm, does not contribute to the field at r = 2.5 mm, since 2.5 mm is situated before the inner shell of the conductor (at 3 mm).

Therefore, the net magnetic field is just given by the internal conductor. The magnetic field produced by a wire is given by

B=\frac{\mu_0 I}{2\pi r}

where

\mu_0 is the vacuum permeability

I = 15 A is the current in the conductor

r = 2.5 mm = 0.0025 m is the distance from the axis at which we want to calculate the field

Substituting, we find:

B=\frac{(4\pi\cdot 10^{-7})(15)}{2\pi(0.0025)}=1.2\cdot 10^{-3}T = 1.2 mT

8 0
3 years ago
Singly charged gas ions are accelerated from rest through a voltage of 10.3 V. At what temperature (in K) will the average kinet
Natasha_Volkova [10]

Answer:

Temperature of the gas molecules is 7.96 x 10⁴ K

Explanation:

Given :

Ions accelerated through voltage, V = 10.3 volts

The work done to change the position of singly charged gas ions is given by the relation :

W = q x V

Here q is charge of the ions and its value is 1.6 x 10⁻¹⁹ C.

Average kinetic energy of gas molecules is given by the relation:

K.E. = \frac{3}{2}kT

Here T is temperature and k is Boltzmann constant and its value is 1.38 x 10⁻²³ J/K.

According to the problem, the average kinetic energy of gas is equal to the work done to move the singly charged ions, i.e. ,

K.E. = W

\frac{3}{2}kT = qV

Rearrange the above equation in terms of T :

T= \frac{2qV}{3k}

Substitute the suitable values in the above equation.

T=\frac{2\times1.6\times10^{-19}\times10.3 }{3\times1.38\times10^{-23} }

T = 7.96 x 10⁴ K

5 0
3 years ago
How much heat is required to convert 12.0 g of ice at -10.0°C to steam at 100.0°C. Express your answer in joules, calories, and
Kruka [31]
You can’t solve it because you don’t have c in the question
3 0
2 years ago
Lee has a mass of 40.0 kg and ice skates with a speed of 4.6 m/s.
faltersainse [42]

Their common speed is 1.53 m/s.

<h3>What is speed?</h3>

Speed can be defined as the ratio of the distance to the time of a body in motion.

  To calculate their final speed, we use the formula below.

Formula:

  • mu+m'u' = V(m+m')............. Equation 1

Where:

  • m = mass of the Lee
  • m' = mass of Mat
  • u = initial speed of Lee
  • u' = initial speed of Mat
  • V = Their common speed.

make V the subject of the equation

  • V = (mu+m'u')/(m+m')........... Equation 2

From the question,

Given:

  • m = 40 kg
  • m' = 80 kg
  • u = 4.6 m/s
  • u' = 0 m/s

Substitute these values into equation 2

  • V = [(40×4.6)+(80×0)]/(40+80)
  • V = 184/120
  • V = 1.53 m/s.

Hence, Their common speed is 1.53 m/s.

Learn more about speed here: brainly.com/question/3004254

6 0
2 years ago
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