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aliina [53]
3 years ago
12

Julie is comparing electromagnetic waves and sound waves. Which of the following words would best complete her chart below? (2 p

oints)
Electromagnetic

Are transverse

Can travel _________

Fastest without a medium

Group of answer choices

without frequency

through any substance

on a curved path

in a vacuum
Physics
2 answers:
melisa1 [442]3 years ago
6 0

Answer:

D: In a vacuum

Explanation:

i took the test

elena55 [62]3 years ago
5 0

Answer:

in a vacuum

Explanation:

In physics, a transverse wave is a moving wave whose oscillations are perpendicular to the direction of the wave or path of propagation. In a transverse wave, the particles are displaced perpendicular to the direction the wave travels. Electromagnetic waves are transverse waves. They require no material medium for propagation and travel fastest in a vacuum.

Sound waves are longitudinal waves. In longitudinal waves, the vibrations are parallel to the direction of wave travel. Sound waves do not travel through vacuum because they require a material medium (air) for propagation. A vacuum has no air hence sound waves do not travel through a vacuum.

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Calculate the KE of a car which has a mass of 1000 kg and is moving at the rate of 20 m/s
Elan Coil [88]

Answer:

The kinetic energy of the car is 2.0\cdot 10^5 J

Explanation:

3 0
2 years ago
A disk of radius 10 cm is pulled along a frictionless surface with a force of 16 N by a string wrapped around the edge. At the i
drek231 [11]

Answer:

t = 0.2845Nm (rounded to 4 decimal places)

Explanation:

The disk rotates at a distance of an arc length of 28cm

Arc length = radius × central angle × π/180

28cm = 10cm × central angle × π/180

Central angle = \frac{28}{10} × 180/π ≈ 160.4°

Torque (t) = rFsin(central angle) , where F is the applied force

Radius in meters = 10/100 = 0.1m

t = 0.1m × 16N × sin160.4°

t = 0.2845Nm (rounded to 4 decimal places)

8 0
3 years ago
There is a clever kitchen gadget for drying lettuce leaves after you wash them. It consists of a cylindrical container mounted s
Maslowich

Answer:

.a = 849.05 m / s²

Explanation

The centripetal acceleration is

            a = v² / r

     

Linear and angular velocity are related

          v = w r

Angular velocity and frequency are related by

        w = 2π f

Let's replace

        a = w² r

         a = 4π² f² r

Let's reduce to the SI system

       f = 2.30 rev / s (2π rad / 1 rev) = 14.45 rad / s

       .r = 10.3 cm = 0.103 m

Let's calculate

       a = 4π² 14.45²  0.103

       .a = 849.05 m / s²

8 0
4 years ago
PLEASE HELP ME WITH THIS ONE QUESTION
adoni [48]

Answer:

B) R1 = 6 V and R2 = 6V

Explanation:

In series, both resistors will carry the same current.

that current will be I = V/R = 12 / (10 + 10) = 0.6 A

The voltage drop across each resistor is V = IR = 0.6(10) = 6 V

6 0
3 years ago
The apparent reversal of motion of planets against the backdrop of fixed stars is called
Free_Kalibri [48]

The planets move eastward against the background of fixed stars with the exception of Venus, Uranus and Pluto moving westward as seen in Earth's sky . This apparent retreating movement is called Retrograde motion. It is illusion created by Earth's movement going by outer planets in their respective orbits.

7 0
3 years ago
Read 2 more answers
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