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saw5 [17]
3 years ago
11

In the expression 3x2y + 4x – 5x2y, are the terms 3x2y and –5x2y like terms? Explain by providing support for your answer.

Physics
2 answers:
lubasha [3.4K]3 years ago
6 0

Answer:

Yes, both terms are same.

Explanation:

The given expression is, 3x^2y+4x-5x^2y.

Let the first term, t_1=3x^2y

The second term, t_1=-5x^2y

Yes, the term 3x^2y\ and\ -5x^2y are like. As in both of these terms, the variables are same. Also, the exponent of the variables are same. These two terms can be added or subtracted.

As a result the given expression is equivalent to 4x-2x^2 y. Hence, this is the required solution.

Zanzabum3 years ago
3 0
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A stationary siren creates an 894 Hz
valentina_108 [34]

Answer:

12.3 m/s

Explanation:

The Doppler equation describes how sound frequency depends on relative velocities:

fr = fs (c + vr)/(c + vs),

where fr is the frequency heard by the receiver,

fs is the frequency emitted at the source,

c is the speed of sound,

vr is the velocity of the receiver,

and vs is the velocity of the source.

Note: vr is positive if the receiver is moving towards the source, negative if away.

Conversely, vs is positive if the receiver is moving away from the source, and negative if towards.

Given:

fs = 894 Hz

fr = 926 Hz

c = 343 m/s

vs = 0 m/s

Find: vr

926 = 894 (343 + vr) / (343 + 0)

vr = 12.3

The speed of the car is 12.3 m/s.

5 0
3 years ago
What is the speed of sound at the atmospheric temperature of 30°C?
12345 [234]

The parcel will undergo projectile motion, which means that it will have motion in both the horizontal and vertical direction.


First, we determine how long the parcel will fall using:


s = ut + 1/2 at²


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5.5 = (0)(t) + 1/2 (9.81)(t)²

t = 1.06 seconds



A

4 0
3 years ago
Read 2 more answers
A block slides down a rough ramp with a 30-degree incline as shown.
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Answer:

Image 4 ?

Explanation:

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3 years ago
Name of a body that changes Chemical energy to electric energy.​
Ratling [72]

Answer:

battery

Explanation:

A battery contains stored chemical energy and converts it to electrical energy. (cK.12)

6 0
3 years ago
The speed v of a sound wave traveling in a medium that has bulk modulus b and mass density ρ (mass divided by the volume) is v=b
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As it is given that Bulk modulus  and density related to velocity of sound

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B = \frac{kg}{m^3} * (\frac{m}{s})^2

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3 years ago
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