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mixer [17]
4 years ago
5

Question 3 of 10

Physics
2 answers:
Fynjy0 [20]4 years ago
5 0

Answer: D

Explanation: a p e x :)

rosijanka [135]4 years ago
3 0

Answer:

B. The magnetic field pushes negative charges and positive charges in opposite directions.

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A heat engine operates with 70.0 kcal of heat supplied and exhausts 30.0 kcal of heat. How much work did the engine do?
gladu [14]

The work done by the heat engine is 40 kCal.

The given parameters;

  • input heat of the engine, Q₁ = 70 kCal
  • output heat of the engine, Q₂ = 30 kCal

To find:

  • the work done by the heat engine

The work done by the heat engine is the change in the heat energy of the engine;

W = Q₂ - Q₁

Substitute the given parameters and solve work done (W)

W = 70 kCal - 30 kal

W = 40 kCal

Thus, the work done by the heat engine is 40 kCal.

Learn more here: brainly.com/question/4280097

4 0
3 years ago
The type of chemical bond that involves the transfer of electrons between atoms is a(n) bond.
GaryK [48]
<h3>Answer;</h3>

<em>-Ionic bond</em>

<h3>Explanation;</h3>
  • <u>Ionic bond</u> is a type of bonds that results from transfers of electrons from one atom to another.  This types of bond is formed between metals and non metals.
  • Metals lose electrons to form cations (positively charged ion) and non metals gain electrons forming anions, negatively charged ion.
  • For instance; between sodium and chlorine element; sodium donates a single electron to attain a stable configuration while chlorine gains an electron to achieve stable configuration, thus forming an ionic compound sodium chloride.
7 0
3 years ago
Read 2 more answers
2. A string with a length of 0.9m that is fixed at both ends
aliina [53]

Answer:

2a.) Wavelength = 1.8 m

2b.) F = 66.67 Hz

3a.) Find the attached file

3b.) Wavelength = 0.6 m

Explanation:

Given that the

Length L = 0.9m

Wavelength (λ) = 2L/n

Where n = number of harmonic

If n = 1, then

Wavelength (λ) = 2L = 2 × 0.9 = 1.8 m

b.)

 If waves travel at a speed of 120m/s on this string, what is the frequency

associated with the longest wave (first harmonic)?

Given that V = 120 m/s

V = Fλ

But λ = 2L, therefore,

F = V/2L

F = 120/1.8

F = 66.67 Hz

3. b.) If there are two node, the position will be in 3rd position which is 3rd harmonic

Using the same formula,

Wavelength (λ) = 2L/n

Where n = 3

Wavelength (λ) = 2 × 0.9/3

Wavelength (λ) = 0.6 m

3 0
3 years ago
The old-fashioned record player had two speeds: one for long-playing albums (LP) and one for singles. The turntable speed for LP
eimsori [14]

Answer:

\alpha = 0.305 rad/s^2

Explanation:

initial frequency of revolution is given as

f_1 = 100/3 rpm

now initial angular speed is

\omega_i = 2\pi f

\omega_i = 2\pi(\frac{100}{3\times 60})

\omega_i = 3.49 rad/s

Similarly final angular speed is given as

\omega_f = 2\pi f_2

\omega_f = 2\pi(\frac{45}{60})

\omega_f = 4.71 rad/s

Now angular acceleration is given as

\alpha = \frac{\omega_f - \omega_i}{\Delta t}

\alpha = \frac{4.71 - 3.49}{4}

\alpha = 0.305 rad/s^2

3 0
3 years ago
Anyone trynna join...swaggy<br> https://gotalk.to/yessirrrr
taurus [48]

Answer:

YUHHHHH

Explanation:                    

8 0
3 years ago
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