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kozerog [31]
3 years ago
12

1. At a local salon called Curl up and Dye a woman has mysteriously become

Physics
1 answer:
lord [1]3 years ago
3 0

Answer:

30mL FAX

Explanation:

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How do scientists determine the number of neutrons in an isotope of an atom?
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D.  The atomic mass in amu is basically the number or nuclei since the mass of the electrons is negligible.  For a given atom (element) the number of protons is fixed.  Say the element has 10 protons.  If the atomic weight is 14 atomic mass units (amu), you know that there are 4 neutrons, since both neutrons and protons are 1 amu each and there are 10 protons
4 0
3 years ago
A rotating fan completes 1200 revolutions every minute. Consider the tip of a blade, at a radius of 0.15 m. (a) Through what dis
olga55 [171]

Answer:

(a) 0.942 m

(b) 18.84 m/s

(c) 2366.3 m/s²

(d) 0.05 s

Explanation:

(a) In one revolution, it travels through one circumference, 2πr = 2 × 3.14 × 0.15 m = 0.942 m.

(b) Its frequency, f, is 1200 rev/min = \dfrac{1200}{60}rev/s = 20 rev/s.

Its angular frequency, ω = 2πf = 2π × 20 = 40π

The speed is given by

v = ωr = 40π × 0.15 = 6π = 18.84 m/s

(c) Its acceleration is given by, a = ω²r = (40π)² × 0.15 = 2366.3 m/s²

(d) The period is the inverse of the frequency because it is the time taken to complete one revolution.

T = \dfrac{1}{f}

T = 1/20 = 0.05 s

6 0
3 years ago
Which part of the ear vibrates at the frequency of sound waves
olganol [36]
The ear drum vibrates

6 0
3 years ago
Which theory of language development and acquisition includes the concepts of reinforcement, stimuli control, deprivation, and a
uranmaximum [27]

The answer is: a. Skinner’s idea of language

<span>Skinner was a psychologists and one of the first behaviorists. In his language acquisition theory, he states that language acquisition is an environmental and social phenomenon; therefore, children acquire language through operant conditioning, which includes stimuli control, reinforcement (positive and aversive), and deprivation.</span>

6 0
3 years ago
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An astronaut weighing 248 lbs on Earth is on a mission to the Moon and Mars. (a) What would he weigh in newtons when he is on th
lesantik [10]

Answer:

W_m=183.495N

Explanation:

From the question we are told that:

Weight W=248Ibs

Mass of Weight  m= 248*0.453

                          m=112.344kg

Generally the acceleration due to gravity on the Moon is one-sixth that on Earth.

Therefore

The equation for Weight on Moon is given as

 W_m=m*g/6

 W_m=122.344*\frac{9.8}{6}

 W_m=183.495N

3 0
3 years ago
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