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DerKrebs [107]
3 years ago
14

A national college researcher reported that 67%of students who graduated from high school in 2012 enrolled in college. Twenty-ni

ne high school graduates are sampled What is the mean number who enroll in college in a sample of 29 high school graduates? Round the answer to two decimal places. a) What is the standard deviation of the number who enroll in college in a sample of 29 high school graduates?
Physics
1 answer:
dsp733 years ago
4 0

Answer:

Explanation:

Theorem of Binomial Distribution will apply here.

n = 29 , p = .67 , q = 0.33

mean = np = 29 x .67 = 19.43

Standard Deviation = √npq

= √29 x .67 x .33

= √6.4

= 2.53

=

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Calculate the radius of the orbit of a proton moving at 2.2x10^6 m/s in a magnetic field 0.7 T where v and B are perpendicular.
Juliette [100K]

Answer:

3.28 cm

Explanation:

To solve this problem, you need to know that a magnetic field B perpendicular to the movement of a proton that moves at a velocity v will cause a Force F experimented by the particle that is orthogonal to both the velocity and the magnetic Field. When a particle experiments a Force orthogonal to its velocity, the path it will follow will be circular. The radius of said circle can be calculated using the expression:

r = \frac{mv}{qB}

Where m is the mass of the particle, v is its velocity, q is its charge and B is the magnitude of the magnetic field.

The mass and  charge of a proton are:

m = 1.67 * 10^-27 kg

q = 1.6 * 10^-19 C

So, we get that the radius r will be:

r =  \frac{1.67 * 10^-27 kg * 2.2*10^6 m/s}{1.6 * 10^-19 C* 0.7 T} = 0.0328 m, or 3.28  cm.

8 0
3 years ago
Which is a characteristic of projectile motion?A force can affect the _____ of an object.
Olin [163]

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mass of an object

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because mass of an object changes it’s force

5 0
2 years ago
When sediment is moved around by wind it is called?
Digiron [165]

Answer:

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seropon [69]

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Explanation:

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3 years ago
#1 a person weighs 540n on earth what is the persons mass.
bixtya [17]

Answer:

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#1

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#2

W=mg

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8 0
2 years ago
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