DoubleJ

Assume the following to be true about newborn hearing loss and screening:

The prevalence of newborn hearing loss is 1%.

The sensitivity of screening is 95% (i.e., 5% of those with hearing loss will be missed by the screening).

The specificity of screening is 80% (i.e., 20% of those who fail screening will subsequently be found to be normal-hearing).

Given that a newborn fails the screening, what is the probability that they actually do have hearing loss?

(HINT: the definition of “conditional probability” is key to solving this problem.)

2) Two astronauts, one of mass 60 kg and the other 82 kg, are initially at rest in outer space. They then push each other apart. How far apart are they when the lighter astronaut has moved 13 m?

____m

1) A 19 g rifle bullet traveling 250 m/s buries itself in a 3.1 kg pendulum hanging on a 2.7 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal components of the pendulum's displacement.

vertical ______m

horizontal____m

2) Two astronauts, one of mass 60 kg and the other 82 kg, are initially at rest in outer space. They then push each other apart. How far apart are they when the lighter astronaut has moved 13 m?

______m

3) A ball of mass m makes a head-on elastic collision with a second ball (at rest) and rebounds with a speed equal to one-third its original speed. What is the mass of the second ball? (Use the following as necessary: m)

M2= _____

Please help PHYSICS Linear Momentum :(?

1) A tennis ball of mass m = 0.055 kg and speed v = 15 m/s strikes a wall at a 45° angle and rebounds with the same speed at 45°. What is the impulse given the wall?

Magnitude

__________N·sDirection

2) A 19 g rifle bullet traveling 250 m/s buries itself in a 3.1 kg pendulum hanging on a 2.7 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal components of the pendulum's displacement.

vertical ______m

horizontal____m

3) Two astronauts, one of mass 60 kg and the other 82 kg, are initially at rest in outer space. They then push each other apart. How far apart are they when the lighter astronaut has moved 13 m?

______m

4) A ball of mass m makes a head-on elastic collision with a second ball (at rest) and rebounds with a speed equal to one-third its original speed. What is the mass of the second ball? (Use the following as necessary: m)

m2 = _____

1) A coin is placed 14.5 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 40 rpm is reached, at which point the coin slides off. What is the coefficient of static friction between the coin and the turntable?

2) Suppose that a binary star system consists of two stars of equal mass. They are observed to be separated by 340 million kilometers and take 5.0 Earth years to orbit about a point midway between them. What is the mass of each?

______ kg

3) During an Apollo lunar landing mission, the command module continued to orbit the Moon at an altitude of about 90 km. How long did it take to go around the Moon once?

____ min

1) A coin is placed 14.5 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 40 rpm is reached, at which point the coin slides off. What is the coefficient of static friction between the coin and the turntable?

2) Suppose that a binary star system consists of two stars of equal mass. They are observed to be separated by 340 million kilometers and take 5.0 Earth years to orbit about a point midway between them. What is the mass of each?

______ kg

3) During an Apollo lunar landing mission, the command module continued to orbit the Moon at an altitude of about 90 km. How long did it take to go around the Moon once?

____ min

Could someone please explain to me how to do this

1) A ball is shot from the top of a building with an initial velocity of 20 m/s at an angle θ = 40° above the horizontal.

(a) What are the x and y components of the initial velocity?

vx = ____ m/s

vy = _____ m/s

(b) If a nearby building is the same height and 55 m away, how far below the top of the building will the ball strike the nearby building?

______ m

1) A delivery truck travels 25 blocks north, 25 blocks west and 24 blocks south. What is its final displacement from the origin? Assume the blocks are equal length.

Magnitude

_____ blocks

Direction

_______ ° (counterclockwise from east is positive)

2) You are given a vector in the xy plane that has a magnitude of 100.0 units and a y component of -60.0 units. What are the two possibilities for its x component?

_____

______

3) A diver running 1.7 m/s dives out horizontally from the edge of a vertical cliff and 3.4 s later reaches the water below.

How high was the cliff?

_____ m

How far from its base did the diver hit the water?

_____ m

4) An athlete executing a long jump leaves the ground at a 25° angle and travels 8.30 m.

(a) What was the takeoff speed?

____ m/s

(b) If this speed were increased by just 5.0%, how much longer would the jump be?

___ m

5) A hunter aims directly at a target (on the same level) 120 m away.

(a) If the bullet leaves the gun at a speed of 230 m/s, by how much will it miss the target?

_____ m

(b) At what angle should the gun be aimed so as to hit the target?

____ °

Physics help physics stuck?

A stone is thrown vertically upward with a speed of 13.0 m/s from the edge of a cliff 65.0 m high.

(a) How much later does it reach the bottom of the cliff?

_______ s

(b) What is its speed just before hitting?

_______ m/s

(c) What total distance did it travel?

______ m

1)) Discuss how you would estimate the number of hours you have spent in school thus far in your life. Then make the estimate.

2)) What are the merits and drawbacks of using a person's foot as a standard? Discuss in terms of ease of comparison, invariability, indestructibility, and reproduceability.

(a) Consider a system using a particular person's foot.

(b) Consider a system using any person's foot.

1)))---,Jean camps beside a wide river and wonders how wide it is. She spots a large rock on the bank directly across from her. She then walks upstream until she judges that the angle between her and the rock, which she can still see clearly, is now at an angle of 30° downstream (Figure 1-17). Jean measures her stride to be about one yard long. The distance back to her camp is 72 strides. About how far across, both in yards and in meters, is the river?

yards??

m??

2))-- A typical adult human lung contains about 290 million tiny cavities called alveoli. Estimate the average diameter of a single alveolus. Assume the alveoli are spherical and a typical human lung is about 1.9 liters.

___ m??

3))

Global positioning satellites (GPS) can be used to determine positions with great accuracy. The system works by determining the distance between the observer and each of several satellites orbiting Earth. If one of the satellites is at a distance of 22,000 km from you, what percent accuracy in the distance is required if we desire a 6 meter uncertainty?

_____%?

How many significant figures do we need to have in the distance?

1)Global positioning satellites (GPS) can be used to determine positions with great accuracy. The system works by determining the distance between the observer and each of several satellites orbiting Earth. If one of the satellites is at a distance of 22,000 km from you, what percent accuracy in the distance is required if we desire a 6 meter uncertainty?

%

How many significant figures do we need to have in the distance?

2()))) Estimate the number of gallons of gasoline consumed by the total of all automobile drivers in the United States, per year. Assume there are about 300,000,000 people in the United States, half of them have cars, they each drive 11,000 miles per year, and their cars get 20 miles per gallon of gas.

.........? gal/year.

3))) A typical adult human lung contains about 290 million tiny cavities called alveoli. Estimate the average diameter of a single alveolus. Assume the alveoli are spherical and a typical human lung is about 1.9 liters.

....? m

Could someone please explain this to me?

my friend and i each have theories about how different variables ---schooling, age, hair color, etc--- relate to IQ. we decide to test our theories by predicting the IQS of some psychology majors. i predict that each of my 20 participants will have an IQ between 85 and 145. and i am correct about all twenty participants. my friend predicts that one student will have an IQ of 100-105, anf the other will have an IQ of 100-165. and she is correct about both participants. whose theory has stronger support, and why?

Could someone please help me.

My period was suppose to start February 15. its late almost a week.

I was very stressed out for the last 3 weeks, getting married, school, work. so many things were happening at once, and organzing a party for 150 people for my engagement last week.

It could be because of stress. my stomach is swollen, pain right above ovaries, all i want to do is rest.

maybe also for the alst week, my sleep patterns were crazy, and i only slept 4 hours for the whole week

also i was with my fiance' last week, we were 'together" but not really. meaning we never had intercourse, but we foreplayed and humped. we were both with underwear, and ive never had sex ever, im still a virgin. but could it be that i am pregnant? please tell me no?

complete the final two columns in the following frequency distribution table and then use interpolation to find the percentiles and percentile ranks requested:

X f cf c%

10 2

9 5

8 8

7 15

6 10

5 6

4 4

a) What is the percentile rank for X=6?

b) What is the percentile rank for X=9?

c) What is the 25th percentile?

d) What is the 90th percentile?

22) the following frequency distribution presents a set of exam scores for a class of N=20 students.

X f cf c%

90-99 4 20 100

80-89 7 16 80

70-79 4 9 45

60-69 3 5 25

50-59 2 2 10

a) Find the 30th percentile?

b) Find the 88th percentile?

c) What is the percentile rank for the X =77?

d) What is the percentile rank for X = 90?

Referring to the team decision-making process, define consensus and unanimity and explain the difference between the two.

I am 21, i have NY driver license, I've been driveing since 17. I'm moving to california next year, and would like information in how the process in transferring license based on reloction to different state.

1) what do i have to do step by step

2) how much will is cost

3) how long is the process

4) do i need to officailly live there asa resident, or i can begin now?

Thank you

It was love at first sight after just one dance! I never believed in love, and that it can be so magical, and the thought not having this feeling would kill me. He proved me wrong! he never believed in long distance relationship and i proved him wrong. We can't imgine not spending our lives togetehrer. He is the one, and he stole my heart, and he says i swept him his feet, and that he promises to always love me no matter what. I feel the same way about him, and would never ever imagine being with anyone else. He proposed, and we are getting married next year. This is where i am getting scared about and worried. He lives in a different state, 6 hours by plane. I can move, i want to move, and i will move, becuase our love is so strong. but i am scared, im being honest, i worry about my family, leaving my life behind, not having my friends and family by myside.

someone please tell me what they think? what would you do if you finally found love, and happiness, and will know that you will be ahppy with that person, but away from your family?

I met a guy at a party, it was love at first sight. He asked me to dance, and after that dance, we both felt something unusal. Like both of our worlds has turn over, and a mix of sparks and chemistry. I never believed in love at first sight, he proved me wrong. He lives in a different state, and he never belived in long distance relationship, I proved him wrong. We only danced and talked for 10 minutes. and then we departed. i went home, he went home. 2 hours later, he found me on FB, we emailed back and forth for 1 week, then it went on to the phone calls. for one month we called, texted, and emailed. Month later, he couldn't wait any longer, bought tickets to come see me for the weekend. It was the best 3 days of my life. I ve never been so happy, ive never smiled for so long, ive never felt this way, and he says the same. When he flew back home, we actually cried! if this is not love what is!

Now this is where i need advice. I know what i want, i know what he wants, i know that he is the one, and then i will always be happy with him. He is going to propose, and i know the answer, but this is the real qeustion, he wants me to move to his state, he promises he will to make sure i will be happy, and that whenever i will miss my family (which is the biggest problem for me :( ) he will always get me tickets to visit them.

Ladies and guys: tell me what you think? I know this is love, I know he is going to be an amazing husband, and before i get engaged, do you think i should move?