Elisabeth

1. Physics

A 30-06 caliber hunting rifle fires a bullet of mass 0.0101 kg with a velocity of 279 m/s to the right. The rifle has a mass of 3.46 kg. What is the recoil speed of the rifle as the bullet leaves the rifle? Answer in units of m/s.
2. Physics

What is its centripetal acceleration? Answer in units of m/s 2 .
3. Physics

An athlete swings a 2.01 kg ball horizontally on the end of a rope. The ball moves in a circle of radius 0.98 m at an angular speed of 0.44 rev/s. What is the tangential speed of the ball? Answer in units of m/s.
4. science

the small piston of a hydraulic press has an area of 2.0 cm and the large piston has an area of 16 cm if the small piston has a force of 4.0 N applied to it the output force of the large piston is
5. algebra

4/5 x -3 3/4 x 2 1/2 =
6. history,geograph,life science,life orentation,mathematical literacy,english

1.with my school subjects which careers can i study and the entrance requirement for the particular courses and fees and accommodation cost.
7. Math/Science

Explain how you could determine, give the following 3 pieces of information, (you need all 3 together not each one individually) the radius of the Earth. 1)Jakarta and Port Moresby, the capital of pau New Guinea, are two cities on the equator. 2) A plane
8. Astronomy

For this question assume the moon is 110 of its diameter away from the Earth. The largest apparent size of Mercury that we ever see in the sky is 1/150 the apparent diameter of the Moon. The diameter of Mercury is about 4900 km. What is the closest that
9. Science

A jet aircraft is traveling at Mach 2.5 through air at 1 °C. What is the jet's speed in m/sec? I can do the equation myself, I just need to know what equation I need to do in order to find the answer.
10. Religion

I need help interpreting this question, In Isaiah 38 how did Hezekiah feel when he found out he was going to die, some typical or expected things? thanks
11. psychology

Can you help reccomend a good theorist and theory to type an 8 page report to find journal articles as well. I was thinking possibly Freud psychoanaylis theory or maslow hoistic dynamy theory thanks
12. Math

Find the value of n. 2^(2n-1) = 8^(-n)
13. Math

3. It takes 72 tiny cubes to fill an empty box. It is found that the volume of the box is 576 ml. Know that 1 cc = 1 ml. How long is the side of the tiny cube.
14. Chemistry

What happens when red blood cells are placed in a solution that contains 0.99% (m/v) NaCl solution?
15. Math

Calculate the volume of a cylinder that is 5.615 mm in height and 17.03 mm in diameter.
16. Math Riddle-Algebra With Pizzaz

Did you hear about... i have a,b,c,d,e,f,g,n,o..its "the very sad guy who tried to..fog and thats all i have help?
17. Math

(a+bx)(c+dx)=income solve for x
18. Math

An auditorium has 1600 seats. At a ticket price of \$6, the owners can sell 1200 tickets. For each 25 cent increase in price the tickets sold reduces by 25. What price should the owners set to maximize the income? Income=(6+.25x)(1200-25x) Generalize and
19. geometry

The radius of the inscribed circle is equal to twice the area of the triangle divided by the perimeter of the triangle. Prove that this relationship is true for the inscribed circle in any right triangle.
20. Physics

If the resistance of each of the light bulbs is 6.0 ohms, what resistance does the battery see?
21. Math

Find the sum of the first 12 terms of the sequences given in #1. a.f(n) = 5*(2)^(n-1) ; for n = 1,2,3,4,… b.a1 = 1/3 ; an+1 = = 3*an
22. physics

A 350-ohm resistor is connected in series with a 270-ohm resistor. What is their equivalent resistance in ohms?
23. physics

A 250-ohm resistor is connected in parallel with a 190-ohm resistor. What is their equivalent resistance?
24. physics

Candace threw a 0.09 kg ball at an angle such that the downwards initial velocity is 15.00 m/s and the horizontal initial velocity is 18.00 m/s. What is in m/s the vertical component of the velocity of the ball 0.20 seconds after she threw it? (Do not
25. physics

Kevin tosses a 0.10 kg ball horizontally with an initial velocity of 22.00 m/s. What is in m/s2 the vertical component of the acceleration of the ball 3.82 seconds after he threw it?
26. physics

A 10 kg cart was observed moving north with a speed of 15 m/s before it collided with an identical cart moving south at 10 m/s. The collision was observed to cause the carts to couple and move together as one. What is in kg m/s the combined momentum of
27. physics

A 10 kg cart was observed moving north with a speed of 15 m/s before it collided with an identical cart at rest. The collision was observed to cause the carts to couple and move together as one. What is in Joules the kinetic energy of the system of both
28. Physics

It takes 7.9 J of work to stretch a spring 4.6 cm from its unstressed length. How much (in J) spring potential energy is then stored by the spring?
29. physics

A 23.1 kg block is dragged over a rough, horizontal surface by a constant force of 95.0 N acting at an angle of angle 29.3 ° above the horizontal. The block is displaced 5.50 m, and the coefficient of kinetic friction is 0.341. Find the magnitude of the
30. physics

A block of mass M=1.0 kg is dragged over a horizontal surface by a force F=20.0N. The block is displaced a distance d=10.0 m, the friction force Ff is 5.0 N. What is the work done by the weight Fg?
31. physics

A 3.56 x 10-5 kg raindrop falls vertically at constant speed under the influence of gravity and air resistance. After the drop has fallen 83.8 m, what is the work done by gravity? Answer in units of milliJoule (a thousandth of a Joule) and use 9.8 m/s2 for
32. Physics

A block of mass M=1.0 kg is dragged over a horizontal surface by a force F=20.0N. The block is displaced a distance d=10.0 m, the friction force Ff is 5.0 N. What is the work done by the weight Fg?
33. Physics

A 46.0 kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.85 m/s in 1.07 s. It travels with this constant speed for the next 6.80 s. The elevator then slows down (undergoes a uniform
34. Physics

A 44.0 kg man stands on a bathroom scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.90 m/s in 1.19 s. It travels with this constant speed in the upward direction for the next 7.60 s. The elevator then slows
35. Physics

A raindrop of mass 61.60 mg (that is milli- gram) falls in quiet air (no wind). Due to the air resistance force, the drop has a maximum velocity called the terminal velocity of magnitude, 11.00 m/s, which is reached high above ground. What would be in N
36. Physics

When out in space in International Space Station (ISS), Astronauts experience weightlessness. The ISS’s orbit is 354 km (that is 3.54 x 105 m) above the surface of the earth. The distance separating the center of the earth from the center of the ISS is
37. phsics

A student of weight 830 N was sent to another planet called Nerdland. If Nerdland has a mass that is three times the mass of the earth and a radius that is half the radius of the earth, what would be the mass in kg of the student when on Nerdland?
38. physics

A jogger runs in a straight line with an average velocity of v1=10.2 m/s for t1=6.0 min, and then with an average velocity of v2=7.7 m/s for t2=3.0 min. What is her total displacement? Answer in units of m.
39. physics

A jogger runs in a straight line with an average velocity of v1=6.6 m/s for t1=6.0 min, and then with an average velocity of v2=5 m/s for t2=3.0 min. What is her average velocity during this time? Answer in units of m/s.
40. geometry

if the width and height of the original 4in by 6in photograph is increased by a factor of 5,what are the dimensions of the enlargements?
41. math

Draw a segment 1 cm long Draw a segment 1 in long
42. math

1 meter^3 = _________centimeters^2 1 kilometer^2 = __________ meters^2
43. math

1 meter^3 = _________centimeters^2 1 kilometer^2 = __________ meters^2
44. math

1 meter^3 = _________centimeters^2 1 kilometer^2 = __________ meters^2
45. math

1 meter^3 = ________ centimeters^3
46. math

1 meter^3 = ________ centimeters^3
47. math

Two liters of water has a volume of ______ cubic centimeters and a mass of _______ kilograms.
48. math

A gallon of gasoline is more than _______ liters but a little less than ______ liters.
49. math

A two-liter bottle of soda is a little more than 2 _____ or 1/2 of a ____.
50. math

Two liters of water has a volume of __________ cubic centimeters and a mass of ________ kilograms.
51. Algebra

I am helping my daughter with her algebra and we came across a symbol neither of us has seen before. She is solving two sided equations. For this problem, I do see it set up in the book, but it is related to geometry, which they have not covered. She says
52. history

how does the caribbeans geography affect their economy?
53. Chemistry

For each definition, find a corresponding term from the following list: alkane,alkene, alkyne, alcohol, ether, aldehyde, ketone, carboxylic acid, ester, amine, fuctional group, isomers. a. Organic compounds with identical molecular formulas that differ in
54. Chemistry

For each definition, find a corresponding term from the following list: alkane,alkene, alkyne, alcohol, ether, aldehyde, ketone, carboxylic acid, ester, amine, fuctional group, isomers. a. Organic compounds with identical molecular formulas that differ in
55. Chemistry

Nonane has a density of 0.79 g/mL. and boils at 151 Celcius. a. What is the condensed structural formula of nonane b. Is it a solid, liquid, or gas at room temperature c. Is it soluable in water d. Will it float on water or sink
56. Chemistry

Write the condensed structural formula for each of the following molecules: a.ethylcyclopropane b. methylcyclohexane c. isopropylcyclopentane
57. Chemistry

The half-life of oxygen -15 is 124 seconds. If a sample of oxygen -15 has an activity of 4000 becquerels, how many minutes will elapse before it reaches an acivity of 500 becquerels
58. Calculus/Physics

A stone is thrown from a cliff top with an upward velocity of 20 m/s. It takes 7 seconds for the stone to hit the ground at the bottom of the cliff. How high is the cliff? I know you use the equation of motion S(t)= (So)+(Vo)t-(1/2)gt^2 S(20)= (So) + 140 -
59. Calculus

Is x^2 - 2x 1 to 1? I keep getting yes every way I try to work it. Book says no. In the end, I get (with x1=1 and x2=-1
60. Physics

A 56.6kg hiker starts at an elevation of 1270m and climbs to the top of a 2660 peak. (I know the answers to B and C, I just have a question on A) A) What is the change in the hikers potential energy? I took PE=mg(h2-h1) and got
61. Calculus

I finished the first question with no problem. It was something like: Find the points at which f(x) [insert three equations for left right and in between here] is discontinuous. At each of these points, is f cont. from the right or the left? As I said, I
62. math

use a vertical motion model to find how long it will take a walnut to reach the ground if it falls from the top of a 55-foot tree?
63. Discrete Math

I have a review problem I am having problems with. This is the problem: Be able to show the function, g(x) is O(f(x)) numerically as we have done in class Use the definition of O-notation to prove that 2x^2+3x+4 is O(x^2) (Do not use the theorem on
64. Sports and Society in Ancient Greece and Rome

OK. I am trying to work on a project and I need help with one or two things. 1. I have come up with an idea, but can't seem to get it to fit in the fields of sports or society in the ancient world. I wanted to do a web page on Actaeon and Artemis, but I
65. PHYSICS

Given: the linear expansion coefficient of glass is 9 x 10^-6 ('C)^-1. An automobile windshield has dimensions of 59 cm by 390 cm. What minimum spacing around the windshield is needed to prevent the windshield from breaking if the temp. changes by 146' F?
66. PHYSICS

The density of gasoline is 730 kg/m^3 at 0'C. One gallon of gasoline occupies .0038 m^3. Gasoline's volume expansion coefficient is .00096'C ^-1. How many kilograms of gasoline are obtained when 9 gallons of gasoline are bought @ 0'C rather than 18"c
67. PHYSICS

The density of gasoline is 730 kg/m^3 at 0'C. One gallon of gasoline occupies .0038 m^3. Gasoline's volume expansion coefficient is .00096'C ^-1. How many kilograms of gasoline are obtained when 9 gallons of gasoline are bought @ 0'C rather than 18"c
68. PHYSICS

Given: the linear expansion coefficient of glass is 9 x 10^-6 ('C)^-1. An automobile windshield has dimensions of 59 cm by 390 cm. What minimum spacing around the windshield is needed to prevent the windshield from breaking if the temp. changes by 146' F?
69. physics

Given: the linear expansion coefficient of glass is 9 x 10^-6 ('C)^-1. An automobile windshield has dimensions of 59 cm by 390 cm. What minimum spacing around the windshield is needed to prevent the windshield from breaking if the temp. changes by 146' F?
70. Calculus

Let me try to ask this question a different way: 4x^2+2x+xy=12 and y(2)=-4 find y(prime)(2) by implicit differentiation. I can differentiate it to 8x+2+y+xy(prime)=0 I don't know what to do with the y(2)=-4 after this point.
71. Calculus

I saw this question asked, but I didn't understand the answer format. My prof doesn't use dx and dy after he has differentated the problem. He just uses (for example) 8x+2+y+xy(prime) The question is this: 4x^2+2x+xy=12 and y(2)=-4 find y(prime)(2) by
72. physics

thanks again to anyone who can possibly help!!!!! i wish i had a book or notes or something about this kind of stuff :( The linear expansion coefficient of glass is 9 x 10^-6 (`C)^-1. An automobile windshield has dimensions of 59 cm by 390 cm. What minimum
73. physics

my teacher wasn't in school and this assignment is due @ 7am!!!!! The density of gasoline is 730 kg per cubic meter. One gallon of gasoline occupies .0038 cubic meters. Gasoline's volume expansion coefficient is .00096` C (^-1). How many extra kilograms of
74. physics

When a lead bullet hits a solid target at high speed, its entire kinetic energy is converted into heat. For simplicity, assume that all the heat is concentrated in the bullet rather than the target. If the bullet's initial temp. is 20` C, how fast should
75. physics

how much heat is required to vaporize 7 grams of ice initially at 0 degrees celsius when the latent fusion of ice is 80 cal/g, the vaporization of water is 540 cal/g, and the specific heat of water is 1 cal/(g x C)?
76. Pre-Algebra

How do I find a linear relationship in a table? I really need help on this. And this is at a 7th grade level...
77. Physics-check

can you check my answers? 2.is more work required to bring a fully loaded truck up to a given speed, than the same truck lightly loaded? defend your answer? -more work is required to bring a fully loaded truck up to a given speed because it is doing more
78. ap physics

can you check my answers? 2.is more work required to bring a fully loaded truck up to a given speed, than the same truck lightly loaded? defend your answer? -more work is required to bring a fully loaded truck up to a given speed because it is doing more