# cr

Popular questions and responses by cr
1. ## Physics

A string under a tension of 48 N is used to whirl a rock in a horizontal circle of radius 2.4 m at a speed of 18.48 m/s. The string is pulled in, and the speed of the rock increases. When the string is 1.076 m long and the speed of the rock is 49.4 m/s,

The index of refraction of a transparent liquid (similar to water but with a different index of refraction) is 1.39. A flashlight held under the transparent liquid shines out of the transparent liquid in a swimming pool. This beam of light exiting the

4. ## Physics

Two blocks are arranged at the ends of a massless string as shown in the figure. The system starts from rest. When the 3.21 kg mass has fallen through 0.4 m, its downward speed is 1.27 m/s. The acceleration of gravity is 9.8 m/s2 . 3.21 kg (box hanging

5. ## Physics pls help

An electron is accelerated by a 6.4 kV potential difference. The charge on an electron is 1.60218 × 10^−19 C and its mass is 9.10939 × 10^−31 kg. How strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.1

6. ## Physics ~ missed this lecture pls help!

The index of refraction of a transparent liquid (similar to water but with a different index of refraction) is 1.39. A flashlight held under the transparent liquid shines out of the transparent liquid in a swimming pool. This beam of light exiting the

7. ## Physics

A Boeing 747 "Jumbo Jet" has a length of 59.7m. The runway on which the plane lands intersects another runway. The width of the intersection is 25.0m. The plane decelerates through the intersection at a rate of 5.7 m/s(squared) and clears it with a final

8. ## Physics -work shown

A heavy conductor (mass m, length `, resistance R) is suspended by two springs each with spring constant k, and connected to a battery with electric potential V as shown in the figure. A magnetic field ~B is now imposed. The acceleration of gravity is 9.8

9. ## Physics

a VW beetle goes from 0-60miles/hour with an acceleration of 2.35m/s(squared). How much time does it take for the Beetle to reach this speed. Here's what I have 60 miles = 96560.64m.

10. ## Physics ~work shown pls help!

An electron is accelerated by a 6.4 kV potential difference. The charge on an electron is 1.60218 × 10^−19 C and its mass is 9.10939 × 10^−31 kg. How strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.1

11. ## Physics with work, pls help

A proton is moving in a circular orbit of radius 11.8 cm in a uniform magnetic field of magnitude 0.232 T directed perpendicular to the velocity of the proton. Find the orbital speed of the proton. Answer in units of m/s. I came up with .118/2.83x10^-7 and

12. ## Statistics

3) A company that manufactures oil seals found the population mean to be 49.15 mm (1.935 in.), the population standard deviation to be 0.51 mm (0.020 in.), and the data to be normally distributed. If the internal diameter of the seal is below the lower

13. ## Physic ~ pls help

A heavy conductor (mass m, length `, resistance R) is suspended by two springs each with spring constant k, and connected to a battery with electric potential V as shown in the figure. A magnetic field ~B is now imposed. The acceleration of gravity is 9.8

14. ## Physics ~ work shown, pls help!

A proton is moving in a circular orbit of radius 11.8 cm in a uniform magnetic field of magnitude 0.232 T directed perpendicular to the velocity of the proton. Find the orbital speed of the proton. Answer in units of m/s. I came up with .118/2.83x10^-7 and

15. ## Physics *work shown ~ pls help!

An electron is accelerated by a 6.4 kV potential difference. The charge on an electron is 1.60218 × 10^−19 C and its mass is 9.10939 × 10^−31 kg. How strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.1

16. ## chemistry

For the reaction 2Na(s) + Cl(g) ¨2NaCl(s), how many grams of NaCl could be produced from 103.0 g of Na and 13.0 L of Cl (at STP)?

17. ## History

Why would an emperor or a wealthy citizen hold gladiatorial games? What was the Roman idea of citizenship? How did citizenship differ for women and men?

18. ## Math

What is the additive inverse of f(x)=(x-2)^2?

19. ## Physic

CFL light bulbs consume less power than their incandescent counterparts while providing about the same amount of light. Suppose a CFL, while consuming only 20 Watts of power produces as much light as a 60 Watt incandescent bulb. Also, suppose a house has 8

20. ## math

the pizza was cut into 10 slices two people ate 4/5 of it they did not eat the same amount how many slices might each have eaten?

An object is p = 34.3 cm in front of a concave mirror. Its real image height is 6 times larger than the object height. What is the location of the image? Answer in units of cm. What is the radius of curvature of the mirror? Answer in units of cm.

22. ## Physics ~ missed this lecture pls help

An object is p = 34.3 cm in front of a concave mirror. Its real image height is 6 times larger than the object height. What is the location of the image? Answer in units of cm. What is the radius of curvature of the mirror? Answer in units of cm.

23. ## Physics ~ missed this lecture pls help

A thin converging lens of focal length 9.82 cm forms an image of an object placed 18.5 cm from the lens. Find the image distance. Answer in units of cm. What is the magnification for an object distance of 18.5 cm? Find the location of the image for an

24. ## Physics - pls help

A heavy conductor (mass m, length `, resistance R) is suspended by two springs each with spring constant k, and connected to a battery with electric potential V as shown in the figure. A magnetic field ~B is now imposed. The acceleration of gravity is 9.8

25. ## Physics pls help

A proton is moving in a circular orbit of radius 11.8 cm in a uniform magnetic field of magnitude 0.232 T directed perpendicular to the velocity of the proton. Find the orbital speed of the proton. Answer in units of m/s. I came up with .118/2.83x10^-7 and

26. ## Physics- Pls help~review for test!

A 10.0 kg box is pulled along a horizontal surface by a 40N force which is applied at a 30.0 degree angle. If uk = 0.3, calculate the acceleration of the box.

27. ## Physics * (Wht am I doing wrng? answ provided)

A 6 kg block slides on a horizontal frictionless surface with a speed of 1.5 m/s . It is brought momentarily to rest when it hits a bumper that compresses a spring. The acceleration of gravity is 9.8 m/s2 .How much is the spring compressed if its force

28. ## Physics

Please help ~ Two blocks are arranged at the ends of a massless string as 3.21 kg (box hanging from table) 4.96 kg (box on table). The system starts from rest. When the 3.21 kg mass has fallen through 0.4 m, its downward speed is 1.27 m/s. The acceleration

29. ## Physics

In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.31 × 106 m/s.Find the central force acting on the electron as it revolves in a circular orbit of radius 4.95 × 10−11 m. Answer in units of N. Find the centripetal

30. ## Physics

In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.31 × 106 m/s.Find the central force acting on the electron as it revolves in a circular orbit of radius 4.95 × 10−11 m. Answer in units of N. Find the centripetal

1. ## E.L.A

posted on May 10, 2019
2. ## Math

1 2/7 degrees farenheit

posted on May 8, 2019
3. ## History

shut up ms sue you faker

posted on April 26, 2019

bbaca

posted on April 26, 2019
5. ## to ms.sue

ms sue is a fake when someone asks a question she re asks it and then answers it so dont fall for phonies like her

posted on April 25, 2019
6. ## Math

166.14

posted on August 29, 2016
7. ## algebra

15

posted on May 10, 2016
8. ## math

126 (neither Bio. nor Spanish) +52 (Spanish) ___ 178 (total of students that can't be chosen) 200 (total students) -178 (total it can't be chosen) ____ 22 22/200 = 11/100 = 11% This is not the only way to solve it.

posted on April 22, 2013
9. ## science: chemistry

Use PV=nRT P is pressure in atm V is what you are looking for n is number of moles (1.5 mol) R is a constant( .08206) And T is temperature in Kelvin (22+273) PLUG AND CHUG

posted on July 14, 2011
10. ## Physics ~ missed this lecture pls help

Got it ~ thanks!

posted on April 28, 2011
11. ## Physics ~ missed this lecture pls help

I was able to get distance but both my magnifications were incorrect. pls help

posted on April 28, 2011
12. ## Physics ~ missed this lecture pls help

The first answer is 20.93, then when I take that and divide it by 18.5 equals 1.13 but that is incorrect. What am I doing wrong? Then using the same formula (1/9.82)- (1/4.06) comes out -6.92 which doesn't seem right either. please help.

posted on April 28, 2011
13. ## Physics -work shown

Thank you so much! I am struggling through this class. The professor is so intellegent that he doesn't bring it down to the basics for understanding.

posted on April 15, 2011
14. ## Physics ~work shown pls help!

According to my homework this is incorrect too. What could be wrong.

posted on April 15, 2011
15. ## Physic ~ pls help

I selected #1 AND IT WAS INCORRECT. I guess I just don't understand...

posted on April 15, 2011
16. ## Physics *work shown ~ pls help!

What answer do you get when you calculate? Am I doing something wrong in my calculations?

posted on April 15, 2011
17. ## Physics ~ work shown, pls help!

Calculating your v gave me 2.62285030e-48 so I then divide .118/ans and get 4.4989e46 would this be right?

posted on April 15, 2011
18. ## Physics - pls help

---------- + - ------- | V | | | Spring K Spring K | | | | Heavy Conductor R | mg Hope this helps! Please help.

posted on April 14, 2011
19. ## Physics pls help

posted on April 14, 2011
20. ## Physics pls help

What am I doing wrong? Sqrt (9.10939x10^-31)x(2)x(6400)/(1.60218x10^-19)sqrd =673966.5256 ans * (1/.051) = 13215029.91 Wrong answer. I have entered four wrong answers. I can not enter another wrong answer and pass this homework. pls help!

posted on April 14, 2011
21. ## Physics * (Wht am I doing wrng? answ provided)

Thank you!

posted on March 11, 2011
22. ## Physics

60 M/H = 26.82 m/s. t=v/a=_____

posted on February 21, 2011
23. ## Physics

2.31 × 10>6 m/s (should be 10 to the 6 power) and 4.95 × 10>−11 m (should be 10 to the -11 power) answer 1.0780e23 was incorrect. Need in N.

posted on February 20, 2011
24. ## Child care

i would think its all

posted on November 18, 2009