# Homework Help: I lost my calculaor Plz calculate this for me

1. Oct 18, 2007

### rocomath

I lost my calculaor :( Plz calculate this for me!!!

$$\alpha=53.0^{o}$$

$$g=9.81\frac{m}{s^{2}}$$

$$x=40.0m$$

$$y=- 15.0m$$

$$v_{0}=\frac{x}{cos{\alpha}}\sqrt{\frac{g}{x\tan{\alpha}-y}}$$

thanks!!!

Last edited: Oct 18, 2007
2. Oct 18, 2007

### learningphysics

I get 25.217

3. Oct 18, 2007

### rocomath

thanks appreciate it!!!

4. Oct 18, 2007

### TMM

I got the same thing.

For the record, if you just enter your math into google, it will calculate an answer. It knows various constants as well, such as c, G, h, etc.

5. Oct 18, 2007

### rocomath

example?

i just typed in, 90 times g and got 90 grams

6. Oct 18, 2007

### J77

No calculator -- what are you posting on?

7. Oct 18, 2007

### Staff: Mentor

Google has a built in calculator that you can use in a pinch. Not to mention your PC, as J77 implies. (Look into the spreadsheets.)

(I guess I just repeated what TMM already told you. D'oh!)

Last edited: Oct 18, 2007
8. Oct 18, 2007

### stewartcs

If you use Excel make sure the angle is in radians and not degrees. VBA expects radians.

9. Oct 18, 2007

### TMM

You need to capitalize constants that are normally capitalized, especially when they share letters with units. I don't think it knows g for this reason, since G is the gravitational constant and g is grams.

10. Oct 18, 2007

### faoltaem

if you have a pc go through the start menu -> programs -> accessories -> calculator
select view -> scientific for more options
if you have a mac there should just be a pic of a calculator on the desktop

11. Oct 18, 2007

### learningphysics

12. Oct 18, 2007

### Staff: Mentor

Me neither. Cool!

13. Oct 18, 2007

### stewartcs

14. Oct 18, 2007

### rocomath

good news! i got my calc back today, lol. someone took it by accident, but i spent like 165 on the TI-89 today so ima have to return it and buy it later for cheaper. that calculator is freakn awesome tho ... i was like putting the craziest and longest integrals and seeing if it could solve it, lol. amazing.

anyways, thanks for all the input. if i find myself w/o a calculator again i'll use google and my windows-calc.