Physics - December 2007

2007-12-05 10:44:55 · 3 answers · asked by Anonymous

What is 1E15 kg * m^2/s^2 = m * (3E8 m/s)^2 ?

2007-12-05 10:44:42 · 3 answers · asked by Anonymous

http://img452.imageshack.us/img452/8890/vic13p065nx7.png
http://img360.imageshack.us/img360/7627/vqc13p065dz4.png

HOW DO U DO THIS I CANT GET TEH ANSWER PLZZ HELP!

2007-12-05 10:40:50 · 1 answers · asked by achabacha 1

Your teacher tosses a basketball and goes through(lucky shot).

Initial velocity is 18 m/s, the angle is 62 degrees. The hoop is 3.048 m tall and the guy is 2.256 m tall. I already found my max height by using the formula and the max height is 1.62 sec.

I need to know how long it takes to reach the hoop and horizontal length and I'm stuck right now.

Thanks to all who help.

2007-12-05 10:39:00 · 3 answers · asked by Anonymous

then used to heat the house on cloudy days. Suppose that 2.4×10^8 J of heat are needed to maintain the inside of the house at 21°C. how many barrels ( 1 BARREL= 0.16 M^3) OF WATER are needed?

2007-12-05 10:33:45 · 2 answers · asked by iqbalkhanayesha 2

-What is the magnitude of the energy change associated with emission of one mole of photons of light with wavelength of 5.755×1014 Hz


- If it takes 2.0E-1 sec. for one wavelength of a wave to pass a stationary point, what is the frequency of the wave (Hz)


-What is wavelength of an electromagnetic wave the velocity of which is 3.0E+10 cm/sec and the frequency of which is 1.3E+17 Hz? (in cm)


-How much energy (in joules) is contained in one mole of photons (electromagnetic quanta) of frequency 9.0E+17 Hz?


PLEEEEEEEASE help
i have a test tomorrow and i need to know how to work these out
:)

2007-12-05 10:04:45 · 1 answers · asked by thiswasjustforphysics 3

Ok so how do you find the number of excess or deficit electrons on a oil drop( ia lready have q, E, Voltage, and diplacement of the Parallel plates).

Thanks.

2007-12-05 09:50:53 · 2 answers · asked by WWJD? 4

2007-12-05 09:21:06 · 3 answers · asked by aolsuxp 2

An observant fan at a baseball game notices that the radio commentators have lowered a microphone from their booth to just a few inches above the ground, as shown in the figure below. The microphone is used to pick up sound from the field and from the fans. The fan also notices that the microphone is slowly swinging back and forth like a simple pendulum. Using her digital watch, she finds that 10 complete oscillations take 81.0 s. How high above the field is the radio booth?

2007-12-05 08:41:03 · 2 answers · asked by symia87 1

The single cable supporting an unoccupied elevator breaks when the elevator is at rest at the top of a 154 m high building. With what speed does the elevator hit the ground? How long does it take to fall?

2007-12-05 08:36:59 · 2 answers · asked by Lisa 2

The angular position of a point on the rim of a rotating wheel is given by θ = 4.24t - 2.17t2 + 3.51t3, where θ is in radians and t is in seconds. What are the angular velocities at (a) t = 1.09 s and (b) t = 6.17 s? (c) What is the average angular acceleration for the time interval that begins at t = 1.09 s and ends at t = 6.17 s? What are the instantaneous angular accelerations at (d) the beginning and (e) the end of this time interval?

2007-12-05 08:36:35 · 3 answers · asked by shade o 1

how do i make a parachute?
it can't be made out of a bag.
do you have any ideas....
please list websites too.
i can't figure out any other options.

2007-12-05 08:35:50 · 2 answers · asked by Ashley 3

Oh man, I had a test today and I didn't know how to do this, it was a bonus mark because we didn't learn it.

How do you show increasing acceleration (not constant) on a distance-time graph?
Is it curve, if so what kind?

2007-12-05 08:31:52 · 4 answers · asked by funkee_fresh721 2

i have a question asking me to draw a picture of a textbook on a table and label all the forces acting on it, we are on like mass and inertia but i dont understand what other forces would be acting on the book other than gravity

2007-12-05 08:31:22 · 2 answers · asked by molly 1

A car traveled 1.00 hr at 60 km/hr and 0.30 hr at 40 km/hr. What was the car's average speed over the entire trip?

2007-12-05 08:25:04 · 1 answers · asked by Sarah P 1

I know that insulators hold their valence electrons tightly, while conductors hold them loosely. But why? Is it because metals want to lose electrons, so they're held loosely?

2007-12-05 08:18:12 · 4 answers · asked by tobias 2

2007-12-05 08:05:36 · 4 answers · asked by Anonymous

Calculate the number of molecules in m= 29 g of a substance , molar mass M= 63 g/mol. Express your result in scientific notation with 3 sig. fig. i.e. x.yzEw

2007-12-05 08:00:26 · 1 answers · asked by Talal B 1

The proton is at x= -d and the electron is at x= +d. They are released simultaneously. and the only force that affects their motions is the electrostatic force of attraction that each applies to the other. Which particle reaches the origin first? Why?

2007-12-05 07:22:24 · 2 answers · asked by Michaela G 1

With threat effort the scientist finally managed to achieve minimum muzzle velocity necessary to success of his mission.
After nearly missing one satellite the cannon ball landed on the South pole.

How much time did the cannon ball spend in space?
(Assume that radius of the GSS orbit is large compared to radius of Earth)

2007-12-05 07:18:18 · 5 answers · asked by Alexander 6

How are thoughts in your brain composed as matter? Everything is matter, so how do thoughts, memories, insights, and deep thinking fit in with that?

2007-12-05 07:09:19 · 14 answers · asked by Anonymous

http://antiques.about.com/gi/dynamic/offsite.htm?zi=1/XJ/Ya&sdn=antiques&cdn=homegarden&tm=14&gps=101_100_1089_773&f=00&su=p284.8.150.ip_&tt=14&bt=1&bts=1&zu=http%3A//www.glassencyclopedia.com/goldrubyglass.html

2007-12-05 06:48:15 · 3 answers · asked by hwgramm 3

I know.

How can a 400 ton plane stay in the air when physics say everything that goes up must come down. When people fall off a building why does'nt the air support them to fly?

2007-12-05 06:47:19 · 5 answers · asked by grfisgd 6

An object weighs 315 N in air. When tied to a string, connected to a balance, and immersed in water, it weighs 265 N. When it is immersed in oil, it weighs 269 N. Find the following:
1. The density of the oil

2007-12-05 06:24:48 · 1 answers · asked by Saleh N 1

1. An ice cube is placed in a glass of water. The cube is 2.0 cm on each side and has a density of 0.917 g/cm3. What is the magnitude of the buoyant force on the ice?


2. An object weighs 315 N in air. When tied to a string, connected to a balance, and immersed in water, it weighs 265 N. When it is immersed in oil, it weighs 269 N. Find the following:
a)the density of the object
b)the density of the oil

2007-12-05 05:31:50 · 1 answers · asked by Saleh N 1

A cylinder contains 270 L of hydrogen gas (H2 at 0.0°C) and a pressure of 10 atm. How much energy is required to raise the temperature of this gas to 25°C? Units in kJ

2007-12-05 05:20:17 · 1 answers · asked by Anonymous

How much heat is required to raise the body temperature of a 60-kg woman from 21.9°C to 57.3°C? Units in kcal

2007-12-05 05:19:39 · 1 answers · asked by Anonymous

A car, on a straight road, is stopped at a traffic light. When the light turns to green the car accelerates with a constant acceleration. It reaches a speed of 24.7 m/s (88.9 km/h) in a distance of 141 m. Calculate the acceleration of the car.

2007-12-05 05:07:37 · 2 answers · asked by Lisa 2

2007-12-05 05:05:03 · 36 answers · asked by lovellg14 1

(continued)....and the second is 62 N what is the mass of the board???

2007-12-05 04:50:19 · 1 answers · asked by Soni 2