Physics - October 2007

i live in georgia

2007-10-24 10:02:12 · 2 answers · asked by Tanesha S 1

An open cylindrical container made from sheet metal of uniform thickness has a mass of
800 g. When completely filled with water the total mass is 15.6 kg.

What would be the total mass of a cylindrical container full of water made from the same sheet metal (of the same thickness) but with double the diameter and double the height?

A 118.4 kg
B 121.6 kg
C 124.8 kg
D 128 kg
E 131.2 kg

Please provide working... i did 15.6/0.8 to get 19.5 but then i get stuck.. any help would be greatly appreciated!

Thanks, Ellie x

2007-10-24 09:32:18 · 3 answers · asked by lil_els2000 4

i have no idea. please help!!

2007-10-24 09:29:40 · 3 answers · asked by smarty 2

What is the distance from the Earth's center to a point outside the Earth where the gravitational acceleration due to the Earth is 1/34 of its value at the Earth's surface?

2007-10-24 09:17:23 · 2 answers · asked by matt c 1

Just like light should not even alter its wave length because, hey, its the almighty light.

2007-10-24 09:09:22 · 2 answers · asked by spencer 2

I already know that you wrap wire around a nail and close the circuit with a battery. My question is what voltage battery do you use and what gauge wire? I need numbers!

Thanks,

2007-10-24 09:04:48 · 4 answers · asked by Anonymous

A 5.32 kg ball hits the floor and bounces back up. Just before it hits the floor its velocity is v=9.97 m/s in the vertical direction.
What is the maximum height the ball can rebound to?

2007-10-24 08:25:32 · 1 answers · asked by Anonymous

Ricardo, of mass 81 kg, and Carmelita, who is lighter, are enjoying Lake Merced at dusk in a 29 kg canoe. When the canoe is at rest in the placid water, they exchange seats, which are 2.6 m apart and symmetrically located with respect to the canoe's center. Ricardo notices that the canoe moves 46.5 cm horizontally relative to a pier post during the exchange and calculates Carmelita's mass. What is it?

2007-10-24 07:36:51 · 4 answers · asked by Anonymous

2007-10-24 07:05:34 · 3 answers · asked by Anonymous

Tossing Your Lunch. Henrietta is going off to her physics class, jogging down the sidewalk at a speed of v. Her husband Bruce suddenly realizes that she left in such a hurry that she forgot her lunch of bagels, so he runs to the window of their apartment, which is a height h above the street level and directly above the sidewalk, to throw them to her. Bruce throws them horizontally at a time t after Henrietta has passed below the window, and she catches them on the run. You can ignore air resistance.

With what initial speed must Bruce throw the bagels so Henrietta can catch them just before they hit the ground?
Take free fall acceleration to be g.

Where is Henrietta when she catches the bagels?
Take free fall acceleration to be g.

i know how to do it when there is actual values, but in this case it is all symbolic so im struggling to achieve correct answer.

Best i could do is: V(t+sqrt2h/g) all divided by t

wrong tho, help please, if someone could explain the method needed

2007-10-24 06:48:59 · 2 answers · asked by Anonymous

If so where would the reaction occur at??(Newton's third law) action has equal opposite reaction, if we (what we do) is the action where could we find the reaction

2007-10-24 06:30:02 · 2 answers · asked by Anonymous

(1) 0.0m/s (2) 1.6m/s (3) 4.9m/s (4) 9.8m/s

2007-10-24 06:29:58 · 2 answers · asked by Azeez A 1

Need help with this physics problem. How do you go about figuring it out?

2007-10-24 06:24:20 · 2 answers · asked by Michelle W 1

I have a great deal of experimental data; it all roughly fits a sine wave. I have been working out the period manually by identifying the peaks and troughs, on an Excel graph; it takes ages... Is there a function, or Data Analysis tool which is able to calculate the period? (The amplitude get small exponentially as well). If not could I make a macro that does the same thing?

Help! Thank you!

2007-10-24 06:15:24 · 3 answers · asked by Anonymous

A jungle veterinarian with a blow-gun loaded with a tranquilizer dart and a sly 1.5-kg monkey are each a height h above the ground in trees a distance L apart. Just as the hunter shoots horizontally at the monkey, the monkey drops from the tree in a vain attempt to escape being hit.

What must the minimum muzzle velocity of the dart have been for the hunter to hit the monkey before it reached the ground?
Take free fall acceleration to be g.

cant find the answer for the life of me.

2007-10-24 06:15:18 · 6 answers · asked by Anonymous

I need help badly !!!

Here's a picture of the figure/question

http://edugen.wiley.com/edugen/courses/crs1650/art/qb/qu/c10/fig10_42.gif

In Fig. 10-44, a cylinder having a mass of 3.2 kg can rotate about its central axis through point O. Forces are applied as shown: F1 = 6.2 N, F2 = 3.0 N, F3 = 5.0 N, and F4 = 9.5 N. Also, r = 5.8 cm and R = 16 cm. Taking the clockwise direction to be negative, find the angular acceleration of the cylinder. (During the rotation, the forces maintain their same angles relative to the cylinder.)

I need to get a solution rather than just an answer, i need to learn, thanks to everyone who posts.

-Joe

2007-10-24 06:07:41 · 3 answers · asked by Anonymous

2007-10-24 05:59:59 · 2 answers · asked by Anonymous

2007-10-24 05:59:14 · 4 answers · asked by T-Luv 4

a. The First Law of Thermodynamics

b. The Second Law of Thermodynamics

c. The Law of Non-contradiction

2007-10-24 05:49:27 · 7 answers · asked by Anonymous

Dynamite! A demolition crew uses dynamite to blow an old building apart. Debris from the explosion flies off in all directions, and is later found at distances up to a distance x from the explosion.

Find the maximum speed at which debris was blown outward by the explosion. Neglect air resistance.

2007-10-24 05:49:26 · 4 answers · asked by Anonymous

1- What is the equation for Kinetic Energy and Momentum?

2- What is the difference between an inelastic and elastic collision?

3- What does conservation of momentum mean?

4- A mosquito splats against the windsheild of a car travelling down the interstate at some large but legal velocity. Which has the largest change of momentum from the collision?

- the car
- the mosquito
- the road
- none of the above


Thanks for your help.

2007-10-24 05:47:47 · 4 answers · asked by Anonymous

If i have a metal sphere and I need to calculate the height it must fall from, I know the weight of the sphere, this radius (I have the sphere) air resistance doesn't matter and it will be falling under the earth's gravity (I don't quite have the money to pop into space)

10 points for best answer

2007-10-24 05:45:40 · 2 answers · asked by prof. Jack 3

2007-10-24 05:41:13 · 3 answers · asked by Yahoo! 5

2007-10-24 05:24:15 · 3 answers · asked by ecast4uhm246 1

2007-10-24 05:23:40 · 5 answers · asked by Anonymous

I need to know the steps. I think I am doing it right, but I keep getting the answer wrong. Here's the question...

Objects with masses of 300 kg and a 600 kg are separated by 0.450 m.
(a) Find the net gravitational force exerted by these objects on a 69.0 kg object placed midway between them.

I am using the equation F=Gm1m2/d2, using it for the first object, then subtracting the second object and totally getting the wrong answer. Any help?

2007-10-24 04:19:49 · 3 answers · asked by n'cole 2

The definition of potential at a point is: the work done in briniging a unit positivecharge from infinity to a point in the electric field

When it is well established that positive ions are created due to the loss of electrons and ions do not move then why do we follow the wrong word ?

One possible cause may be that we still follow the conventional method. But if so, why? can't we follow the modern and correct words ?

2007-10-24 03:19:17 · 6 answers · asked by Space Crazy 2

A 60 g ball is tied to the end of a 50-cm-long string and swung in a vertical circle. The center of the circle, as shown in Figure, is 150 cm above the floor. The ball is swung at the minimum speed necessary to make it over the top without the string going slack.

If the string is released at the instant the ball is at the top of the loop, where does the ball hit the ground?

Diagram:
http://i216.photobucket.com/albums/cc75/Aeds17/Untitled-1.jpg

2007-10-24 03:06:48 · 2 answers · asked by Aeds 2

A 1900 kg car experiences a combined force of air resistance and friction that has the same magnitude whether the car goes up or down a hill at 27 m/s. Going up a hill, the car's engine needs to produce 47 horsepower more power to sustain the constant velocity than it does going down the same hill. At what angle is the hill inclined above the horizontal?

2007-10-24 03:05:09 · 1 answers · asked by Ariel 2

A ball is launched up a semicircular chute in such a way that at the top of the chute, just before it goes into free fall, the ball has a centripetal acceleration of magnitude 2g.

How far from the bottom of the chute does the ball land?
Your answer for the distance the ball travels from the end of the chute should contain R.

Diagram: http://i216.photobucket.com/albums/cc75/Aeds17/Untitled.jpg

2007-10-24 02:58:10 · 3 answers · asked by Aeds 2