Physics - November 2007

1) what is its horizontal velocity?

2) At what times did it reach the highest point?

3) What was its max altitude?

4) What was its vertical component?

2007-11-10 05:19:58 · 2 answers · asked by Anonymous

But when new matter is "created" *Yes it can be if I am correct, because when we create antimatter we would have to create matter.* Does it just instantly have gravity, or is it possible that the gravity takes TIME to reach out?

If so, what if it's possible that "gravity" is faster than light? So fast we could not measure it?

2007-11-10 05:18:37 · 5 answers · asked by ghilliemarine 2

how far away must the receiver be to catch the ball?

2007-11-10 05:18:18 · 3 answers · asked by Anonymous

2007-11-10 04:41:15 · 4 answers · asked by kadmonzohar 3

2007-11-10 04:40:32 · 9 answers · asked by Ken 1

Could there be such thing theoretically as a dark matter black hole?

If so, could we use it to travel through it to another point in space or to another universe, or go foreward and backwards in time?

2007-11-10 04:35:24 · 1 answers · asked by Anonymous

Also if that is possible ,could a ship cut down transit time by alternating between FTL and STL drives? I propose by alternating between these it would essentially negate time in transit.

2007-11-10 04:10:05 · 7 answers · asked by military supporter 7

What is Laser radiation that is given out from pen lasers? and what can it do to you? is it dangerouse?

2007-11-10 03:23:35 · 3 answers · asked by Larry 2

u=[5,6,7,8,9,10,11,12,13,14,15,16,17]
y=[0,0.8,1.5,2.1,2.9,3.6,4.3,5.0,5.8,6.5,7.3,8.1,8.8]

Determine the linear equation that best fit the measured data using the least squares method.

2007-11-10 02:33:24 · 1 answers · asked by ozi 1

A uniform steel beam of length L and mass m1 is attached via a hinge to the side of a building. The beam is supported by a steel cable attached to the end of the beam at an angle theta, as shown. Through the hinge, the wall exerts an unknown force, F, on the beam. A workman of mass m2 sits eating lunch a distance d from the building.
http://session.masteringphysics.com/problemAsset/1011053/22/MTS_st_3.jpg

a) Find T, the tension in the cable. Remember to account for all the forces in the problem.

b) Find Fx, the x-component of the force exerted by the wall on the beam ( F), using the axis shown. Remember to pay attention to the direction that the wall exerts the force.

c) Find Fy, the y-component of force that the wall exerts on the beam ( F), using the axis shown. Remember to pay attention to the direction that the wall exerts the force.

2007-11-10 02:06:08 · 2 answers · asked by zoro-kun 2

2007-11-10 00:59:01 · 14 answers · asked by mb 1

2007-11-10 00:06:01 · 4 answers · asked by Jill 2

A black hole is a collapsed star. The gravity of a black hole is so strong that not even light can escape from within its surface or "event horizon". Even outside that surface, enormous energies are needed to escape. Suppose that you are 10 km away from the centre of a black hole (m=10 kg). if your mass is 70 kg, how much do you weigh?

Show calculation!

2007-11-09 23:59:11 · 2 answers · asked by Anonymous

2007-11-09 20:50:18 · 3 answers · asked by ara_sweetipie 1

2007-11-09 18:52:24 · 4 answers · asked by aryan e 1

A horizontal metallic rod is rotating about a vertical axis through the middle of the rod. The length of the rod is L= 1.2 m, the density rho = 6.9 g/cm3, and the ultimate strength of the metal is Su = 4x10 8 N/m 2. Calculate the maximum angular speed the rod can withstand before breaking (in rad/s).

2007-11-09 18:33:19 · 1 answers · asked by Talal B 1

What is the formula for velocity as a function of time when an object is subject to constant acceleration?

2007-11-09 17:20:03 · 10 answers · asked by Anonymous

2007-11-09 16:53:43 · 16 answers · asked by Yahhha 1

Blood can carry excess energy from the interior to the surface of the body, where the energy is dispersed in a number of ways. While a person is exercising, 0.7 kg of blood flows to the surface of the body and releases 2400 J of energy. The blood arriving at the surface has the temperature of the body interior, 37.0°C. Assuming that blood has the same specific heat capacity as water, determine the temperature of the blood that leaves the surface and returns to the interior.

2007-11-09 15:23:28 · 1 answers · asked by Anonymous

2007-11-09 14:24:27 · 3 answers · asked by daniel d 1

This question troubled Newton for many years. A little mass, "m," is a certain distance from the center of a globular cluster of masses and there is a certain force of gravity, due to the cluster of masses, on the little mass that pulls it toward the center of the cluster. Now consider the situation whereby neither the little mass nor the center of the cluster moves, but the cluster uniformly expands. As a result of this expansion some parts of the globular cluster are closer to "m" and some are farther from "m." After the expansion, the forces of gravity of the cluster on the little mass "m" will:

a) increase
b) decrease
c) remain unchanged

2007-11-09 13:34:51 · 5 answers · asked by ? 6

A 50 kg trunk is pushed 6.6 m at constant speed up a 30° incline by a constant horizontal force. The coefficient of kinetic friction between the trunk and the incline is 0.22. a)Calculate the work done by the applied horizontal force. b)suppose the 50 kg trunk is pushed 6.6 m at constant speed up a 30° incline by a force along the plane. The coefficient of kinetic friction between the trunk and the incline is 0.22. Calculate the work done by the applied force. c)How much energy was dissipated by the frictional force acting on the trunk?

2007-11-09 13:30:40 · 1 answers · asked by wonderwoman 1

ok, here's my physics problem, I have to do an assignment that involves finding resultant displacement, average velocity and average speed. There is one question where I have to solve BOTH algebraically and graphically.

The problem is, I'm not getting the same answer. I know that it's ok to be a bit off since the measurements for the graphical solution might not be exact, but I am way off. The two answers are completely different.

In the question, the given information is:
[delta] d1 = 125.75 m, 35 [degrees] E of N taking 14.50 secs
[delta] d2 = 345.0 m, 65 [degrees] W of S taking 55.35 secs

For my algebraic solution, my resultant displacement was 244.33 m (I'm not sure which angle I should calculate, so please help!)

For my graphical solution, my resultant displacement was 230 m (again, I dont know the angle and direction).

I'm thinking that my graphical solution is wrong because my triangle looks pretty bad. Any help in finding the resultant displacement would be nice and thx!!

2007-11-09 13:27:24 · 3 answers · asked by Kouji F 1

2007-11-09 11:45:15 · 4 answers · asked by mrivera61 1

The larger the object the more the distance between the two magnets. I'm looking for a substance or a mass, aside from distance.

2007-11-09 11:22:49 · 5 answers · asked by Aaron M 2

A 20 g ball is fired horizontally with initial speed v0 toward a 95 g ball that is hanging motionless from a 1.4 m long string. The balls undergo a head-on, perfectly elastic collision, after which the 95 g ball swings out to a maximum angle max = 50°. What was v0?

2007-11-09 11:20:03 · 2 answers · asked by Anonymous

A wire carries a current of 5.8 A. How many electrons per second are passing any cross sectional area of the wire? Enter your answer in the format *.**E**. (electrons per second)

2007-11-09 10:58:17 · 2 answers · asked by ariddlegirl 1

A puck has a mass of 0.260 kg. Its original distance from the center of rotation is 40.0 cm, and it moves with a speed of 80.0 cm/s. The string is pulled downward 15.0 cm through the hole in the frictionless table. Determine the work done on the puck. (Hint: Consider the change of kinetic energy of the puck.)

2007-11-09 10:35:10 · 1 answers · asked by ? 1

A 270 N sphere 0.20 m in radius rolls, without slipping 6.0 m down a ramp that is inclined at 37° with the horizontal. What is the angular speed of the sphere at the bottom of the hill if it starts from rest?

2007-11-09 10:34:20 · 1 answers · asked by ? 1

Any help would be appreciated!!

In attempting to pass the puck to a teammate, a hockey player gives it an initial speed of 2.0 m/s. However, this speed is inadequate to compensate for the kinetic friction between the puck and the ice. As a result, the puck travels only one-half the distance between the players before sliding to a halt. What minimum initial speed should the puck have been given so that it reached the teammate, assuming that the same force of kinetic friction acted on the puck everywhere between the two players?

Thanks!

2007-11-09 10:26:09 · 1 answers · asked by frosty 2