AnonymousQuestionerAnswerer

I was under my parents health insurance for a long time. Now that my parents are about to lose their jobs, I don't know what will happen to my coverage. I currently work as a contract worker so I do not gain any benefits. What should I do now?

Okay I know I should see my doctor but I'm busy right now so I'm hoping someone who's a professional can help me. So here's what happened. 10 days ago i put on my new pair of contacts and I was fine with them until 5 days ago when my eye got red after wearing them and stayed that way for a while. I took the weekend off from my contacts and eye returned to normal again, no redness. I put my contacts on yesterday and it happened again. The thing that bothers me is why does it still stay red after I take them off and have a little irritability?

how do u do the integration of y=√x, y=0, x=1; about x=-1

A electron moving along the x axis has a position given by x = 14t e^(-1.3t) m, where t is in seconds. How far is the electron from the origin when it momentarily stops?

i know i have to use the product rule...now im lost...please help

In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of +5.0 m/s, grabs him. The tackler holds onto the receiver, and the two move off together with a velocity of +3.7 m/s. The mass of the tackler is 125 kg. Assuming that momentum is conserved, find the mass of the receiver.

A 1055 kg van, stopped at a traffic light, is hit directly in the rear by a 670 kg car traveling with a velocity of +1.95 m/s. Assume that the transmission of the van is in neutral, the brakes are not being applied, and the collision is elastic. What is the final velocity of each vehicle?

A projectile (mass = 0.27 kg) is fired at and embeds itself in a target (mass = 2.09 kg). The target (with the projectile in it) flies off after being struck. What percentage of the projectile's incident kinetic energy does the target (with the projectile in it) carry off after being struck?

Kevin has a mass of 92.0 kg and is skating with in-line skates. He sees his 20.50 kg younger brother up ahead standing on the sidewalk, with his back turned. Coming up from behind, he grabs his brother and rolls off at a speed of 2.45 m/s. Ignoring friction, find Kevin's speed just before he grabbed his brother.

A 55 kg swimmer is standing on a stationary 230 kg floating raft. The swimmer then runs off the raft horizontally with a velocity of +4.9 m/s relative to the shore. Find the recoil velocity that the raft would have if there were no friction and resistance due to the water.

For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air. Because of the air jets, the friction impeding the horizontal motion of the platform is negligible. Each time the heart beats, blood is pushed out of the heart in a direction that is nearly parallel to the platform. Since momentum must be conserved, the body and the platform recoil, and this recoil can be detected to provide information about the heart. For each beat, suppose that 0.050 kg of blood is pushed out of the heart with a velocity of +0.30 m/s and that the mass of the patient and the platform is 85 kg. Assuming that the patient does not slip with respect to the platform, and that the patient and the platform start from rest, determine the recoil velocity.

A 44 kg skater is standing still in front of a wall. By pushing against the wall she propels herself backward with a velocity of -1.9 m/s. Her hands are in contact with the wall for 0.80 s. Ignore friction and wind resistance. Find the magnitude and direction of the average force she exerts on the wall (which has the same magnitude, but opposite direction, as the force that the wall applies to her).

direction answer possibilities:

1)opposite velocity of skater

2)same direction of velocity of skater

3)upward

4)not enough information to tell

A projectile of mass 1.250 kg is shot straight up with an initial speed of 12.0 m/s.

(a) How high would it go if there were no air friction?

(b) If the projectile rises to a maximum height of only 4.4 m, determine the magnitude of the average force due to air resistance.

A gymnast is swinging on a high bar. The distance between his waist and the bar is 1.2 m, as the drawing shows. At the top of the swing his speed is momentarily zero. Ignoring friction and treating the gymnast as if all his mass is located at his waist, find his speed at the bottom of the swing.

You are trying to lose weight by working out on a rowing machine. Each time you pull the rowing bar (which simulates the "oars") toward you, it moves a distance of 1.1 m in a time of 1.9 s. The readout on the display indicates that the average power you are producing is 82 W. What is the magnitude of the force that you exert on the handle?

One of the new events in the 2002 Winter Olympics was the sport of skeleton. Starting at the top of a steep, icy track, a rider jumps onto a sled (known as a skeleton) and proceeds-belly down and head first-to slide down the track. The track has fifteen turns and drops 104 m in elevation from top to bottom.

(a) In the absence of nonconservative forces, such as friction and air resistance, what would be the speed of a rider at the bottom of a track with a 101 m drop in elevation? Assume that the speed of the rider at the beginning of the run is relatively small and can be ignored.

(b) In reality, the best riders reach the bottom of a 104 m drop with a speed of 35.8 m/s (about 80 mi/h). How much work is done on an 80.8 kg rider and skeleton by nonconservative forces?

A 47.0 g golf ball is driven from the tee with an initial speed of 50.0 m/s and rises to a height of 26.0 m.

(a) Neglect air resistance and determine the kinetic energy of the ball at its highest point.

(b) What is its speed when it is 7.0 m below its highest point?

The skateboarder in the drawing starts down the left side of the ramp with an initial speed of 5.4 m/s. If nonconservative forces, such as kinetic friction and air resistance, are negligible, what would be the height h of the highest point reached by the skateboarder on the right side of the ramp?

A model rocket is fired vertically upward from rest. Its acceleration for the first three seconds is a(t) = 60t, at which time the fuel is exhausted and it becomes a freely "falling" body. 14 seconds later, the rocket's parachute opens, and the (downward) velocity slows linearly to -18ft/s in 5 s. The rocket then "floats" to the ground at that rate.

(a)Determine the position function "s" and the velocity function "v" (for all times "t"). Sketch the graphs of "s" and "v".

(b)At what time does the rocket reach its maximum height, and what is that height?

(c)At what time does the rocket land?

f''(t)=2e^t + 3 sin t, f(0) = 0, f(Pi) = 0

help please

(2+x^2)/(1+x^2)

i know the denominator anti-derivative is tan^-1 x

how do i get to this?