A 4.5 mL syringe has an inner diameter of 6.0 mm , a needle inner diameter of 0.29 mm , and a plunger pad diameter (where you place your finger) of 1.2 cm. A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100. Assume the liquid is an ideal fluid.

A. What is the minimum force the nurse needs to apply to the syringe?

B. The nurse empties the syringe in 5.0 s . What is the flow speed of the medicine through the needle?

A rocket carrying a new 990-kg satellite into orbit misfires and places the satellite in an orbit with an altitude of 120 km, well below its operational altitude in low-Earth orbit.

(a) What would be the height of the satellite's orbit if its total energy were 545 MJ greater?
km

(b) What would be the difference in the system's kinetic energy? (Include the sign of the value in your answer.)
MJ

(c) What would be the difference in the system's potential energy? (Include the sign of the value in your answer.)
MJ

The driver of a 1450 kg car, initially traveling at 10.6 m/s, applies the brakes, bringing the car to rest in a distance of 24.0 m. Find the net work done on the car. Find the magnitude and direction of the force that does this work. (Assume this force is constant.)

A cyclist coasts up a 10.3° slope, traveling 19.0 m along the road to the top of the hill. If the cyclist's initial speed is 9.90 m/s, what is the final speed? Ignore friction and air resistance.

Find the minimum initial height h₁ of the roller coaster in the figure below if the roller coaster is to complete the loop, where h₂ = 24.6 m. Neglect friction.

the specific heat of copper (0.092) and the specific heat of silver is (0.056). The mass of silver is 1.02 times greater than the mass of the copper. The heat gained by the silver is 1.33 times the heat gained by copper. The temperature change of copper is 20 degrees Celsius. What is the temperature change of the silver?

An explosion aboard a stationary spacecraft breaks it into 3 well-defined and identifiable pieces. From a space station you capture a video of the explosion. A 2500-kg piece flies off at 200 m/s in the –x-direction (as seen on the video monitor), a 1500-kg piece moves away at 220 m/s at an angle of 34° above the +x axis. The third piece you know to be 1800 kg but its path cannot be seen on the video. You want to know which way it’s headed in case it moves toward another space station. What is the velocity of this third fragment? Assume all the pieces lie in the same (xy) plane.

Snell's Law and the Law of Reflection explain how light is redirected when it encounters a surface between two media. In the extreme, light may only reflect at a boundary, and go back into the medium it was in. More often, some of it reflects and some goes through. If the boundary is plane and flat, then these laws are easy to interpret. When the boundary is curved, they describe happens at every point on the surface.

One of the classic types of glass is called "crown" glass, which has an index of refraction for visible light of 1.52 and is usually free of significant impurities. It was one of the first glasses discovered, and windows are made from it. Another glass is called "flint" glass, and it has lead oxide added, which makes it heavier, more "dispersive", and increases its index of refraction to 1.62.

1. A ray of light enters a flat surface of crown glass at a 25 degree angle to the surface. At what angles do the reflected and refracted rays leave the surface?

2. As in the first part, but for flint glass, what are the angles?

3. For the flint glass, the refracted ray goes through the glass to the other side. If the glass is a parallel slab, what happens when the ray reaches the opposite side from the inside? At what angle to the surface does it exit the glass back into air?

4. What is the smallest angle to the surface that light can have and still be transmitted from the inside to the outside in the case of flint glass? What angle is the light going at as it leaves in that case?

Hint: The laws of reflection and refraction are usually stated in terms of the angles to the perpendicular or "normal" to the surface. These questions are rephrased in terms of the angles to the surface so take care in interpreting the laws and your answers.

A car with a mass of 1160 kg is traveling in a mountainous area with a constant speed of 73.6 km/h. The road is horizontal and flat at point A, horizontal and curved at points B and C. The radii of curvatures at B and C are: rB = 150 m and rC = 105 m. Calculate the normal force exerted by the road on the car at point Now calculate the normal force exerted by the road on the car at point B. And finally calculate the normal force exerted by the road on the car at point C.

A baseball crosses home plate with a velocity of 89.8 miles per hour, at an angle of 30.0 degrees below horizontal, towards the batter. Shortly after, it has been hit by a baseball bat, and now has velocity 99.6 miles per hour at a "launch angle" of 25.0 degrees above horizontal, away from the batter. The ball has mass 0.145 kg, keeping with the Major League Baseball rulebook. Define "from the batter, towards the pitcher" as positive x, and "up" as positive y. (Note: we are assuming that the ball is hit in the direction of the pitcher, versus to the left or right; otherwise this becomes a 3-dimensional problem.)

A. What is the change in the x-component of the ball's linear momentum? Hint: in order to get the correct value, you must (1) split the initial and final velocities into x and y components, (2) convert miles per hour to meters per second, and (3) be careful about which velocities are negative (look at the definitions in the table above).
kg*m/s

B. What is the change in the y-component of the ball's linear momentum?
kg*m/s

C. What is the magnitude of the total change in the ball's linear momentum?
kg*m/s

1. Answer each with three significant figures.

a. A 4.50 cm tall object is placed at a distance of (16.8) cm from a convex lens with a focal length of (12.25) cm. Find the size of the resulting image. Give your answer in centimeters (cm) with the correct sign.

b. A 4.50 cm tall object is placed in front a convex mirror with a focal length of (-5.25) cm. If the magnification is 1/9, what is the distance from the object to the mirror. Give your answer in centimeters (cm).

c.  A (2.50) cm tall object is placed at a distance of (18.20) cm from a convex mirror. The distance from the mirror to its focal point is (15.40) cm. Find the magnification of the image formed by the mirror. Give your answer with the correct sign.

d. A (7.20) cm tall object is placed in front of a convex lens. As a result, an image is with a height of (– 52.0) is produced on a screen placed (77.5) cm from the lens. Find the focal length of the lens. Give your answer in centimeters (cm) with the correct sign.

You are given the job of designing a bridge that is to be made of concrete slabs that rest on a steel support frame. The total length of the bridge is 306 m, and you want to be sure that the expansion joints are sufficiently large. If the temperature increases by 22

A diverging lens has a focal length of 14.0 cm. Locate the images for each of the following object distances. For each case, state whether the image is real or virtual and upright or inverted, and find the magnification. (a) 28.0 cm q = cm (b) 14.0 cm q = cm

Does the Maxwell’s demon violate the 2nd law of thermodynamics? If not, why?

A flywheel with a radius of 0.700m starts from rest and accelerates with a constant angular acceleration of 0.200rad/s2

A. Compute the magnitude of the resultant acceleration of a point on its rim after it has turned through 60.0 ?.

B. Compute the magnitude of the resultant acceleration of a point on its rim after it has turned through 120.0 ?.

I want important notes and equations in chapter 8 physics 1
Related topics:

work done by constant forces

chapter 9:
1. kinetic energy

2. gravitational potential energy

chapter 10:

1. elastic potential energy

2. power

A concave mirror has a focal length of 32.2 cm. The distance between an object and its image is 54.7 cm. Find (a) the object and (b) image distances, assuming that the object lies beyond the center of curvature and (c) the object and (d) image distances, assuming that the object lies between the focal point and the mirror.