In the figure, a thin horizontal bar AB of negligible weight and length L = 3.2 m is hinged to a vertical wall at A and supported at B by a thin wire BC that makes an angle θ = 40° with the horizontal. A block of weight W = 140 N can be moved anywhere along the bar; its position is defined by the distance x = 2.07 m from the wall to its center of mass. Find (a) the tension in the wire, and the (b) horizontal and (c) vertical components of the force on the bar from the hinge at A.

A long wire carrying a 4.5A current perpendicular to the xy-plane intersects the x-axis atx=?2.0cm.

Part A

At what point on the x-axis is the magnetic field zero if the two currents are in the same direction?

Express your answer using two significant figures.

Part B

At what point on the x-axis is the magnetic field zero if the two currents are in opposite directions?

Express your answer using two significant figures.

A medical technician is trying to determine what percentage of a patient's artery is blocked by plaque. To do this, she measures the blood pressure just before the region of blockage and finds that it is 1.20×10⁴ Pa , while in the region of blockage it is 1.15×10⁴ Pa . Furthermore, she knows that blood flowing through the normal artery just before the point of blockage is traveling at 27.5 cm/s , and the specific gravity of this patient's blood is 1.06.

Part A: What percentage of the cross-sectional area of the patient's artery is blocked by the plaque?

A turntable rotating 33 rev/m slows to a stop in 10s. If the acceleration is constant, the number of revolutions through which the turntable rotates in the 10 is?

A. 7.8

B. 1.4

C. 12.2

D. 2.7

E 6.1

Describe what parallax is.

the position a the rocket sled on a straight track is given as x= at^3+ bt^2+c, where a= 1.04m/s^2, b=1.94 m/s^2, and c= 8.29m. what is the sled's average speed between t= 3.72 and t=6.79

Water flowing along a horizontal pipe has a speed of 2.31 m/s and a pressure of 4.25 atm. Further along, the pipe narrows so that the cross-sectional area decreases by a factor of 6.17. What is the pressure in the narrow section?

#1 A solid, homogeneous sphere with a mass of m₀, a radius of r₀ and a density of ρ₀ is placed in a container of water. Initially the sphere floats and the water level is marked on the side of the container. What happens to the water level, when the original sphere is replaced with a new sphere which has different physical parameters? Notation: r means the water level rises in the container, f means falls, s means stays the same. Combination answers like 'f or s' are possible answers in some of the cases.

r f s r or s f or s  The new sphere has a radius of r = r₀ and a mass of m > m₀.
r f s r or s f or s  The new sphere has a radius of r = r₀ and a density of ρ > ρ₀.
r f s r or s f or s  The new sphere has a density of ρ > ρ₀ and a mass of m = m₀.

#1.1 A solid, homogeneous sphere with a mass of m₀, a radius of r₀ and a density of ρ₀ is placed in a container of water. Initially the sphere floats and the water level is marked on the side of the container. What happens to the water level, when the original sphere is replaced with a new sphere which has different physical parameters? Notation: r means the water level rises in the container, f means falls, s means stays the same. Combination answers like 'r or f or s' are possible answers in some of the cases.

r f s r or s f or s r or f or s  The new sphere has a radius of r < r₀ and a mass of m > m₀.
r f s r or s f or s r or f or s  The new sphere has a density of ρ < ρ₀ and a mass of m > m₀.
r f s r or s f or s r or f or s  The new sphere has a density of ρ > ρ₀ and a radius of r < r₀.

Please help

A 90g ball is tied to a string so that the center its mass hangs 50 cm below the point where the string is tied to a support rod. The ball is pulled aside to a60° angle with vertical and released. As the string approaches vertical, it encounters a peg at a distance x below the support rod. The string then bends around the peg. If the position of the peg is low enough, the ball will move in a circle wrapping the string around the peg. a.) What is the work done by nonconservative force? And the total mechanical energy for the ball as it swing and rotate around the support rod and peg. b.) What is the smallest value of x for which the ball will move in a circle wrapping the string around the peg. Then predict what will happen to the mechanical energy, gravitational potential energy, kinetic energy, speed, and centripetal force when x reaches its minimum value. Set up a mathematical equation that satisfy the condition for minimum x and solve it based on the conditions provided

Two light bulbs are 1.00 mapart. From what distance can these light bulbs be marginally resolved by a small telescope with a 3.90 cm-diameter objective lens?

Assume that the lens is diffraction limited and λ=600nm.

A 3.5-kg object is supported by an aluminum wire of length 1.8 m and diameter 2.0 mm . How much will the wire stretch?

What are magnetic poles? Why are they called north pole and south pole?

An AC generator with an output rms voltage of 18 V at a frequency of 60 Hz is connected across a 3

When a 23.0-V emf device is placed across two resistors in series, a current of 14.0 A is flowing in each of the resistors. When the same emf device is placed across the same two resistors in parallel, the current through the emf device is 64.0 A. What is the magnitude of the larger of the two resistances?