A styrofoam block of volume 0.50 cubic meters is submerged in a lake and tied to the bottom of the lake by a chain. What is the tension in the chain? 3.45e3 N 4.73e3 N 01.22e3 N 0.98e3 N

In the figure below, a metal bar sitting on two parallel conducting rails, connected to each other by a resistor, is pulled to the right at a constant speed. The resistance R = 6.00 Q, the distance between the rails is { = 1.20 m, and a uniform 2.30 T magnetic field is directed into the page. At what speed (in m/s) should the bar be moved to produce a current of 0.500 A in the resistor? R Fapp m/s

. A beam of white light goes from air into water at an incident angle of 75.0°. At what angles are the red (660 nm) and violet (410 nm) parts of the light refracted? Are the angles going to be different if the light strikes a crown glass slab, instead of water? Explain.

I drag a stick at 2 m/s through an extremely shallow rectangular box filled with oil, creating a shock wave. I measure the angle made by the wave with the line along which the stick isdragged to be 45°. What is the speed of surface waves in this box?

A wire with length 4.0 cm stretches along the x axis and carries a 3.0 A current to the right (+) The wire is in a uniform magnetic field B-(0.25i-0.30j+0.22k) T Determine the x-component of the force on the wire Express your answers using two significant figures. ΕΧΕΙ ΑΣΦ Fx 2.6 102 Submit Previous Answers Request Answer Part B Incorrect; Try Again; One attempt remaining Determine the y-component of the force on the wire. Express your answers using two significant figures. ΕΧΕΙ ΑΣΦ Fy Submit Previous Answers Request Answer ? ? N N

3.1 What is the minimum possible thickness of a soap bubble suppose it looks green (λ=500nm) when viewed at an angle of 45 degrees from the surface normal of the bubble? What is its color when viewed from the surface normal direction? Why the color looks grey before a soap bubble breaks? Suppose soap water has a refractive index of n=1.33 for all wavelengths of light. Na

Four long, parallel conductors carry equal currents of = 1.00 A. The figure below is an end view of the conductors. The current direction is into the page at points A and B and out of the page at C and D. A × C B(x (a) Calculate the magnitude of the magnetic field at point P, located at the center of the square of edge length = 0.200 m. με

A Christmas ball in shape of a hollow sphere is hung from the tree by a piece of thread attached to the surface of the ball. The mass and radius of the ball are 0.105 kg and 0.12 m, respectively. What will be its period of oscillation when slightly displaced from its equlibrium position? (Hint: I={(2/3)mr^2})

8. According to drinking water regulations, the maximum allowable concentration of Pb2+ ions in water is 0.045 ppm. Is this guideline exceeded if an underground water supply is at equilibrium with the mineral anglesite, PbSO4 (Ksp = 1.6 x 10-8)?

45. DETAILS MY NOTES OBINPHYS8 5.Q.044. ASK YOUR TEACHER Six insulated containers hold 3,000 g of water at 24°C. A small copper cylinder is placed in each container; the masses and initial temperatures of the cylinders vary as given below. Rank the containers according to the maximum temperature of the water in each container after the cylinder is added, from largest to smallest. You may assume that the cylinder is completely submerged in the water. (Use only ">" or "=" symbols. Do not include any parentheses around the letters or symbols.) a. m 200 g; T = 30°C b. m 400 g; T = 60°C c. m =600 g: T = 90°C d. m 400 g: T = 15°C e. m 600 g: T = 30°C f. m 200 g; T = 60°C Submit Answer