PART ONE
A cello string vibrates in its fundamental
mode with a frequency of 239 1/s. The vibrating segment is 76.2 cm long and has a
mass of 0.48 g.
Find the tension in the string.
Answer in units of N.

PART TWO (REQUIRES PICTURE)
Find the frequency of the string when it
vibrates in six segments.
Answer in units of 1/s.

We want to calculate the total metabolic heat generated by a singing canary taking into account heat transfer by radiation, convection and exhaling air. the air temperature is 20 oc, canary’s body internal and surface temperature is 33oc, external body surface convective heat transfer coefficient is 25.2 w/m2 .k, temperature difference between the inhaled and exhaled air is 4.3 oc, the ventilation rate is 0.74 cc of air per second, specific heat of air is 1.0066 kj/kg.k and density of air is 1.16 kg/m3 . assume the canary’s body to be a cylinder with 7 cm diameter and 9 cm length, and heat exchange is from the side as well as the top and bottom of cylinder. calculate 1) the net rate of heat lost by radiation, assuming heat gained by the bird through radiation from the surroundings is 11.5 w; 2) rate of heat transferred by convection to the surrounding air; 3) rate of heat transferred in the exhaling air without considering any internal evaporation; 4) total metabolic power.

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.