Me out

a student want to pick up a box that weighs 15 n. which statement below is true?
question 2 options:

a) with 5 n of upward force, the student can lift the box

b) since he is lifting it, any amount of upward force will lift it.

c) anything greater than 15 n will lift it because he has to overcome the weight first.

d) upward force does not determine whether the box could be lifted.

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.

Due in 40 explain in terms of frame of reference if you’re inside a moving train everything on the outside can seem to be moving

What is the frequency if a wave that pases a given pount 22 times in 2 seconds