Thursday
October 2, 2014

Homework Help: physics

Posted by Edwin on Monday, March 22, 2010 at 11:27am.

A bird of mass 0.8kg hovers upwards by beating the mass of effective area 0.5m^2. (i) what is its upthrust? (ii) estimate the velocity imparted to the air by beating of the wings assuming the density of air at STP to be 1.3kg/m^3.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

PHYSICS - A hummingbird is able to hover because, as the wings move downwards, ...
physics - Consider a body falling through the air. The force due to air ...
physics - Estimate the speed of the parachutist descending at the constant ...
physics - A 50kg rocket is fired vertically upwards and experiences a 300N air ...
physics - Estimate the speed of the parachutist descending at the constant ...
physics - Bird bones have air pockets in them to reduce their weight–this also ...
Physics - A hot-air balloon has a total mass of 720 kg. It accelerates downwards...
Physics - A rocket was launched and it now has an acceleration of 3m pers second...
Physics (please help!!!!) - The mass m = 14 kg shown in the figure is displaced ...
Theory of Vibration - (1) The time for vibration of a viscous-damped spring mass...

Search
Members