Physics, 26.10.2019 17:43 alecnewman2002
Ahummingbird hovers by exerting a downward force on the air equal, on average, to its weight. by newton's third law, the air exerts an upward force of the same magnitude on the bird's wings. find the average mechanical power (in w) delivered by a 2.80 g hummingbird while hovering if its wings beat 70.0 times per second through a stroke 3.10 cm long.
Answers: 2
Physics, 21.06.2019 15:00
Ineed with these last two questions: 1) what are two types of cold air masses that influence the weather in north america? name them and describe their humidity. 2) describe the motion of a cold air mass and a warm air mass and the weather you would expect at a warm front and an occluded front.
Answers: 1
Physics, 21.06.2019 20:20
How much work would a child do while puling a 12-kg wagon a distance of 3m with a 22 n force directed 30 degrees with respect to the horizontal? (a) 82j (b) 52j (c) 109j (d) 95j
Answers: 2
Physics, 21.06.2019 21:30
Apendulum has a mass of 1.5 kg and starts at a height of 0.4 m. if it is released from rest, how fast is it going when it reaches the lowest point of its path? acceleration due to gravity is g = 9.8 m/s2. a. 2.8 m/s b. 0 m/s c. 5.9 m/s d. 4.3 m/s
Answers: 1
Physics, 22.06.2019 15:30
What is a view of science and psychology that says the value of knowledge depends on its usefulness? a. pragmatism b. psychotherapy c. physiology
Answers: 2
Ahummingbird hovers by exerting a downward force on the air equal, on average, to its weight. by new...
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