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Male mosquitoes in the mood for mating find female mosquitoes of their own species by listening for the characteristic "buzzing" frequency of the female's wing beats. This frequency is about 620 wing beats per second. a.) How many wing beats occur in one minute? b.) How many cycles of oscillation does the radiation from a cesium-133 atom complete during one mosquito wing beat?
A electron is accelerated from rest by the potential difference of 350 V. It then enters a uniform magnetic field of magnitude 200 mT with its velocity perpendicular to the field.
A hawk is flying horizontally at 17.0m/s in a straight line, 160 m above the ground. A mouse it has been carrying struggles free from its grasp. The hawk continues on its path at the same speed for 2.00s before attempting to retrieve its prey.
A 1x10^2-kg crate is being pushed across a horizontal floor by a force that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.25. What must be the magnitude of, so that the net work completed by it and the kine..
An aluminium block of mass m1 = 3.45 kg and a copper block of mass m2 = 6.30 kg are connected by a light string over a frictionless pulley. They sit on a steel surface, where θ = 40.0°
What is the difference between the acceleration of his head and feet if the astronaut is 2.00 m tall.
determine average net force exerted in the barrel of cannon.
Objective questions based on work, energy, power.
What is potential barrier for the molecule aggregation? Will the solution be stable at these conditions? Will it be stable at 100 mmol/L salt concentration?
A series RLC circuit with L = 15 mH, C = 3.1 F, and R = 4.7 is driven by a generator with a maximum emf of 120 V and a variable angular frequency 8700. Find out phase angle (in degrees).
A 7.50 nC charge is located 1.80 m from a 4.20 nC charge. (a)Find the magnitude of the electric force that one particle exerts on the other. (b) Is the force attractive or repulsive?
An elastic cord is 66 cm long when a weight of 66 N hangs from it but is 86 cm long when a weight of 76 N hangs from it. What is the "spring" constant k of the elastic cord.
pipe open at one end only has a fundamental frequency of 237 Hz. A second pipe, initially identical to the first pipe, is shortened by cutting off a portion of the open end. Currently, when both pipes vibrate at their fundamental frequencies, a beat ..
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