Male and female mosquitoes emit different sound frequencies while in flight, and their antennae are sensitive to different frequencies. the sound made by male mosquitoes in flight is close to 650 hz , 650 hz, whereas the sound made by females is close to 400 hz . 400 hz. the natural frequency of males' antennae is about 400 hz , 400 hz, whereas that of females is about 200 hz . 200 hz. biologists suspect that some mosquitoes can detect the presence of other mosquitoes based on nerve signals generated when their antennae vibrate strongly. assuming that the biologists are correct, the emitted frequencies of flying mosquitoes and the vibrational frequencies of their antennae suggest it is likely that male mosquitoes can detect flying females.

female mosquitoes can detect flying members of both sexes.

female mosquitoes can detect flying females.

both sexes can detect flying females.

male mosquitoes can detect flying males.

female mosquitoes can detect flying males

this means that the temperature of both substances will be equal

d) physical means can be used to separate the components of air.

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2