Question
Which of the following can be used for biological
control of mosquitoes?Solution
Gambusia can be used for the biological control of mosquitoes. Gambusia is a fish species that feeds on larvae of mosquitoes. Oil can also be used to prevent the breeding of mosquitoes on stagnant water by creating an oil slick on water. Ointments are used by humans which provide protection from mosquito bites. Dichlorodiphenyltrichloroethane (DDT) is an insecticide which can also be used to control (Not biologically) mosquitoes.
Which of the following is NOT a vector quantity? Â
The kinetic energy of a body is directly proportional to — Â
Global warming is expected to result in
A pulse of light duration 10-5 s is absorbed fully by a little object initially at rest. If the power of this pulse is 45 × 10-3...
What is the potential difference across a 5 Ω resistor when a current of 2 A flows through it?
Mirror formula is
Two spherical conductors of radii 2 cm and 8 cm are connected. The ratio of charges on them at equilibrium is:
A charged particle oscillates about its mean equilibrium position with a frequency of 105 Hz. What is the frequency of the electromagnetic wa...
A projectile is launched at an angle of 30° with the horizontal and remains in the air for 5 seconds. What is the range of the projectile? (Take g = 10...
Ultrasonic waves, propagating through a medium, can be detected by:
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