Answer the following question given this paragraph: Radar stands for ra dio d etection and r anging. In police radar, a radar gun sends out short bursts of microwaves. The microwaves reflect back from oncoming vehicles and are detected by a receiver in the radar gun. The frequency of the reflected waves is used to compute the speed of the vehicles. Radar is also used for tracking storms, detecting air traffic, and other purposes. Q: In police radar, a radar gun sends out short bursts of which waves? Choices: - photons - soundwaves - electrodes - microwaves A:
microwaves
(Question)
Answer the following question given this paragraph: Hearing losses can occur because of problems in the middle or inner ear. Conductive losses in the middle ear can be partially overcome by sending sound vibrations to the cochlea through the skull. Hearing aids for this purpose usually press against the bone behind the ear, rather than simply amplifying the sound sent into the ear canal as many hearing aids do. Damage to the nerves in the cochlea is not repairable, but amplification can partially compensate. There is a risk that amplification will produce further damage. Another common failure in the cochlea is damage or loss of the cilia but with nerves remaining functional. Cochlear implants that stimulate the nerves directly are now available and widely accepted. Over 100,000 implants are in use, in about equal numbers of adults and children. The cochlear implant was pioneered in Melbourne, Australia, by Graeme Clark in the 1970s for his deaf father. The implant consists of three external components and two internal components. The external components are a microphone for picking up sound and converting it into an electrical signal, a speech processor to select certain frequencies and a transmitter to transfer the signal to the internal components through electromagnetic induction. The internal components consist of a receiver/transmitter secured in the bone beneath the skin, which converts the signals into electric impulses and sends them through an internal cable. Q: Conductive losses in the middle ear can be partially overcome by sending sound vibrations to what structure through the skull, the principle behind implants for hearing loss patients? Choices: - tympanic membrane - hammer and anvil - cornea - cochlea A:
(Answer)
cochlea
Ques: Answer the following question given this paragraph: Water is essential to life because biochemical reactions take place in water. Most people can survive only a few days without water. Q: Most people can survive only a few days without what essential substance? Choices: - air - food - carbon - water A:
Ans: water
(Q).
Answer the following question given this paragraph: Physical properties describe the existence of matter, and chemical properties describe how substances change into other substances. Q: What properties describe the existence of matter, as opposed to chemical properties that describe how substances change into other substances? Choices: - gravitational - astronomical - biological - physical A:
(A).
physical
Ques:Answer the following question given this paragraph: Birds are endothermic tetrapod vertebrates. They are bipedal, which means they walk on two legs. Birds also lay amniotic eggs, and the eggs have hard, calcium carbonate shells. Although birds are the most recent class of vertebrates to evolve, they are now the most numerous vertebrates on Earth. Why have birds been so successful? What traits allowed them to increase and diversify so rapidly?. Q: What type of vertebrates are birds? Choices: - epidermal tetrapod - invertebrates - exothermic - endothermic tetrapod A:

Ans:endothermic tetrapod
Ques: Answer the following question given this paragraph: Secondary Succession. Two months after a forest fire, new plants are already sprouting among the charred logs. Q: When did new plants start sprouting after the forest fire? Choices: - five months later - two weeks later - two days later - two months later A:
Ans:
two months later