V. Short Answer Type – II  ( any five)                                                  5 X 3 = 15 39. Explain the difference between thermoplastics and thermosetting plastics.

40. Explain how the use of CNG in automobiles has reduced pollution in our cities.

41. What is called blindspot?

42. Explain the usage of spring balance.

43. What precaution must be taken while taking antibiotics

44. Write short notes on Adam’s  apple right answer I mark brainlest ​

The function models the number of accidents

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?

Circle a has center of (2,3) and a radius of 5 and circle b has a center of (1,4) and a radius of 10. what steps will show that circle a is similar to circle b 1) dilate circle a by a scale factor of 2 2) translate circle a using the rule (x+1,y-1) 3) rotate circle a 180 degrees about the center 4) reflect circle a over the y-axis