1) As afirmações a seguir tratam da aceleração centrípeta. I – A aceleração centrípeta é responsável pela alteração da direção e do sentido do vetor velocidade. II – A aceleração centrípeta pode ser definida pelo produto do quadrado da velocidade angular pelo raio da trajetória. III – O vetor aceleração centrípeta possui a mesma direção e sentido do vetor velocidade. Está correto o que se afirma em: * 2 pontos
a) I e III
b) I e II
c) II e III
d) Apenas I

1134567 a jet with mass m = 1.1 ă— 105 kg jet accelerates down the runway for takeoff at 2 m/s2. 1) what is the net horizontal force on the airplane as it accelerates for takeoff? 2.2*10^5 n your submissions: 2.2*10^5 computed value: 220000submitted: saturday, january 26 at 2: 41 pm feedback: correct! 2) what is the net vertical force on the airplane as it accelerates for takeoff? 0 n your submissions: 0 computed value: 0submitted: saturday, january 26 at 2: 41 pm feedback: correct! 3) once off the ground, the plane climbs upward for 20 seconds. during this time, the vertical speed increases from zero to 21 m/s, while the horizontal speed increases from 80 m/s to 95 m/s. what is the net horizontal force on the airplane as it climbs upward? n 4) what is the net vertical force on the airplane as it climbs upward? n 5) after reaching cruising altitude, the plane levels off, keeping the horizontal speed constant, but smoothly reducing the vertical speed to zero, in 13 seconds. what is the net horizontal force on the airplane as it levels off? n 6) what is the net vertical force on the airplane as it levels off?

How many hydrogen (h) atoms are in one molecule of sulfuric acid, h2so4? (1 points) 1 2 4 7

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.