1) Maria saiu de Mosqueiro às 6 horas e 30 minutos, de um ponto da estrada onde o marco quilométrico indicava o km 60. Ela chegou a Belém às 7 horas e 15 minutos, onde o marco
quilimétrico da estrada indicava o km 0. Qual o módulo da velocidade média, em km/h,
do carro de Maria em sua viagem de Mosqueiro até Belém? Qual o tipo do movimento de
Maria, movimento progressivo ou movimento retrógrado?
(a) 45
(b) 55
(c) 60
(d) 80
(e) 120

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

Asystematic approach to problem solving is called a (an)

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.