Phil says that if a car is moving there must be a resultant force acting on it alarm says there doesn't need to be a resultant force acting on it who do you agree with and why

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)

There is no gravity in outer space . explain why this statement is true or false