4. explain what must happen to an object in order for it to accelerate.

Newton's second law proves that a constant force is acted on a huge body and it causes to accelerate the change and its velocity and at a 'constant rate'.

Explanation:

The application of the force of an object may causes to accelerate in the 'direction of the force'. The object is in motion from a moving inertial reference frame, then the body may appear to speed up and slow down and it change the direction depending on the direction of the force. The direction of the object and reference frame are moving relatively each other.

The force due to the gravitational acceleration a force is exerted on earth and it acts on bodies on the earth. 'Acceleration' is a change of velocity of a body with the time. An object's acceleration it results of all forces they act on the object by the Newton's Second Law.

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.

on the planet jupiter, the acceleration due to gravity is approximately 26 m s2 , roughly 2.7 times the acceleration due