Physics quiz! 1) a projectile has a vertical component and a horizontal component. true false 2) the shape of a projectile's trajectory is an ellipse. true false 3) during the course of trajectory, the horizontal component of the velocity is a) constant b) increasing c) decreasing d) negative

1.

True

Explanation: A projectile is launched at certain angle with the horizontal. Hence, its equation of motion can be described using vertical and horizontal components. Therefore, the statement is true.

2.

False

Explanation:

The shape of the trajectory of a projectile is parabola. Hence, the given statement is false.

3.

A) constant

Explanation: During the course of trajectory, the horizontal component of the velocity is constant. There is no external force acting in the horizontal direction. In the vertical direction,  acceleration due to gravity acts which increases the vertical component of velocity. Hence, the correct option is A.

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

im guessing the west of station b