When you illustrate the problem description, the direction of distance travelled is shown in the picture. But actually, since you are asked of the average velocity, you really don't need the drawing. It is given that the constant speed is 55 km/h. Since distance is speed multiplied with time, then you only have to multiply the constant speed and the respective time so you can find the distance. The average velocity, on the other hand, is the total distance per total time travelled. So since there is a constant speed, all the terms for time will be cancelled. Therefore, the average velocity is the constant speed. But we have to add the direction, which is south so it will denote a negative sign. The final answer for average velocity is -55 km/h.
Answer:
Option d.
Explanation:
An endergonic response alludes to a chemical reaction where energy is being utilized in the general response, making the response non-unconstrained and thermodynamically not favorable for the reaction.
Energy is being assimilated as the reaction continues and there is an overall deficit of energy in the encompassing system.
Endergonic responses require a contribution of energy, normally greater than those of non unconstrained exergonic responses, from an outside source in order to disrupt the equilibrium to cause variations, for example, formation of bonds.
This contribution of energy is known as the activation energy. In specific responses, an impetus is accessible to accelerate endergonic responses.
The energy for an endergonic response or reaction is acquired by coupling the response with an exergonic response.
Answer:
An object at rest does not move and an object in motion does not change its velocity, unless an external force acts upon it
Explanation:
This statement is also known as Newton's first law, or law of inertia.
It states that the state of motion of an object can be changed only if there is an external force (different from zero) acting on it: therefore
- If an object is at rest, it will remain at rest if there is no force acting on it
- If an object is moving, it will continue moving at constant velocity if there is no force acting on it
This phenomenon can be also understood by looking at Newton's second law:
F = ma
where
F is the net force on an object
m is the mass
a is the acceleration
If the net force is zero, F = 0, the acceleration of the object is also zero, a = 0: therefore, the velocity of the object does not change, and it will continue moving at the same velocity (which can be zero, if the object was at rest).
A light-year is a <u>distance</u>.
It's the distance that light travels through vacuum in one year.
The distance is 9.4607 x 10¹² kilometers in metric units, and 5.8786 x 10¹² miles
in 'customary' units, and is normally written without a bunch of question marks.
Answer:
It is better to drive a large SUV in stead of a smaller car in icy conditions, because the large SUV contains enough friction of force to drive in the snow on the ground. The mass of the car also plays a huge effect on this because then it does not slide off the road. The large tires on the big SUV make you ride smoothly through the snow and ice. With driving a smaller car though, the old tires have already been through a lot of driving, so this makes driving the car rough on the road. This also makes it so there is not a normal force in the wheels, so this means the car does not go at its normal speed, and this could cause an accident, or the rough tires could cause a fire when driving.
Trust me on this. I am 17, and I drive a Nissan Armada as my first car. Life changing. Happy Holidays!
Explanation: