False only some eukaryotes have cell wall like plants, fungi, and some bacteria.
Answer:
Explanation:
You can always figure out something to say about a question like this if you have a formula to work with. Likely you do.
There are many ways it can be written
R = k * L / A
So here's the answer.
Resistance = k which depends of the properties of the material used to make the wire * the Length of the wire divided by the cross sectional area of the wire.
Psychology is considered a science because it utilizes scientific methodology for devising treatments and measuring outcomes.
Answer: A) velocity is negative and acceleration is positive (-, +)
B) velocity is positive and acceleration is positive (+, +)
Explanation: A) It has been stated in the question that upward motion is to the positive y axis which implies that downward motion is to the negative axis.
The elevator is moving downward which implies that all quantities such as velocity, acceleration and height has negative value (time is always positive).
Before the button was pressed, the body is accelerating and moving with a velocity but since we are along the negative axis they are both negative.
Once the button was pressed the elevator starts decelerating making it have a negative acceleration (-a). This negative acceleration is on the negative y axis this making us have - (-a) =+a.
The elevator still moves with the same value of velocity thus making it retain it negative sign due to the negative axis
B) This motion is along the positive y axis since it is an upward motion thus making all physical quantities such as velocity, acceleration and height positive.
The boy throws the baseball up meaning that an initial velocity is needed to start up the motion.
This velocity is positive (+). As the baseball starts it motion it accelerates which is also positive (+), thus making both velocity and acceleration positive.
