20 miles per hour north is an example of ______A) acceleration
B) velocity
C) deceleration
D) speed

Answers

Answer 1

Answer: B. It's an example of velocity due to the fact that it has a measurement of speed, divided by time, and has a specific direction. Acceleration doesn't have any direction on it, but has speed divided by time. C and D have a different mode of measurement despite of the fact that it still needs meters/miles/km.

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Draw in force and velocity vectors at the four marked positions the object below is moving counterclockwise in uniform circular motion

Answers

This is what it would look like—
Angular velocity = w
Linear velocity = v
Centripetal acceleration = ac

How dose an atom become an ion with a -2 charge?

Answers

A atom can become an ion with a -2 charge, if it gains 2 electrons during a chemical reaction.

The point on a graph where X and Y values meet is called A. the axis.
B. the origin.
C. the starting line.
D. an intersection point.

Answers

The point where x and y values meet is called the origin.

the point where they meet at is called the origin

Current is constant at all points in a parallel circuit

Answers

We have to be a little careful working with this question.   Do you mean
that current is "constant" or do you mean it's "the same current" ?

-- If the energy source for the circuit is supplying DC ... like a battery
   or a solar cell ... then the current is 'constant' at every point in the
   circuit. It's not changing. It's the same now as it was 10 seconds
   ago. But it's NOT necessarily the same amount of current everywhere
   in the circuit.

-- If the energy source for the circuit is not supplying DC ... if it's an
   AC generator, or a charged capacitor, or a function generator ...
   then wherever you look in the circuit, the current is constantly
   changing its value at that point.

-- And if there's any place in the circuit where there are components
   connected in parallel, then the current must have different values
   at different points in the circuit.
   It can't be the same current everywhere.

You're conducting a physics experiment on another planet. You drop a rock from a height of 2.3 m and it hits the ground 1.1 seconds later. What is the acceleration due to gravity on this planet?A. 4.2 m/s2
B. 3.8 m/s2
C. 2.4 m/s2
D. 9.8 m/s2