Question

Please answer worth 100 point n what direction does an applied force move an object?

Which of the following is not an example of work?
Watt, which is a unit of power, is equal to_________________.
A joule, which is a unit of work, is equal to________________.
Which simple machines make up scissors?
Unit 2
When a driver touches a car's steering wheel on a hot day, heat is transferred to the driver's hands by __________.
Sun warms the earth by________.

How can you tell if two objects are in thermal equilibrium?

What happens when the temperature of an object increases?

What happens when the temperature of an object decreases?
Unit 3
Which type of wave has a wave perpendicular to the disturbance?

Which of these waves cannot travel in a vacuum?

Which is true of a mechanical wave?

The Doppler effect is used at baseball games to measure______.

The Doppler effect is used in hospitals to_____.

Unit 4

Which color is absorbed, and which is reflected by the leaves of most plants?

Which part of the electromagnetic spectrum is divided into seven ranges of wavelengths and is the part visible to the human eye?

Most objects emit infrared energy. How do humans recognize this?

Exposure to what type of radiant energy is sensed by human skin as warmth?

Reflexio is the Latin root for which word?

Unit 5

Can two negatively charged balloons move apart without ever touching? Why or why not?

What causes an electric current in a wire?

Why does a light go out when you turn off the wall switch?

Why does the light bulb in a circuit turn on when you close the switch?

A bar magnet is dipolar. This means is has ___ poles.

Answer 1

1) in the direction of the applied force

2)when the movement is not in the direction of the applied force it is not work. But if a component, or part of the motion is in the direction of the applied force it is work.

3)Joules/sec

4)Force/displacement

6)Wedges and lever

5)conduction

6)radiation

7)there is no heat flow

8)The average kinetic motion of the particles increases, there is more thermal energy

9)The average kinetic motion of the particles decreases, there is less thermal energy

10)transverse wave

11) sound waves

12)they transfer energy through oscillations in matter

13)the speed of the pitched baseball

14)to detect speed and direction of blood flow

15)green and violet are reflected and red is absorbed

16)visible light

17)as heat

18)infrared light/infrared energy

19)reflection

20) yes, the forces emitted by having the same charge repells them.

21)the flow of electrons

22)You open the circuit and the electrons can't flow

23)You closed the circuit and the electrons can flow

24)I think you meant bipolar, this means 2 poles