Physics

Force and work in Electrical, Rotational, Thermal, and Electrical Systems.

published on January 27, 2016
1/49

Distance =

F/a
v/m
m/v
2/49

If the wind is pushing north at 20 mi/hr, and a bird is flying south at 15 mi/hr, what is the resultant of combining the two vectors?

35
5
0
3/49

Efficiency is

Work/mass
F x d
work out/ work in
4/49

The principle that states that a change in pressure at any point in a confined fluid is transmitted undiminished throughout a fluid

5/49

current is given in

6/49

In a real machine

work out = work in
work out > work in
work in > work out
7/49

Heat moves from

hot air to cold air
warm temperature to cold tempature
high temperature to low temperature
8/49

P (atmosphere) + P (gage) =

9/49

You use a voltmeter to

measure potential difference
measure current
measure pressure
10/49

In q=mcat, what does q stand for?

heat energy
specific heat
specific gravity
11/49

What units is torque given in?

kg
N x m
m/s2
12/49

The weight density of water is

14.7 psi
61 lb/ft3
62.4 lb/ft3
13/49

If the compressor in a hydraulic lift exerts 30 psi of air on the hydraulic fluid, and the radius of the piston is 6 inches, the force is....

3393lb
4456lb
20lbs
14/49

What is the force like quantity in an electrical system?

pressure
voltage
force
15/49

Heat can be expressed in

amps or volts
calories or joules
calcious or fahrenheit
16/49

resistance is given in

17/49

Check the advantages to a simple machine

Hint: 3 choices
allows you to do less work
reverses direction
shorter distance
make work easier
18/49

fraction of Earth weight on moon

1/10
1/6
1/4
19/49

To measure voltage, you use

a barometer
a multimeter
an ammeter
20/49

psi is also

21/49

AC vs DC

current changes direction periodically; current in 1 direction
current in 1 direction; current changes direction periodically
22/49

The upwards force exerted on a floating object by a fluid

23/49

Batteries are

AC
DC
Nice
24/49

Work is expressed in

25/49

How do you measure the density of a liquid?

manometer
ammeter
hydrometer
26/49

What's the conversion for celcius to fahrenheit?

27/49

what's the equation for sensible heat?

q=mc delta t
q= m x Hv
q=m x Hf
28/49

coulombs are the variable for

29/49

work =

F x d
F x mass
F x A
30/49

Characteristics of weight are

Hint: 3 choices
lb, N
slug
how hard gravity pulls on a mass
can change
cannot change
31/49

Newton's first law?

Law of inertia
Law of acceleration
law of interaction
32/49

the advantage to using a pulley is that it

allows you to do less work
shortens the distance
reverses direction
33/49

What is the force like quantity in a fluid system?

force
pressure
voltage
34/49

thermal energy is

measure of the average of each particle in the substance
sum total of the energy of all the particles within the substance
35/49

What is specific heat?

when an object is immersed in a fluid, the upwards force on the object is equal to the weight of the fluid displaced
amount of heat required to change the temperature of one gram of a substance by 1 degree
the ratio of the density of a substance to the density of water
36/49

What is the force-like quantity in a mechanical system?

force
pressure
temperature difference
37/49

Newton's third law is

the law of inertia.
the law of acceleration.
the law of interaction.
38/49

T=

Force x distance
Mass x acceleration
Force x mass
39/49

What is the force like quantity in a rotational mechanical system?

force
pressure
torque
40/49

Which is the bigger degree?

1 degree fahrenheit
1 degree celcius
41/49

The heat required to melt a substance

latent
sensible
calories
42/49

What do you use to measure weight? What do you use to measure mass?

balance; scale
manometer; scale
scale; balance
43/49

Specific gravity has a unit

True
False
44/49

sensible heat (on the table) is

horizontal
diagonal
vertical
45/49

What is the force like quantity in a thermal system?

force
voltage
temperature difference
46/49

Archimedes Principle says:

every action has a equal and opposite reaction
the upwards force on the object is equal to the weight of the fluid displaced
the ratio of the density of a substance is to the density of water
47/49

pressure=

F/A
N/m
m x a
48/49

An ideal machine has

a bad effiency
no friction
lots of pressure
49/49

AC's voltage source is from

a voltmeter
a battery
a generator