Physics

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

published on January 27, 20162 responses 0 5.0★ / 5

How do you measure the density of a liquid?

manometer
ammeter
hydrometer

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

Heat can be expressed in

amps or volts
calories or joules
calcious or fahrenheit

Which is the bigger degree?

1 degree fahrenheit
1 degree celcius

What is the force like quantity in an electrical system?

pressure
voltage
force

Newton's first law?

Law of inertia
Law of acceleration
law of interaction

Specific gravity has a unit

True
False

What's the conversion for celcius to fahrenheit?

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

force
pressure
temperature difference

what's the equation for sensible heat?

q=mc delta t
q= m x Hv
q=m x Hf

The weight density of water is

14.7 psi
61 lb/ft3
62.4 lb/ft3

You use a voltmeter to

measure potential difference
measure current
measure pressure

Check the advantages to a simple machine

Select the three correct answers
allows you to do less work
reverses direction
shorter distance
make work easier

psi is also

In a real machine

work out = work in
work out > work in
work in > work out

To measure voltage, you use

a barometer
a multimeter
an ammeter

resistance is given in

What is the force like quantity in a thermal system?

force
voltage
temperature difference

the advantage to using a pulley is that it

allows you to do less work
shortens the distance
reverses direction

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

force
pressure
torque

fraction of Earth weight on moon

1/10
1/6
1/4

work =

F x d
F x mass
F x A

AC's voltage source is from

a voltmeter
a battery
a generator

sensible heat (on the table) is

horizontal
diagonal
vertical

Efficiency is

Work/mass
F x d
work out/ work in

P (atmosphere) + P (gage) =

What is the force like quantity in a fluid system?

force
pressure
voltage

pressure=

F/A
N/m
m x a

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

The heat required to melt a substance

latent
sensible
calories

Heat moves from

hot air to cold air
warm temperature to cold tempature
high temperature to low temperature

Distance =

F/a
v/m
m/v

Work is expressed in

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

balance; scale
manometer; scale
scale; balance

Newton's third law is

the law of inertia.
the law of acceleration.
the law of interaction.

In q=mcat, what does q stand for?

heat energy
specific heat
specific gravity

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

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

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

AC vs DC

current changes direction periodically; current in 1 direction
current in 1 direction; current changes direction periodically

What units is torque given in?

kg
N x m
m/s2

T=

Force x distance
Mass x acceleration
Force x mass

coulombs are the variable for

current is given in

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

The upwards force exerted on a floating object by a fluid

Characteristics of weight are

Select the three correct answers
lb, N
slug
how hard gravity pulls on a mass
can change
cannot change

An ideal machine has

a bad effiency
no friction
lots of pressure

Batteries are

AC
DC
Nice