Physics

How is it, that Quantum Theory is so amazing, and yet so many people don't know anything about it?

How is it, that Quantum Theory is so amazing, and yet so many people don't know anything about it?

Don't get me wrong; I'm not calling anyone stupid or ignorant or anything. I realize it's not just one little thing. I'm only beginning to learn about this amazing existence here.

I'm just saying: Quantum Theory is amazing, and the things out there

!JRon@n   595   5 Replies

nynkh

How much electrical potential energy does each coulomb of charge gain as it goes through the battery?

How much electrical potential energy does each coulomb of charge gain as it goes through the battery?

Voltage difference across the terminals of 6 volts. The resistance of the bulb is 2 ohms. It is a simple circuit.

Any help would be superb!

!JRon@n   643   1 Reply

nypharm

Determine the parametric equations of the line through a point and orthogonal to 2 lines?

Determine the parametric equations of the line through a point and orthogonal to 2 lines?

Determine the parametric equations of the line through point P and orthogonal to line #1 and line #2.
point P =(3,1,2)

line #1: (x-1)/2 = (y+2)/3 = (z-3)/-4
line #2: x/3 = (y-2)/1 = (z+1)/-5

#8   339   1 Reply

roaringspring

How would one calculate decibels and watts at a given distance?

How would one calculate decibels and watts at a given distance?

I have two problems but I can't find the equations to solve them, the first is "a sound system produces 90dBSPL at 4 feet with 1 watt of input. How much power will be needed to produce 105dBSPL at 75 feet?"

And the second problem is "A sound system

$abood$   461   1 Reply

rkarthik301

calculate the value of capacitor for the circuit to have a resonant frequency of 10khz.?

calculate the value of capacitor for the circuit to have a resonant frequency of 10khz.?

Calculate the value of capacitor for the circuit to have a resonant frequency of 10khz. Determine the voltage across the capacitor, the inductor, and the resistor, at resonance.    Also the characteristics for the circuit is: 10voltage supply, 500ohm

$abood$   597   2 Replies

lfernandez

what is the last element to be produced before a star goes supernova?

what is the last element to be produced before a star goes supernova?

what is the last element to be produced before a star goes supernova?

$abood$   356   5 Replies

rkarthik301

How does voltage relate to electric potential difference?

How does voltage relate to electric potential difference?

How does voltage relate to electric potential difference?"Each battery terminal and the plate of the capacitor connected to it are at the same potential; hence the full battery voltage appears across the capacitor."

Why does having the same potentia

$abood$   365   4 Replies

juliem

How many joules of energy are required to raise the temperature of 5g of water 10 degrees celcius?

How many joules of energy are required to raise the temperature of 5g of water 10 degrees celcius?

How many joules of energy are required to raise the temperature of 5g of water 10 degrees celcius?

an explanation would be wonderful :]

$abood$   597   2 Replies

Roadbiker2000

explain two ways in which the range of a javelin may be increased?

explain two ways in which the range of a javelin may be increased?

in most sporting activities involving the concept of projectile motion, the athlete usually tries to maximize his range.explain two ways in which the range of a javelin may be increased.

$abood$   275   1 Reply

Rita10

How to recover the value of ni for an electron that emits a photon of wavelength in nanometers?

How to recover the value of ni for an electron that emits a photon of wavelength in nanometers?

How to recover the value of ni for an electron that emits a photon of wavelength in nanometers to the ground state in the H atoms?

Rearanging the entire equation to find lambda seems to find n initial seems a bit too much. Any way around this?

$amanthaP24   1087   N/A

$amanthaP24

What is the gravitational acceleration on the surface of this planet?

What is the gravitational acceleration on the surface of this planet?

Having landed on a newly discovered planet, an astronaut sets up a simple pendulum of length 1.6 m and finds that it makes 303 complete oscillations in 557 s. The amplitude of the oscillations is very small compared to the pendulum?s length.
What is

*$JB$*   451   1 Reply

smlan3

What happens to a circuit when it is exposed to a higher current?

What happens to a circuit when it is exposed to a higher current?

A. The circuit carries current more quickly.  
B. The voltage in the circuit increases.  
C. The output of the circuit remains unchanged.  
D. The circuit begins to produce more heat.

*$JB$*   334   1 Reply

jthurmon

Electric energy travels in a closed circuit to light a bulb. How is the circuit affected if you open the switc

Electric energy travels in a closed circuit to light a bulb. How is the circuit affected if you open the switc

Electric energy travels in a closed circuit to light a bulb. How is the circuit affected if you open the switch?

*$JB$*   568   4 Replies

rkdgh2002

How does the average kinetic energy of different gases differ when they are at the same temperature?

How does the average kinetic energy of different gases differ when they are at the same temperature?

How does the average kinetic energy of different gases differ when they are at the same temperature?

*$JB$*   542   2 Replies

AndreVictor

As a result of the Coriolis effect in the northern hemisphere, winds are deflected:?

As a result of the Coriolis effect in the northern hemisphere, winds are deflected:?

As a result of the Coriolis effect in the northern hemisphere, winds are deflected:
A) at a 90° angle from the original direction.
B) to the right of the original direction.
C) to the left of the original direction.
D) at a 45° angle form the origina

003200222   647   1 Reply

bolbol

Calculate the magnitude of the torque on the nut?

Calculate the magnitude of the torque on the nut?

Hey guys, I have this question and I don't really understand how I should do it. heres the question:

A mechanic pushes with a force of 83 N perpendicular to a wrench at  apoint 22 cm from the nut. Calculate the magniute of the torque on the nut.

007   490   1 Reply

SmokeyV4L

How to calculate the torque required for tightening & loosening the lid from a jar?

How to calculate the torque required for tightening & loosening the lid from a jar?

It has a o-ring & sq. threads too.

007305jose   562   1 Reply

cloveb

A charged particle is travelling west through a downward magnetic field and it e

A charged particle is travelling west through a downward magnetic field and it e

A charged particle is travelling west through a downward magnetic field and it experiences a magnetic force directed to the north.  Using the appropriate hand rule, determine if the charge is negative or positive.  Explain all finger direct

009   767   2 Replies

doubleu

how to calculate the relative angle of a composite shaft given only one torque?

how to calculate the relative angle of a composite shaft given only one torque?

Given a composite shaft with a steel core and a brass jacket.
Torque = 5kip.in
L = 6ft
D(outer) = 0.8 in.
d(inner) = 0.6 in.
...|----------- 6ft --------|
..._______________
..( )______________)
...A.......................B

how to get the relative

0248   401   1 Reply

illculayter

Due to inertia, perhaps a railroad train in motion should continue moving indefinitely when its ...

Due to inertia, perhaps a railroad train in motion should continue moving indefinitely when its ...

Due to inertia, perhaps a railroad train in motion should continue moving indefinitely when its engine is turned off. This is not observed because railroad trains
A) aren't massive enough.
B) are too heavy.
C) ride on straight tracks.
D) encounter op

083055   131   1 Reply

pkam

An object falls freely from rest on a planet where the acceleration due to gravity is 20 m/s2. After ...

An object falls freely from rest on a planet where the acceleration due to gravity is 20 m/s2. After ...

An object falls freely from rest on a planet where the acceleration due to gravity is 20 m/s2. After 5 seconds, the object will have a speed of
A) 5 m/s.
B) 10 m/s.
C) 20 m/s.
D) 50 m/s.
E) 100 m/s.

083055   98   1 Reply

fnce445

Nellie's weight and normal force usually have the same magnitude when she stands on a

Nellie's weight and normal force usually have the same magnitude when she stands on a

Nellie's weight and normal force usually have the same magnitude when she stands on a
A) horizontal surface.
B) inclined surface.
C) either a horizontal or inclined surface.

083055   544   2 Replies

Carsyn Cone

Which produces more force: driving into a very massive concrete wall with no "give," or having a ...

Which produces more force: driving into a very massive concrete wall with no "give," or having a ...

Which produces more force: driving into a very massive concrete wall with no "give," or having a head-on collision with an identical car moving toward you at the same speed?
A) car
B) wall
C) both the same
D) need more information

083055   188   1 Reply

Hammed1991

A softer landing occurs when an falling object bounces from a surface

A softer landing occurs when an falling object bounces from a surface

A softer landing occurs when an falling object bounces from a surface
A) in a extended time.
B) quickly.
C) either of these
D) neither of these

083055   53   1 Reply

leavemealone

Which task requires more work?

Which task requires more work?

Which task requires more work?
A) lifting the 50-kg sack 2 meters
B) lifting the 25-kg sack 4 meters
C) both require the same
D) need more information

083055   65   1 Reply

Bkalid

The power required to exert 4-N force over 3 meters in 2 seconds is

The power required to exert 4-N force over 3 meters in 2 seconds is

The power required to exert 4-N force over 3 meters in 2 seconds is
A) 4 W.
B) 6 W.
C) 8 W.
D) 12 W.
E) none of the above

083055   90   1 Reply

UnRaquel

All places on Earth would have high tides at the same instant if the

All places on Earth would have high tides at the same instant if the

All places on Earth would have high tides at the same instant if the
A) Moon did not revolve.
B) Moon did not rotate.
C) Sun did not revolve.
D) Sun did not rotate.
E) none of the above

083055   57   1 Reply

aaronF1234

The Early Bird communication satellite hovers over the same point on Earth's equator indefinitely, because

The Early Bird communication satellite hovers over the same point on Earth's equator indefinitely, because

The Early Bird communication satellite hovers over the same point on Earth's equator indefinitely, because
A) other forces than Earth's gravity act on it.
B) it pulls as hard on Earth as Earth pulls on it.
C) it is beyond the main pull of Earth gravi

083055   71   1 Reply

belledejour86

The conservation of energy applies to satellites in

The conservation of energy applies to satellites in

The conservation of energy applies to satellites in
A) circular orbit.
B) elliptical orbit.
C) both of these
D) neither of these

083055   84   1 Reply

g.selah

Stone slabs are stronger under

Stone slabs are stronger under

Stone slabs are stronger under
A) tension.
B) compression.
C) both of these
D) none of these

083055   94   1 Reply

JSifuentes17

Which geometrical shape has the least surface area for a given volume?

Which geometrical shape has the least surface area for a given volume?

Which geometrical shape has the least surface area for a given volume?
A) cube
B) pyramid
C) cylinder
D) sphere
E) none of the above

083055   64   1 Reply

Noochie

A large block of wood and a smaller block of iron on weighing scales both register 1 ton. Taking ...

A large block of wood and a smaller block of iron on weighing scales both register 1 ton. Taking ...

A large block of wood and a smaller block of iron on weighing scales both register 1 ton. Taking buoyancy of air into account, which has the greater mass?
A) wood
B) iron
C) both have the same mass.
D) need more information

083055   84   1 Reply

Carinasp

When you touch a hot potato with your finger, energy flows

When you touch a hot potato with your finger, energy flows

When you touch a hot potato with your finger, energy flows
A) from your finger to the potato.
B) from the potato to your finger.
C) actually, both ways.

083055   54   1 Reply

AaronReborn

Metals are good conductors of both heat and electricity due to

Metals are good conductors of both heat and electricity due to

Metals are good conductors of both heat and electricity due to
A) similar thermal and electrical conductive properties.
B) looseness of outer electrons in metal atoms.
C) relatively high densities of metals.
D) high elasticity of metals.
E) both tran

083055   92   1 Reply

mnk

A photovoltaic cell receives energy input by

A photovoltaic cell receives energy input by

A photovoltaic cell receives energy input by
A) conduction.
B) convection.
C) radiation.
D) all of the above

083055   92   1 Reply

Guest

A canteen that is wet on the outside results in water inside that is

A canteen that is wet on the outside results in water inside that is

A canteen that is wet on the outside results in water inside that is
A) warmer.
B) cooler.
C) both of these
D) neither of these

083055   105   1 Reply

Tomeau

The calories needed to change 10 grams of ice at 0C to steam at 100C is

The calories needed to change 10 grams of ice at 0C to steam at 100C is

The calories needed to change 10 grams of ice at 0C to steam at 100C is
A) 6200.
B) 6400.
C) 7200.
D) 8000.
E) none of the above

083055   92   1 Reply

Calyboo

If a 10C piece of iron is heated until it has twice as much internal energy, its temperature will be

If a 10C piece of iron is heated until it has twice as much internal energy, its temperature will be

If a 10C piece of iron is heated until it has twice as much internal energy, its temperature will be
A) 20C.
B) 273C.
C) 293C.
D) 566C.
E) none of the above

083055   245   3 Replies

Famwam

An uncharged pith ball is suspended by a nylon fiber. When a negatively-charged rubber rod is ...

An uncharged pith ball is suspended by a nylon fiber. When a negatively-charged rubber rod is ...

An uncharged pith ball is suspended by a nylon fiber. When a negatively-charged rubber rod is brought near the pith ball, without touching, the ball
A) becomes charged by induction.
B) becomes polarized.
C) is repelled by the rod.
D) is unaffected.
E

083055   69   1 Reply

mtv12

During a lightning strike you don't want to be inside a building framed with

During a lightning strike you don't want to be inside a building framed with

During a lightning strike you don't want to be inside a building framed with
A) steel.
B) iron.
C) aluminum.
D) wood.

083055   79   1 Reply

s0073123