Physics

If you walk toward a mirror at a certain speed, the relative speed between you and your image is

If you walk toward a mirror at a certain speed, the relative speed between you and your image is

If you walk toward a mirror at a certain speed, the relative speed between you and your image is
A) half your speed.
B) your speed.
C) twice your speed.
D) none of the above

Terabear   26   2 Replies

Terabear

A mass suspended from a spring bobs up and down one complete cycle every 2 s. Its period is

A mass suspended from a spring bobs up and down one complete cycle every 2 s. Its period is

A mass suspended from a spring bobs up and down one complete cycle every 2 s. Its period is
A) 0.5 s.
B) 1 s.
C) 2 s.
D) none of the above

Terabear   30   2 Replies

Terabear

The safety fuse in an electric circuit is properly connected in

The safety fuse in an electric circuit is properly connected in

The safety fuse in an electric circuit is properly connected in
A) series with the circuit.
B) parallel to the circuit.
C) either of these

Terabear   40   3 Replies

i.o.u.1galaxxxy

A red-hot piece of iron will cool slower in a

A red-hot piece of iron will cool slower in a

A red-hot piece of iron will cool slower in a
A) cold room.
B) warm room.
C) same in each

Terabear   25   2 Replies

Terabear

More disorder means

More disorder means

More disorder means
A) greater entropy.
B) no particular change in entropy.
C) less entropy.

Terabear   61   3 Replies

macimov

In a hydraulic-press operation, it is impossible for the

In a hydraulic-press operation, it is impossible for the

In a hydraulic-press operation, it is impossible for the
A) output displacement to exceed the input displacement.
B) force output to exceed the force input.
C) energy output to exceed the energy input.
D) output piston's speed to exceed the input

Terabear   19   2 Replies

Terabear

The exchange particles for the strong interaction are

The exchange particles for the strong interaction are

The exchange particles for the strong interaction are

▸  positrons

▸  quarks

▸  leptons

▸  gluons

▸  muons

teranine   60   1 Reply

awbradshaw

A rigid cylinder (15 cm radius, 15 cm height) contains nitrogen gas (N2) at standard temperature and ...

A rigid cylinder (15 cm radius, 15 cm height) contains nitrogen gas (N2) at standard temperature and ...

[html]A rigid cylinder (15 cm radius, 15 cm height) contains nitrogen gas (N2) at standard temperature and pressure (0 °C and 1 atm). What heat input is required to increase the average translational kinetic energy of the nitrogen molec

teranine   28   1 Reply

nikki24303

What are the dimensions of the diffusion constant?

What are the dimensions of the diffusion constant?

What are the dimensions of the diffusion constant?

▸ m/s3

▸ m3/s2

▸ m3/s

▸ m2/s

▸ m/s2

teranine   32   1 Reply

DPhoenix

You would like to use a simple water-filled barometer (an inverted tube in a container of water) to ...

You would like to use a simple water-filled barometer (an inverted tube in a container of water) to ...

[html]You would like to use a simple water-filled barometer (an inverted tube in a container of water) to measure the atmospheric pressure on a day when the pressure is 102.5 kPa. What would be the minimum height required for such a barometer to w

teranine   25   1 Reply

casinogurl

Consider the ratio of the surface area of a cube to its volume. What happens to this ratio if the ...

Consider the ratio of the surface area of a cube to its volume. What happens to this ratio if the ...

[html]Consider the ratio of the surface area of a cube to its volume. What happens to this ratio if the side length of the cube decreases by a factor of 2?

▸ Increases by a factor of 4

▸ Decreases by a factor of 4

▸ Increa

teranine   24   1 Reply

rpascua

A child ties a rock to a string and whirls it around in a horizontal circle.

A child ties a rock to a string and whirls it around in a horizontal circle.

A child ties a rock to a string and whirls it around in a horizontal circle. Assuming a 1.18m -long string making 30.0 (degree) angle below the horizontal, find the speed of the rock.

PART A
Express your answer with the appropriate un

teratoma   2364   2 Replies

wouldbe

Physic Mechanics/Kinetics

Physic Mechanics/Kinetics

An elevator undergoes constant upward acceleration, taking it from rest to 12.8 m/s in 4.0 s. An 78 kg man stands on a scale in the elevator

Part A (answered) need part B (below)
What does the scale read during the upward acceleration

teratoma   942   1 Reply

camillje

If an electron is accelerated from rest through a potential difference of 100 V, what is its de ...

If an electron is accelerated from rest through a potential difference of 100 V, what is its de ...

[html]If an electron is accelerated from rest through a potential difference of 100 V, what is its de Broglie wavelength?

▸ 2.55 × 10−9 m

▸ 1.23 × 10−10 m

▸ 0.529 × 10−10 m

▸ 8.67 ×

testipw   19   1 Reply

amandashimkus

Which of these statements is true for the image formed by a spherical mirror?

Which of these statements is true for the image formed by a spherical mirror?

[html]Which of these statements is true for the image formed by a spherical mirror?

▸ Real images are always inverted.

▸ Virtual images of real objects are always in front of the mirror.

▸ Virtual images of real objects are

testipw   21   1 Reply

niecey

A coin has been dropped inadvertently into a bucket full of cleaning fluid (n=1.13). The bottom of ...

A coin has been dropped inadvertently into a bucket full of cleaning fluid (n=1.13). The bottom of ...

[html]A coin has been dropped inadvertently into a bucket full of cleaning fluid (n=1.13). The bottom of the bucket is 15 cm below the surface. How far beneath the surface does the coin appear to be?

▸ 17.0 cm

▸ 13.3 cm

▸

testipw   23   1 Reply

Pmoch

Standing waves are produced by the superposition of two waves with

Standing waves are produced by the superposition of two waves with

[html]Standing waves are produced by the superposition of two waves with

▸ the same amplitude, frequency, and direction of propagation.

▸ the same amplitude, frequency, and opposite direction of propagation.

▸ the same ampl

testipw   53   1 Reply

realistpnoy

A worker lifts a heavy load using a two-pulley system as in the figure. If the tension in the rope ...

A worker lifts a heavy load using a two-pulley system as in the figure. If the tension in the rope ...

[html]A worker lifts a heavy load using a two-pulley system as in the figure. If the tension in the rope segment labeled A is 1450 N, what are the weight of the load and the force that the worker exerts on the rope, respectively?

testipw   19   1 Reply

tswinson3

If a reflected ray in air at an angle of reflection of 60 is totally polarized, what is the index of ...

If a reflected ray in air at an angle of reflection of 60 is totally polarized, what is the index of ...

[html]If a reflected ray in air at an angle of reflection of 60° is totally polarized, what is the index of refraction of the reflecting material?

▸ 1.50

▸ 2.00

▸ 1.73

▸ 1.15

▸ this angle is not possible for

texasmade2550   78   1 Reply

Gimor1220

A 300-turn coil of area 25 cm2 is placed in an 80 mT magnetic field. If the coil carries a current ...

A 300-turn coil of area 25 cm2 is placed in an 80 mT magnetic field. If the coil carries a current ...

[html]A 300-turn coil of area 25 cm2 is placed in an 80 mT magnetic field. If the coil carries a current of 3.3 A and if the normal to the area of the coil makes an angle of 20° with the direction of the magnetic field, what is the magn

texasmade2550   17   1 Reply

Hlh13

A 3.00 m organ pipe is open at both ends and contains air. The speed of sound in air is 331 m/s. ...

A 3.00 m organ pipe is open at both ends and contains air. The speed of sound in air is 331 m/s. ...

[html]A 3.00 m organ pipe is open at both ends and contains air. The speed of sound in air is 331 m/s. What is the frequency of the lowest frequency mode?

▸ 39.5 Hz

▸ 40.2 Hz

▸ 43.1 Hz

▸ 47.5 Hz

▸ 55.2 Hz

texasmade2550   23   1 Reply

IcerX2050

A 5.0 kg ball is traveling at 4.0 m/s and strikes a wall. The ball bounces off the wall with a ...

A 5.0 kg ball is traveling at 4.0 m/s and strikes a wall. The ball bounces off the wall with a ...

[html]A 5.0 kg ball is traveling at 4.0 m/s and strikes a wall. The ball bounces off the wall with a velocity of 4.0 m/s in the opposite direction. If the ball is in contact with the wall for 0.10 seconds, then the magnitude of the impulse on the

teyodani   26   1 Reply

astroasis

An airplane flies with a constant speed at an angle of 25 degrees above the horizontal, in a ...

An airplane flies with a constant speed at an angle of 25 degrees above the horizontal, in a ...

[html]An airplane flies with a constant speed at an angle of 25 degrees above the horizontal, in a straight line. Which statement below is not true?  

▸ The net force on the plane is zero.

▸ The lift is the same magnitude

teyodani   27   1 Reply

ydnam23

I need help on MasteringPhyisics Homework, Ch.3.

I need help on MasteringPhyisics Homework, Ch.3.

I need help on MasteringPhyisics Homework, Ch.3.
I need help with homework 3.13 and 3.28
Please, help.

Thai   2214   8 Replies

Bob Smith5

An ac series circuit consists of a voltage source of frequency f = 60 Hz and voltage amplitude V, a ...

An ac series circuit consists of a voltage source of frequency f = 60 Hz and voltage amplitude V, a ...

[html]An ac series circuit consists of a voltage source of frequency f = 60 Hz and voltage amplitude V, a resistor of resistance

thall031   140   1 Reply

edr

A child standing on a bridge throws a rock straight down. The rock leaves the child's hand at Which ...

A child standing on a bridge throws a rock straight down. The rock leaves the child's hand at Which ...

[html]A child standing on a bridge throws a rock straight down. The rock leaves the child's hand at

thall031   81   1 Reply

muchkinnn

A train starts from rest and accelerates uniformly, until it has traveled 5.6 km and acquired a ...

A train starts from rest and accelerates uniformly, until it has traveled 5.6 km and acquired a ...

[html]A train starts from rest and accelerates uniformly, until it has traveled 5.6 km and acquired a velocity of

thall031   118   1 Reply

UnRaquel

A horizontal 52-N force is needed to slide a box across a flat surface at a constant velocity of 3.5 ...

A horizontal 52-N force is needed to slide a box across a flat surface at a constant velocity of 3.5 ...

[html]A horizontal 52-N force is needed to slide a

thall031   84   1 Reply

tray5

The figure shows a pV diagram for 0.98 mol of ideal gas that undergoes the process 1 2. The gas ...

The figure shows a pV diagram for 0.98 mol of ideal gas that undergoes the process 1 2. The gas ...

[html]The figure shows a pV diagram for 0.98 mol of ideal gas that undergoes the process 1 → 2. The gas then undergoes an isochoric heating from point 2 until the pressure is restored to the value it had at po

thall031   164   1 Reply

squirrelpie

A sealed rigitd tank contains 30 moles of an ideal gas, at an initial temperature of The pressure of ...

A sealed rigitd tank contains 30 moles of an ideal gas, at an initial temperature of The pressure of ...

[html]A sealed rigitd tank contains 30 moles of an ideal gas, at an initial temperature of

thall031   74   1 Reply

epapenfus

An expansion process on an ideal diatomic ideal gas for which CV = 5/2 R has a linear path between ...

An expansion process on an ideal diatomic ideal gas for which CV = 5/2 R has a linear path between ...

[html]An expansion process on an ideal diatomic ideal gas for which CV = 5/2 R has a linear path between the initial and final

thall031   74   1 Reply

aaronF1234

On a frictionless horizontal surface, a 1.50-kg mass traveling at 3.50 m/s suddenly collides with ...

On a frictionless horizontal surface, a 1.50-kg mass traveling at 3.50 m/s suddenly collides with ...

[html]On a frictionless horizontal surface, a 1.50-kg mass traveling at 3.50 m/s suddenly collides with and sticks to a 3.00-kg mass that is initially at rest, as shown in the figure. This system then runs into an ideal spring of force constant (spri

thall031   90   1 Reply

tmendes

What the electric energy density at a point 1.0 cm from a proton? , , k = 1/40 = 9.0 109 N m2/C2)

What the electric energy density at a point 1.0 cm from a proton? , , k = 1/40 = 9.0 109 N m2/C2)

[html]What the electric energy density at a point 1.0 cm from a proton?

thall031   84   1 Reply

jhatch16

Point charges +4.00 C and +2.00 C are placed at the opposite corners of a rectangle as shown in the ...

Point charges +4.00 C and +2.00 C are placed at the opposite corners of a rectangle as shown in the ...

[html]Point charges +4.00 μC and +2.00 μC are placed at the opposite corners of a rectangle as shown in the figure. If these charges are released and are free to move with no friction, what is the maximum amount of kinetic energy they will gain? (

thall031   98   1 Reply

Bobby.s

If emf of the ideal battery is V = 4.0 V, what is the current through R6 for the circuit shown in the figure?

If emf of the ideal battery is V = 4.0 V, what is the current through R6 for the circuit shown in the figure?

[html]If emf of the ideal battery is V = 4.0 V, what is the current through R6 for the circuit shown in the figure?

thall031   251   1 Reply

mtv12

Three capacitors are connected as shown in the figure. What is the equivalent capacitance between ...

Three capacitors are connected as shown in the figure. What is the equivalent capacitance between ...

[html]Three capacitors are connected as shown in the figure. What is the equivalent capacitance between points A and B?

thall031   124   1 Reply

Ajumper1

The symbol for a certain isotope of radium is Ra. How many nucleons are there in the nucleus of this isotope?

The symbol for a certain isotope of radium is Ra. How many nucleons are there in the nucleus of this isotope?

[html]The symbol for a certain isotope of radium is

thall031   67   1 Reply

samanthajones10

Assuming equal rates of acceleration in both cases, how much longer would it take a car to stop if ...

Assuming equal rates of acceleration in both cases, how much longer would it take a car to stop if ...

[html]Assuming equal rates of acceleration in both cases, how much longer would it take a car to stop if braking from 56 mi/h than from 28 mi/h?

• 1.4 times as long

• 8 times as long

• 2 times as long

• 4 times as long

• the same in both cases[/

thall031   52   1 Reply

sanjidhaa

Which of the following graphs represent an object at rest? (There could be more than one correct choice.)

Which of the following graphs represent an object at rest? (There could be more than one correct choice.)

[html]Which of the following graphs represent an object at rest? (There could be more than one correct choice.)

thall031   59   1 Reply

Tomeau

If a star 100 light-years away explodes, the time for the gravitational waves to reach Earth is 100 ...

If a star 100 light-years away explodes, the time for the gravitational waves to reach Earth is 100 ...

If a star 100 light-years away explodes, the time for the gravitational waves to reach Earth is 100 years as measured from
A) any uniformly moving reference frame.
B) any accelerating reference frame.
C) any reference frame, accelerated or not.
D) th

thall031   60   1 Reply

samanthajones10