STT 1 What is the length of the hypotenuse of this triangle? ( 6 and 8 cm)

A 6 cm

b 8 cm

C 10 cm

D 12 cm

E 14 cm

b dropping ball.

c descending rocket

A is postive

B Is negative

C Could be either positive or negative

A 4 mph

B 3 mph

c 2 mph

D 1mph

A .43

B .0052

C .430

D 4.321 X 10^-10

A 26 cm

B 20 cm

C 17 cm

D 15 CM

A 1.0 mi

B 1.4 mi

C 1.6 mi

D 2.0 Mi

A Positive, positive

B positive negative

C negative positive

D Negative Negative

A Hockey puck

B cyclist braking to a stop

C a sprinter starting a race

D a ball bouncing off the wall

A an ice skater gliding across the ice

B An airplane braking to a stop after landing

C a car pulling away from a stop sign

D a pool ball bouncing off a cushion and reversing direction

A 2.0 km

B 3.0 km

C 3.6 km

D 5.0 km

A .60 M/S

B 1.0 M/S

C 1.6 M/S

D 6.0 M/S

E 10 M/S

A 23 Degrees

B 34 Degrees

C 56 degrees

D 90 degrees

A 8.3 min

B 13.4 min

C 21.7 min

D 30.0 Min

A 1.72 M

B 1.723 M

C

D

A 3.7 m

B 3.77 M

C 3.772 M

D 3.7720 M

A 1.67 X10^12 S

B 4.01 X 10^13 S

C 2.40 X 10^ 9 S

D 1.44 X 10^17 S

A 5.50 X 10^3 Kg/M^3

B 5.50 X 10^6 Kg/M^3

C 5.50 X 10^9 Kg/M^3

d 5.50 X 10^12 Kg/M^3

A 1.0 S

B 2.0 S

C 3.0 S

D 4.0 S

E 5.0 S

A >30 m/s

B 30 m/s

C 0m/s

D -30 m/s

E <-30m/s

A Goes from 0 M/S to 10 M/s in 5.0 S

B Goes from 0 M/S to 5.o m/s in 2.0 s

C Goes from 0 M/S to 20 m/s in 7.0 S

D Goes from 0 M/S to 3.0 M/s in 1 S

A 5.0 M

B 25 m

C 40 M

D 50 M

A andy

B betty

C carl

D all have traveled the same distance

A andy

B Betty

C Carl

A 300 m

B 600 M

C 900 M

D 1200 M

A 12 S

B 14 S

C 21 S

D 28 S

A 12 S

B 9.0 S

C 6.0 S

D 3.0 S

A 5 m/s

B 10 m/s

C 15 M/s

D 20 M/s

A northeast

B southeast

C southwest

D northwest

A inverse Tan ( CX/CY)

B Inverse Tan ( cx/IcyI)

c Inverse Tan (IcxI/I cyI)

dInverse Tan ( cy/cx)

eInverse Tan ( cy/IcxI)

fInverse Tan ( IcyI/IcxI)

A Height 4 cm Base 12 Cm

b Height 3 cm base 6 cm

C Height 2 cm Base 5 cm

D height 1m base 3

A 8.0 M/s

B 5.0 M/s

C 3.0 M/s

D 2.0 m/s

A <1 m

B 1m

C between 1 and 2 meters

D 2 m

E between 2 and 4 m

F 4 M

A ball 1

B ball 2

C both balls are in the air for the same amount of time

A A+B+C

B B+A-C

C A-B+C

D B-A-C

A p+q

B P-Q

C q-p

D -Q-P

A the bakes

B Steering wheel

C gear Shift

D all the above

B e

C c

D a

E b

F a

Which vector best represents

A the cars velocity at position 1

B the car’s acceleration at position 1?

C the car’s velocity at position 2?

D the car’s acceleration at position 2?

E the car’s velocity at position 3?

F the car’s acceleration at position 3?

B a

c c

D b

A The ball’s velocity at position 2?

B the ball’s acceleration at position 2

C The ball’s velocity as position 3?

D The ball’s acceleration at position 3?

A 13.8 M/S

B 17.3 M/S

C 18.4 M/S

D 23.0 M/S

B D 160 M

A How long does it take for the ball to hit the wall?

A 1.3 S

B 3.3 S

C 4.4 S

B at what height h does the ball hit the wall

A 39 m

b 47 m

C 74 m

D 160 m

E 210 m

B C 100 m

A how long will it take it to take the car to hit the ground?

A 2.0 s

B 3.2 S

C 3.9 S

D 4.9 S

E 5.0 SB approx. how far from the base of the cliff will the car hit?

A 75 m

B 90 m

C 100 m

D 170m

E 280 m

A 15m

b 25 m

C 35 m

D 45 m

A 4.0 m

B 6.o m

C 8.0 m

D 16 m

E 24 m

A 1g

B 2g

C 3g

d 4g

e 5g

A to the left

B to the right

C upward

D downward

A there is no friction force

B there is a kinetic friction force directed up the slope

C there is a static friction directed up the slope

D there is a kinetic friction directed down the slope

E there is a static friction directed down the slope

A Right , right

B right left

C Left right

D left left

List all that apply

A gravity, acting downward

B The normal force, acting upward

C The force of the kick, acting in the direction of motion

D Friction acting opposite the direction of motion

E air resistance, acting opposite the direction of motion

A 1 m/s^2

B 2 m/s^2

C 4 m/s^2

D 8 m/s^2

E 16 m/s^2

A the car exerts a force on the truck, but the truck doesn’t exert a force on the car

B the car exerts a larger force on the truck than the truck exerts on the car

C the car exerts the same amount of force on the truck as the car exerts on the truck

D the truck exerts a larger force on the car than the car exerts on the truck

E the truck exerts a force on the car, but the car doesn’t exert a force on the truck.

A (1/4 a)

b (1/2)a

C a

d 2a

e 4a

A 10 kg

b 5.0 kg

c 2.5 kg

d 7.5 kg

A always up

b up then down

c always down

d down then up

A increase

b stay the same

C decrease

A always down the ramp

B up the ramp and then down the ramp

c always down the ramp

d down the ramp and then up the ramp

A immediately come to a stop

b continue moving at a constant speed for a while, then gradually slow down to a stop

C immediately change to a slower but constant speed

D immediately begin slowing down and eventually stop

A upward, upward

B upward, downward

C downward, upward

D downward, downward

A the force of dave of Thomas is larger than the force of Thomas on dave

B the force of thomas on dave is larger than the force of dave on thomas

C both forces have the same magnitude

D it depends on how hard dave pushes Thomas

A Block exerts a friction force on block A

B Block B exerts a friction force on block A, directed to the right

C Block B does not exert a friction force on block A

A T > 200 N

B T=200 N

C T<200 N

A more than your true weight

b less

c equal

d zero

A n>800 n

B n=800 n

c n<800 n

A F Q on H = H on Q= F Pon Q= F Q on P

B F Q on H = F H on Q> F P on Q = F Q on P

C F Q on H = F H on Q , F P on W = F Q on P

D F H on Q= F H on P > F P on Q

A up the ramp

B down the ramp

C the friction force is 0

D There’s not enough information to tell

A 9.5 N

B 15N

C 20 N

D 26 n

e 30 N

A B, 790 N

B D 790 N

A what force does the ceiling exert on you?

A 10 N

B 100 N

C 690 N

D 790 N

E 980 NB What force does the floor exert on you?

A 10 N

B 100 N

C 690 N

D 790 N

E 980 N

B, D 43 N

A What is the dogs magnitude of the normal force of the elevator floor on the dog?

A 34 N

B 43 N

C 49 N

D 55 N

E 74 NB What is the magnitude of the force on the dog on the elevator floor?

A 4.2 N

B 49 N

C 55 N

D 43 N

E 74 N

B B 5.4 M/s

A. What is the northward component of the puck’s velocity?

A .50 M/s

B 2.0 M/s

C 3.0 M/s

D 4.0 m/s

E 4.5 M/s

B What is the speed of the puck?

A 4.9 M/s

B 5.4 M/s

C 6.2 M/s

D 7.5 M/s

E 11 M/s

A 0 N

B 400 N

C 500 N

D 600 N

A 4.9 KG

B 6.1 KG

C 7.9 KG

D 9.8 KG

E 12 kg

A 18 N

B 60 N

C 180 N

D 600 N

A .20 M

B .68 M

C 1.0 M

D 6.6 M

A .5

B .7

C .9

D 1.0

A 230 M

B 300 M

C 450 M

D 680 M

A directed up

B directed down

C directed left

d directed right

e Zero

A N > W

B N<W

C N=W

D We cant tell about n without knowing W

A increasing the mass of the satellite

B increasing the height of the satellite about the surface

C increasing the value of G

A a month gets longer

B A month gets shorter

C the length if a month stays the same

A 1.5 N

B 3.0 N

C 12 N

D 24 N

A 6000 N

B 15,000 N

C 18,000 N

D 24,000 N

E 30,000 N

A 7 N

B 63 N

C 130 N

D 260 N

A 3 s

B 20 S

C 28 s

D 32 S

A t/4

B 2t

c 4t

D 16 T

A greater than that for an earth satellite

B the same as that for an earth satellite

C less than that for an earth satellite.

A 2/9 g

B 2/3 g

c 3/4 g

d 4/3 g

A. 2.5 m/s^2

B 5.0 M/s^2

C 10 M/s^2

D 20 M/s^2

A more than 27.3 days

B 27.3 days

C less than 27.3 days

A t2=1/2 T1

B T2= 2T1

c t2= 4t1

D T2=8T1

a 1.3 m/s

B 2.6 m/s

C 3.9 m/s

D 5.2 m/s

b constant but not zero

c constant but not zero

D zero

e zero

A velocity

B angular velocity

C centripetal acceleration

D angular acceleration

E tangential acceleration

A 2.7 X 10^-5 kg X m^2

B 5.4 X 10^-5 kg X m^2

C 1.1 X 10^-4 kg X m^2

D 2.2 X 10^-4 kg X m^2

A 2

B 4

C 8

D 16

A Rod 1

B Rod 2

A. put the end of the handle in your palm , with the barrel on top

B. Put the end of the barrel in your palm with the handle up

C. The bat will be equally easy to balance in either configuration

A pi/ 2 rad

B pi rad

C 5 pi/ 2 rad

D -3pi/2 Rad

7.26 C 300 m/s^2

7.27 D 15 m/s

A 2 rad/s

B 6 rad/s

C 9 rad/s

D 20 rad/s7.26 The skaters arms are fully extended during the jump. What is the approx. centripetal acceleration of the skater’s hand?

A 10 m/s^2

B 30 M/s^2

C 300 M/s^2

D 450 M/s^27.27 What is the approx. speed of the skater’s hand?

A 1m/s

B 3 m/s

C 9 m/s

D 15 m/s

A increase, increase

B not chance, increase

C not change, not change

D not change, decrease

E decrease, not change

F decrease, decrease

A 4 N to the left

B 4 N to the right

C 8 N to the left

D 8 N to the right

E 16 n to the left

D 16 N to the right

A 5 cm

B 10 cm

C 15 cm

D 20 cm

A .5 mm

B 1 mm

C 2 mm

D 3 mm

E 4 mm

A will rotate counterclockwise

B is in static EQ

C will rotate clockwise

A .3 m

B .6

C .9 m

D 1.2 m

A 7 N

B 14 N

C 20 N

D 28 N

8.18 C, 165 lb

8.19 b, .8 m

A 65 lb

B 75 lb

C 100 lb

C 165 lb8.19 For the student in figure 8.18 approx. how far from her feet is the center of gravity?

A .6 M

B .8 M

C 1.0 m

D 1.2 m

8.21 B, 160 N

8.22 A, 1.0 mm

((Knee picture ))

8.20 How much force must the tendon exert to keep the leg in this position?

A 40 N

B 200 N

C 400 N

D 1000 N

8.21 As you hold your leg in this position, the upper leg exerts a force on the lower leg at the knee joint. What is the direction of this force?

A 40 N

B 160 N

C 200 N

D 240 N

8.22 What is the magnitude of the force of the upper leg on the lower leg at the knee joint?

A 1.0 mm

B 1.4 mm

C 2.0 mm

D 4.0 mm

A 1.0 mm

B 1.4 mm

C 2.0 mm

D 4.0 mm

A 4.0 cm

B 8.0 cm

C 14 cm

D 15 cm

A 3.0 mm

B 6.3 mm

C 9.3 mm

D 13 mm

A greater than the force of the hammer on the nail

B less than the force of the hammer on the nail

C equal to the force of the hammer on the nail

D zero

A force A

B Force B

C both forces deliver the same impulse

A -30 kgX m/s

B -20 kgX m/s

C -10 kgX m/s

D 10 kgX m/s

E 20 kgX m/s

F 30 kgX m/s

A the clay ball receives a greater impulse because it sticks

B the rubber ball receives a greater impulse because it bounces.

C. The receive equal impulses because they have equal momenta

D. Neither receives an impulse because the wall doesn’t move.

A move to the right as shown

B move to the left

C are at rest

A greater than Wi

B less than Wi

C Equal to Wi

A 200 N

B 1000 N

C 2000 N

D 10,000 N

A .67 kg

B 2.0 kg

C 1.7 kg

D 1.0 kg

A vi/2

B 4vi/5

c vi

d 5vi/4

e 2Vi

A West

B North

C Between north and west

D between north and east

E between south and west

A 2.0 M/s

B 4.0 m/s

C 5.0 m/s

D 7.5 m/s

E 10 m/s

A 50 rpm

B 40 rpm

C 25 rpm

D 20 rpm

E 10 rpm

A 10 m/s

B 20 m/s

C 30 m/s

D 40 m/s

A Ug ->K

B K -> Ug

C W-> K

D Ug -> Eth

E K->Eth

A the 10 N force

B 8 N force

C 6 N force

D they all do the same amount of work

A -4 J

B -2 J

C 2 J

D 4 J

A 1.4 M

B 2.0 M

C 3.0 M

D 4.0 M

A Slide A

B Slide B

C slide C

D her speed is the same at the bottom of all three slides

A yes

B no, because momentum is not conserved

C no, because energy is not conserved

D no, because neither momentum nor energy is conserved.

A kinetic energy

b potential energy

c thermal energy

A 11 m/s

B 15 m/s

C 21 m/s

D 25 m/s

A you did more work, but both of you expended the same amount of power

B you did more work and expended more power

C both of you did equal work, but you expended more power

D both of you did equal work, but you expended less power

A 100 W

B 200 W

C 300 W

D 400 W

A 2.0 cm

B 2.8 cm

C 4.0 cm

D 5.6 cm

E 8.0 cm

A 7.7 m/s

B 4.4 m/s

C 3.6 m/s

D 3.1 m/s

A h/4

B h/2

C 3h/4

D 2h

Christina throws a javelin in to the air. As she propel it forward from rest, she does 270 J of work on it. at its highest point, its gravitational potential energy has increased by 70 J. What is the javelines kinetic energy at this point?

A 270 j

B 240 J

c 200 j

d -200 j

e -340 j

A crane 1

b crane 2

C both use the same efficiency

A t1>t2

B t1=t2

C t1<t2

A Q>0

B Q=0

C Q<0

A increase TH

D Increase TC

A Increase TH

B Increase TC

C Decrease TH

D Decrease TC

A Increasing the temperature inside the fridge

D decreasing the temp of the kitchen

A Increasing the temperature inside the fridge

B increasing the temp of the kitchen

C decreasing the tmp inside the fridge

D decreasing the temp of the kitchen

A an electric heater raised the temp ofa cup of water by 20C

B a ball rolls up a ramp, decreasing in speed as it rolls higher

C A basketball is dropped from 2 m and bounces until it comes to rest

D the sun shines on a black surface and warms it

A. The energy used and the power are the same for both.

B. The energy used while walking is greater, the power while running is greater

C. The energy used while runner is greater, the power while running is greater.

D. The energy used is the same for both segments, the power while running is greater.

A. Chemical Energy is being transformed into thermal energy

B. Chemical Energy is being transformed into Kinetic energy

C. Chemical Energy is being transformed to kinetic energy and thermal energy

D. Chemical Energy and thermal energy are being transformed to kinetic energy

A. The total kinetic energy of the air is increasing and the average total kinetic energy of the molecules is decreasing

B. The total kinetic energy of the air is increasing and the average kinetic energy of the molecules is increasing.

C.The total kinetic energy of the air is decreasing and the average kinetic energy of the molecules is decreasing.

D. The total kinetic energy of the air is decreasing and the average kinetic energy of the molecules is increasing.

A. Gas 1

B. Gas 2

C. Both gasses have the same increase in thermal energy.

A. The first law of thermodynamics

B. The second law of thermodynamics

C. Both the second and third law of thermo dynamics

A. It is in violation of the second law of thermodynamics

B. It is not a violation of the second law of thermodynamics because refrigerators can have efficiency of 100%.

C. It is not a violation of the second law of thermodynamics because of the the second law does not apply to refrigerators.

D. The second law of thermo dynamics applies in this situation, but it is not violated because the energy did not spontaneously go from cold to hot.

A. 100 MJ

B. 90 MJ

C. 60 MJ

D. 40 MJ

A. .89 J

B. .87 J

C. .13 J

D. .11 J

A blender does 5000 J of work on the food in its bowl. During the time the blender runs, 2000J of heat is transferred from the warm food to the cooler environment. What is the change in the thermal energy of the food?

a +2000J

b+3000 J

c + 7000 J

d -2000J

e-3000J

A helium

B neon

C they have the same number of atoms

B thermal energy of the gas

A A the rms of speed of the gas atom

B thermal energy of the gas

C the pressure of the gas

D the number of molecules in a gas

a 1/4

b 1/2

c a ( no change)

D 2

e 4

f there is not enough information to decide

A increase the temp of the ring and the rod

B decrease the temp of the ring and the rod

A the specific heat of water is larger than that of steam

B the specific heat of water is smaller than that of steam

C The specific heat of water is equal to that of steam

D the slope of the graph is not related to the specific heat

A 0kg

B <1 kg C 1 kg D >1 kg

A <50 C B 50 C C >50 C

a conduction

b convection

c radiation

d evaporation

A Less than 35 PSI

B. Equal to 35 PSI

C. Greater than 35 PSI

A decreases by a factor of 4

B. Decreases by a factor of 2

C. Stays the same

D. Increases by a factor of 2

E. Increases by a factor of 4

A. Does not change

B. Increases by a factor of less than 2.

C. Increases by a factor of 2

E. Increases by a factor of more than 2.

A. It decreases to one-fourth its initial value.

B. It decreases to one-half its initial value.

C. It stays the same

D. It increases to twice its initial value.

A. Does not change.

B. Increases by a factor less than 2.

C. Increases by a factor of 2.

D. Increases by a factor of more than 2.

A. Cause you to underestimate the specific heat.

B> Cause you to overestimate the specific heat

C. Not affect your calculation of specific heat

A. 72 G

B. 140 G

C. 720 G

D. 1.4 KG

Three identical beakers each hold 1000 g of water at 20C 100g of liquid water at 0C is added to the first beaker, 100 g of ice at 0C is added to the second beaker, and the third beaker gets 100G of aluminum at 0C. The contents of which container end up at the lowest final temperature?

A. The first Beaker.

B. The second Beaker

C. The third beaker

D. All end up at the same temperature

A. An ice-water mixture at 0C

B. Water at a temperature between 0C and 50C

C. Water at 50C

D. Water at a temperature between 50C and 100C

E. A water- steam mixture at 100C

A. 50 S

B. 100 S

C. 150 S

D 200 S

A. .012 KG

B. .057 KG

C. .12 KG

D. 1.0 KG

A Steam is hotter than water

B. Water is transferred to the skin as steam condenses

C. Steam has a higher specific heat than water

D. Evaporation of liquid on the skin causes cooling

A equal to the weight of one book

B less than the weight of one book

C greater than the weight of one book

A d1>d2>d3

B D1<d3 d3

E D1=d2<d3

A fall

B stay the same

C rise, causing the water to spill

IS the flow direction in or out?

A. the copper block will fall, the Aluminum block will rise

B the aluminum block will fall and the copper block will rise

C nothing will change

D both blocks will rise

A Mass A is greater

B mass b is greater

C mass A and Mass B are the same

A .3 M

B 1 M

C 3 M

D 10 M

Float

B sink

C have neutral buoyancy

A greater than the weight of the block

B less than ”

C Equal to

A 250 Kg/m^3

B 750

C 1000

D 1250 Kg/M^3

A .01 m/s

B .1 m/s

C 1 m/s

D 10 m/s

A 850 pa

B 3400 pa

C 9300 pa

D 12,700 pa

E 13,500 pA

A 1900 pa

B 2700 pa

C 4200 pa

C 5800 pa

E 7300 pa

B. 10 CM

C. 1.6 HZ

C. The frequency would stay the same.

A. 5.0 Cm

B. 10 CM

C. 20 CM

D 40 CMFor the data, what is the frequency of the oscillation?

A .10 Hz

B .62 HZ

C. 1.6 HZ

D. 10Hz2C Suppose this experiment were done on the moon, where the free fall acceleration is approx. 1/16 of that on the earth. How would this change the frequency of the oscillation?

A. The frequency would decrease

B. The frequency would increase

C. The frequency would stay the same.

B-C

C -B

D-B

E-B

A 12 S

B 24 S

C 36 S

D 48 S

E 50SB What is the amplitude of the oscillation?

a 1.0 cm

b 2.5 cm

c. 4.5 cm

D 5.0 cm

E 9.0 CmC What is the position of the mass at T = 30

a-4.5 cm

B -2.5 cm

C 0.0 cm

D 4.5 cm

E 30 cm

D when is the first thime the velocity of the mass is at zero?

a 0s

b 2s

c 8s

d 10s

e 13s

E At which of these times does the kinetic energy have its max. value?

a 0s

b 8s

c 13s

d 26s

e 30s

x=(0.350 m) cos(15.0t) with T measured in seconds

A) What is the amplitude of the ball’s motion?

A .175 m

B .350 m

c .700 m

d 7.50 m

E 15.0 mB) What is the frequency of the ball’s motion?

A .35 hz

B 2.39 hz

c 5.44 hz

d 6.28 hz

E 15.0 hzC) what is the value of mass m?

A .45 kg

b .89 kg

c 1.54 kg

d 3.76 kg

E 6.33 kg

D what is the total mechanic energy of the oscillator?

a 1.65 J

B 3.28 J

C 6.73 J

D 10.1 j

E 12.2 J

E What is the balls maximum speed?

A .35 m/s

B 1.76 m/s

C 2.60 m/s

D 3.88 m/s

E 5.35 m/s

A greater than 1.0 hz

B equal to 1.0 hz

C less than 1.o HZ

A frequency will increase

B The frequency will stay the same

C The fluency will decrease

A 4.7 m

B 6.3 m

C 7.5m

D 8.7 m

A loud music with a mix of different frequencies

B very loud, high-frequency sound

C very loud, low-frequency sound

a 14 cm

B 16 cm

C 20 cm

d 24 cm

A f1f2

A .5 n

B 1.0 n

C 1.5 n

D 2.0 N

A first be at it’s maximum negative displacement

B First have its maximum speed

C first have it’s maximum velocity

D first have its maximum positive acceleration?

A the clock will fun fast; the dial will be ahead of the actual time

B the clock will keep perfect time

C the clock will run slow; the dial will be behind the actual time

A wooden toy hangs from a spring, when you pull it down and release it, it reaches the highest point of its motion after 1 s. What is the frequency of its oscillation?

a 2.0 hz

b 1.5 hz

c 1.0 hz

d .5 hz

E stretch the string tighter to increase the tension

A move your hand up and down more quickly as you generate the wave

B move your hand up and down a greater distance as you generate the wave

C use a heavier string of he same length under the same tension

D use a lighter string of the same length under the same tension

E stretch the string tighter to increase the tension

F loosen the string to decrease the tension.

A infrared has a longer wavelength and higher frequency than ultraviolet

B infrared has a shorter wavelength and higher frequency than ultraviolet

C Infrared has a longer wavelength and lower frequency than ultraviolet

D Infared has a shorter wavelength and lower frequency than ultraviolet

A the plane wave

B the circular wave

C The spherical wave

a 70 db

b 60 dB

C 50dB

D 40dB

E 30dB

F 20dB

A F amy > F zach

B F amy = f zach

C F amy < f zach

MCQ 15.20 Denver, colorado has an oldies station that calls itself ” kool 105″ this means that they broadcast radio waves at a frequency of 105 MHz. Suppose that they decide to describe their station by its wave length in meters instead of by frequency, what name would they use now?

a Kool 0.35

b Kool 2.85

c Kool 3.5

D Kool 285

A 1.33 X10^3 hz

B 7.50 X 10^12 HZ

C 1.33 X 10^13 Hz

D 7.50 X 10^14 Hz

A .29 mm

B 1.4 cm

C 6.3 Cm

D 17 cm

A .60 cm/s

B 6.4 cm/s

C 15 cm/s

D 160 cm/s

15.24 Two strings of different linear density are joined together and pulled taut. a sinusoidal wave on the string is traveling to the right, as shown in figure 15.24. When the eave goes across the boundary from string 1 to string 2, the frequency is unchanged, what happens to the velocity?

A velocity increases

B velocity stays the same

C velocity decreases

A it moves from left to right and passes you at t=2s

B it moves from right to left and passes you at t=2s

C it moves toward you but doesn’t reach you. It then reverses direction at t=2s

D it moves away from you until t=2s it then reverses direction and moves toward you, but doesn’t reach you.

a 4.0 m

b 3.0 m

c 2.0 m

d 1.0 m

A 6.0 M

B 4.0 M

C 3.0 M

D 2.0 M

E 1.0 M

A M=6 .67 m

B M= 6 .80 m

C M= 5 .80m

D M=5 1.0 m

E M= 4 .80m

F m= 4 1.0m

A 50 hz

B 100 Hz

C 150 Hz

D 200 Hz

E 300 Hz

A the fundamental frequency of your vocal cords has changed

B the frequencies of the harmonics of your vocal cords has changed

C The pattern of resonance frequencies of your vocal tract has changed, thus changing the formants

A 605 hz

b 607 hz

C 613 hz

D 616 hz

E Either A or D

F Either B or C

Refer to the graph from the book

At T=1s what is the displacement y of the string at x=7cm?

A -1 cm

B 0mm

C .5 mm

D 1mm

E 2 mm16.19

At X=3cm what is the earliest time that y wil equal 2 mm?

a.5 s

B .7 s

c 1.0 s

d 1.5 s

e 2.5 s16.20 At t=1.5 s what is the value of y at x=10 cm

a -2.0 mm

b -1.0 mm

c -.5 mm

d 0mm

e 1.0 mm

A a

B 2a

C 0

D not enough information to decide

A 80 hz

B 100 hz

C 120 hz

D 180 hz

A greater than 384

B 384 hz

C less than 384 hz

16.24 resonances of the ear canal lead to increased sensitivity of hearing, as we’ve seen. Dogs have a much larger ear canal- 5.2 cm- than humans. What are the two lowest frequencies at which dogs have an increased in sensitivity? The speed of sound in the warm air of the ear is 350 m/s

A 1700 hz, 3400 hz

B 1700 hz, 5100 hz

C 3400, 6800 hz

3400, 10,200hz

A 10 m/s

B 20m.s

C 30 m/s

D 40 m/s

A 350 hz

B 440 hz

C 490 hz

D 550 hz