The bohr Effect states that the lower the ph,?

Answers

Answer 1

Answer:

Explanation:

The Bohr effect describes how low pH (acidity) lowers the affinity of hemoglobin for oxygen, making hemoglobin more likely to offload oxygen in areas of low pH, which for reasons I'll get into, tissues in need of oxygen tend to have.


Related Questions

Different nutrients play different roles in our bodies. Which is the energy-storing nutrient?
O carbohydrates
O minerals
O proteins
O fats

Answers

Answer:

D. Fats

Explanation:

they are the long term energy storing nutrient carbohydrates are a quick way for energy minerals dont contain any energy and neither do proteins

fats

Explanation:

it is nutrient kept in the body

A walkway suspended across a hotel lobby is supported at numerous points along its edges by a vertical cable above each point and a vertical column underneath. The steel cable is 1.27cm in diameter and is 5.75m long before loading. The aluminum column is a hollow cylinder with an inside diameter of 16.14cm, and an unloaded length of 3.25m. When the walkway exerts a loa force of 8500N on one of the support points, through what distance does the point move down?

Answers

Answer:

[tex]\triangle I=8.60*10^{-4}m[/tex]

Explanation:

From the question we are told that:

Diameter [tex]d=1.27cm[/tex]

Length [tex]l=5.75m[/tex]

Diameter of aluminum column [tex]d_a=16.14cm[/tex]

Length of aluminum column [tex]l_a=3.25m[/tex]

Load Force [tex]F=8500N[/tex]

Generally the equation for Young modulus is mathematically given by

[tex]\gamma=\frac{FL}{A \triangle L}[/tex]

Given the The load force

[tex]F=\frac{Y_aA_a\triangle I}{L_a}+\frac{YA \triangle I}{L}[/tex]

[tex]\triangle I=\frac{F}{\frac{Y_aA_a}{L_a}}+\frac{YA}{L}[/tex]

[tex]\triangle I=\frac{8500N}{ \frac{7*10^{10} \pi (0.1624^2-0.1614^2)}{4*3.15}+ \frac{20*10^10 \pi (0.0127^2)}{4(5.75)}}[/tex]

[tex]\triangle I=8.60*10^{-4}m[/tex]

slader At a carnival, you can try to ring a bell by striking a target with a 10.8-kg hammer. In response, a 0.408-kg metal piece is sent upward toward the bell, which is 4.23 m above. Suppose that 18.8 percent of the hammer's kinetic energy is used to do the work of sending the metal piece upward. How fast must the hammer be moving when it strikes the target so that the bell just barely rings

Answers

Answer:

The hammer must be moving at a speed of approximately 4.082 meters per second.

Explanation:

According to the statement and based on Principle of Energy Conservation, change in gravitational potential energy experimented by the metal piece ([tex]U_{g,o}[/tex]), in joules, must be equal to 18.8 percent of the translational kinetic energy of the hammer ([tex]K_{h}[/tex]), in joules.

[tex]U_{g, o} = 0.188\cdot K_{h}[/tex] (1)

By definitions of gravitational potential and translational kinetic energies, we expand (1):

[tex]m_{o}\cdot g\cdot h = 0.188\cdot \left(\frac{1}{2}\cdot m_{h}\cdot v^{2}\right)[/tex] (2)

Where:

[tex]m_{o}[/tex] - Mass of the metal piece, in kilograms.

[tex]g[/tex] - Gravitational acceleration, in meters per square second.

[tex]h[/tex] - Distance travelled by the metal piece, in meters.

[tex]m_{h}[/tex] - Mass of the hammer, in kilograms.

[tex]v[/tex] - Initial speed of the hammer, in meters per second.

If we know that [tex]m_{o} = 0.408\,kg[/tex], [tex]g = 9.807\,\frac{m}{s^{2}}[/tex], [tex]h = 4.23\,m[/tex] and [tex]m_{h} = 10.8\,kg[/tex], then the initial speed of the hammer is:

[tex]m_{o}\cdot g\cdot h = 0.188\cdot \left(\frac{1}{2}\cdot m_{h}\cdot v^{2}\right)[/tex]

[tex]10.638\cdot m_{o}\cdot g \cdot h = m_{h}\cdot v^{2}[/tex]

[tex]v = 3.261\cdot \sqrt{\frac {m_{o}\cdot g \cdot h}{m_{h}}}[/tex]

[tex]v = 3.261\cdot \sqrt{\frac{(0.408\,kg)\cdot \left(9.807\,\frac{m}{s^{2}} \right)\cdot (4.23\,m)}{10.8\,kg} }[/tex]

[tex]v \approx 4.082\,\frac{m}{s}[/tex]

The hammer must be moving at a speed of approximately 4.082 meters per second.

which best describes how air moves during convection?

a. cool air warms as it mixes with denser air
b. warm air cools as it mixes with cooler, denser air
c. warm air is displaced by cooler denser air

Answers

a. cool air warms as it mixes with denser air

Explanation:

c. warm air is displaced by cooler denser air

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một vật m=1kg có động lượng bằng 10kg.m/s. động năng của vật là

Answers

Trong cơ học cổ điển, động năng (KE) bằng một nửa khối lượng của một vật (1/2 * m) nhân với bình phương vận tốc. Ví dụ, nếu một vật có khối lượng 10 kg (m = 10 kg) đang chuyển động với vận tốc 5 mét trên giây (v = 5 m / s) thì động năng bằng 125 Joules, hoặc (1 / 2 * 10 kg) * 5 m / s2.

an object 5 cm in size is placed at 30 cm in front of a concave mirror of focal length 45 CM at what distance from the mirror should a screen be placed in order to obtain a shop image find the magnification size and nature of the image​

Answers

Answer: Given: h₀=5cm

p=30cm

hi

f=45cm

require: q=?

hi=?

formulas:

1/f=1/p+1/q

hi/h₀=q/p

calculations:1/q=1/f-1/p

1/q=1/45-1/30

1/q=0.022=0.033

1/q=  =    -0.011

q=1/-0.011

q=   -90.91cm

hi=p × h₀/q

hi=30ₓ5/-90.91

hi=150/-90.91

hi= -1.65cm

image is virtual , erect and diminished

please mark as brainliest plzzzzzzzzzz

A pendulum of mass 18 kg is released from rest at some height, as shown by
point A in the image below. At the bottom of its arc at point B, it is traveling at
a speed of 17 m/s. What is the approximate amount of energy that has been
lost due to friction and air resistance? (Recall that a=98 m/s2

Answers

By the work-energy theorem, the total work done on the mass as it swings is

W = ∆K = 1/2 (18 kg) (17 m/s)² = 153 J

No work is done by the tension in the string, since it's directed perpendicular to the mass at every point in the arc. Similarly, the component of the mass's weight mg pointing perpendicular to the arc also performs no work.

If we ignore friction/drag for the moment, the only remaining force is the parallel component of weight, which performs mgh = (176.4 N) h of work, where h is the vertical distance between points A and B.

Now, if w is the amount of work done by friction/air resistance, then

(176.4 N) h - w = 153 J

If you know the starting height h, then you can solve for w.

Can someone help me with this Physics question please?

Q. The half-life of tritium (hydrogen-3) is 12.3 years. If 48.0mg of tritium is released from a nuclear power plant during the course of a mishap, what mass of the sample will remain after 49.2 years?​

Answers

Answer:

Explanation:

The formula for this, the easy one, is

[tex]N=N_0(\frac{1}{2})^{\frac{t}{H}[/tex] where No is the initial amount of the element, t is the time in years, and H is the half life. Filling in:

[tex]N=48.0(\frac{1}{2})^{\frac{49.2}{12.3}[/tex] and simplifying a bit:

[tex]N=48.0(.5)^4[/tex] and

N = 48.0(.0625) so

N = 3 mg left after 12.3 years

How many half-lifes is 49.2 years ?

(49.2 years) / (12.3 years per half-life)  =  4 half-lifes.

In 4 half-lifes, (1/2) · (1/2) · (1/2) · (1/2) of the original sample remains.

That's (1/2⁴) or (1/16) of the original.

(1/16) of 48.0 mg  =  3 mg .

=======================

Step-by-step:

== Start with 48 mg .

== After one half-life, 24 mg remains.

== Then, after the second half-life, 12 mg remains.

== Then, after the third half-life, 6 mg remains.

== Then, after the fourth half-life, 3 mg remains.

which is part of the convection cycle in earths atmosphere?

a. hot, denser air rises
b. cold, denser air rises
c. hot, less-dense air rises
d. cold, less-dense air falls

Answers

I believe it’s C. hot, less-dense air rises

I hope this helps !!!!!!!!

A ball is launched horizontally at 150 m/s from a cliff. What is its vertical speed after 3 seconds?
A. 150 m/s
B. 50 m/s
C. 0 m/s
D. 30 m/s

Answers

Answer:

v_f = 30 m/s

Explanation:

v_f = v_I + a*t

v_f = 0m/s + (9.81m/s²)*(3s)

v_f = 29.43m/s

v_f = 30 m/s

Since the object is being launched horizontally off the cliff the only vertical force acting on the ball is gravity which is an acceleration of 9.81m/s². So we have all the flowing information to use the the kinematic equation: v_f = v_I + a*t.

write the relation of m² with its a multiple​

Answers

Explanation:

The square meter is the SI-derived unit of area. It has a symbol m² (33A1 in Unicode). It is defined as the area of a square whose sides measure exactly one metre.

The engine starter and a headlight of a car are connected in parallel to the 12.0-V car battery. In this situation, the headlight operates at 38 W and the engine starter operates at 2.40 kW. If the headlight and starter were then rewired to be in series with each other, what total power would they consume when connected to the 12.0-V battery

Answers

Answer:

The total power they will consume in series is approximately 2.257 W

Explanation:

The connection arrangement of the headlight and the engine starter = Parallel to the battery

The voltage of the battery, V = 12.0 V

The power at which the headlight operates in parallel, [tex]P_{headlight}[/tex] = 38 W

The power at which the kick starter operates in parallel, [tex]P_{kick \ starter}[/tex] = 2.40 kW

We have;

P = V²/R

Where;

R = The resistance

V = The voltage = 12 V (The voltage is the same in parallel circuit)

For the headlight, we have;

R₁ = V²/[tex]P_{headlight}[/tex]  = 12²/38 = 72/19

R₁ = 72/19 Ω

For the kick starter, we have;

R₂ = V²/[tex]P_{kick \ starter}[/tex] = 12²/2.4 = 60

R₂ = 60 Ω

When the headlight and kick starter are rewired to be in series, we have;

Total resistance, R = R₁ + R₂

Therefore;

R = ((72/19) + 60) Ω = (1212/19) Ω

The current flowing, I = V/R

∴ I = 12 V/(1212/19) Ω = (19/101) A

We note that power, P = I²R

In the series connection, we have;

[tex]P_{headlight}[/tex] = I² × R₁

∴ [tex]P_{headlight}[/tex] = ((19/101) A)² × 72/19 Ω = 1368/10201 W ≈ 0.134 W

The power at which the headlight operates in series, [tex]P_{headlight, S}[/tex] ≈ 0.134 W

[tex]P_{kick \ starter}[/tex] = ((19/101) A)² × 60 Ω = 21660/10201 W ≈ 2.123 W

The power at which the kick starter operates in series, [tex]P_{kick \ starter, S}[/tex] ≈ 2.123 W

The total power they will consume, [tex]P_{Total}[/tex] = [tex]P_{headlight, S}[/tex] + [tex]P_{kick \ starter, S}[/tex]

Therefore;

[tex]P_{Total}[/tex] ≈ 0.134 W + 2.123 W = 2.257 W

Why is a flower not a good blackbody radiator?

Answers

Answer:

A flower emits only visible light

A flower reflects much of the light that hits it

While standing at a crosswalk, you hear a frequency of 510 Hz from an approaching police car.
After the police car passes, its frequency is 460Hz. What is the speed of the police car? (speed of
sound = 340 m/s)

Answers

Answer:

v = 17.68 m/s

Explanation:

Given that,

While standing at a crosswalk, you hear a frequency of 510 Hz from an approaching police car.

After the police car passes, its frequency is 460Hz.

We need to find the speed of the police car.

The formula is as follows :

[tex]v=\dfrac{v_o(f-f')}{f+f'}[/tex]

Put all the values,

[tex]v=\dfrac{343(510-460)}{510+460}\\\\=17.68\ m/s[/tex]

So, the speed of the police car is 17.68 m/s.

how can mass be measured?

spring scale

balance

scale

bathroom scale

Answers

I believe it’s balance

Answer:

ballance

i just took the quiz

what is the source of energy​

Answers

Fossil Fuels is the largest source for energy

Hope this is what you were asking :)

Solid to gas and gas to solid on the basis of kinetic model.​

Answers

Explanation:

The kinetic molecular theory of matter states that: ... The average amount of empty space between molecules gets progressively larger as a sample of matter moves from the solid to the liquid and gas phases. There are attractive forces between atoms/molecules, and these become stronger as the particles move closer together.

Cuánto demorará un cuerpo en alcanzar su máxima altura, sabiendo que fue lanzado, verticalmente hacia arriba, con una velocidad cuyo valor fue de 90 m/s?

Answers

Answer:

The maximum height reached is 413.27 m.

Explanation:

How long will it take for a body to reach its maximum height, knowing that it was thrown, vertically upwards, with a velocity whose value was 90 m / s?

initial velocity , u = 90 m/s

gravity, g = 9.8 m/s^2

Let the maximum height is h.

At maximum height the velocity v = 0

Use third equation of motion

[tex]v^2 = u^2 - 2 gh\\\\0 = 90\times 90 - 2 \times 9.8 \times h\\\\h = 413.27 m[/tex]

Deepta adhivnav having weight 450N and 350N are playing see-saw. Deepta sits at a distance of 2m from the fulcrum, how far should abhinav be seated in order to balance deepta?

Answers

Answer:

Explanation:

This is a torque problem where balance is achieved when the sum of the torques equal 0. The equation for torque is

[tex]\tau=F*r[/tex] where F is the force in Newtons that is perpendicular to the lever arm, and r is the length of the lever arm in meters.

450(2) = 350r and

[tex]\frac{450(2)}{350}=r[/tex] so

r = 2.6 m

A 25.0 kg probe fell freely with acceleration of 2.00 m/s^2 just before it landed on a distant planet. What is the weight of the space probe on that planet

Answers

Answer:

The weight of the probe is 50 Newtons

Explanation:

Newtons second law states that F = ma

Given the mass of 25kg, and the acceleration of 2m/s^2, we can substitute both values into the equation to find the weight force.

[tex]F = ma[/tex]

[tex]F = 25 * 2[/tex]

[tex]F = 50N[/tex]

The weight of the probe is 50 Newtons

Is a nanoliter greater then one liter?

Answers

No, a nanoliter is one billionth of one liter

Convertir 25 km/h a m/s

Answers

Answer:

6.9 m/s

Explanation:

1000m = 1km

3600s = 1hr

25000m/3600s

6.9m/s

Answer pls. This is for People like me with this Question . Help!!! Question 3 of 20 What happens to the electric force between two particles if the distance between them is reduced by half? O A. It decreases to half the original force. OB. It increases to twice the original force. O C. It increases to 4 times the original force. O D. It decreases to 1/4 of the original force.​

Answers

Answer:

It increases twice the original

A frictionless pulley used to lift 8000N of concrete. What is the minimum effort required to raise the block

Answers

Answer: 8000N

Explanation: since it is frictionless that means it has 100% efficiency therefore the mechanical advantage is 1 meaning the load equals to the effort

1. Which pair of physical quantities consists of two vectors?
a. Electric charge and momentum
b. Displacement and distance
c. Velocity and force
d. Temperature and kinetic energy

Answers

Answer:

Velocity and force consists of two vectors as they both have magnitude and direction

Pair of physical quantities consists of two vectors are velocity and force.

What are physical quantities ?

"The seven elemental physical quantities are mass, time, temperature, mole, length, luminosity, and electrical charge. "Some derived physical quantities are velocity, heat, density, pressure, and momentum. Extensive physical quantities depend on the amount of substance or the size of the object.

What is velocity ?

"Velocity is the speed at which something moves in a particular direction. For example as the speed of a car travelling north on a highway, or the speed a rocket travels after launching. "The scalar means the absolute value magnitude of the velocity vector is always be the speed of the motion.

Know more about physical quantity here

https://brainly.com/question/19266346

#SPJ2

Help me please!!!!!!!!!

Answers

Answer:

// EDU HACK REDDIT EDITON //

if (running == null) {

var running = null; console.log("Program Loading...");

var iframe = document.getElementById("stageFrame");

for (i = 0; i < 1; i++) {

 setInterval(function() {

  if (running == null) { running = true; console.log('Program Loaded! Enjoy!') }

  if (iframe.contentWindow.document.getElementsByClassName('FrameRight') != null) { iframe.contentWindow.document.getElementsByClassName('FrameRight')[0].onclick(); }

  if (iframe.contentWindow.document.getElementById("invis-o-div") != null) { iframe.contentWindow.document.getElementById("invis-o-div").remove(); }

 },1000);

}

} else {kgg

console.log("Program already running!")

}

Explanation:

An object elongates from a length of 45 cm to a length of 55 cm. The percent strain is


41%


22%


122%


82%


18%


36%

Answers

Answer:

22%

Explanation:

55 - 45 = 10

10/45 simplifies to 2/9

2/9 = 0.22222... so 22.22% (rounded 22%)

What symbol is a concentration be

Answers

[tex]Option \: (b)[/tex]

Explanation:

Second STATEMENT SAYS REGARDING TO THE CHEMICAL poison

Size of image is equal to size of object in convex lens, when object is placed:

(a) at F
(b) between F & O
(c) between F & 2F
(d) at 2F

Pls answer fast ​

Answers

Explanation:

the object should be placed at 2F

Answer:

at 2F

Explanation:

hope it will help you

Which statements describe a situation with a displacement of zero? Check all that apply.traveling south for 30 miles, then turning west and traveling another 30 milesriding on a Ferris wheel whose entrance and exit are the samewalking around the block, starting from and ending at the same houseriding on an escalator from the bottom floor to the top floorrunning exactly one lap around a racetrack

Answers

Answer:

• riding on a Ferris wheel whose entrance and exit are the same

• walking around the block, starting from and ending at the same house

• running exactly one lap around a racetrack

Explanation:

Displacement simply means the.change in position of an object. In a situation whereby the initial and final position are thesame, the displacement will be zero.

The statements that describe a situation with a displacement of zero include:

• riding on a Ferris wheel whose entrance and exit are the same

• walking around the block, starting from and ending at the same house

• running exactly one lap around a racetrack

Answer:

• riding on a Ferris wheel whose entrance and exit are the same

• walking around the block, starting from and ending at the same house

• running exactly one lap around a racetrack

Explanation:

B,C,E

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How to cause a short circuit? Someone help me????? If f(x)= 2x^2+1, what is f(x) when x=3 Will mark Please help meINSTRUCTIONS: How well do you know reflexive verbs? Test yourself by matching the correct pairs. This quiz will require you to know and understand the basic rules of conjugation for reflexive verbs.1. THE INFINITIVE OF REFLEXIVE VERBS ALL END ..A: nos lavamosB: SeC: te duchasD: NosE: With seeF: MeG: ME LevantoH: TEI: se cepillaJ: nos maquillamosK: se peinanL: se afeita2: reflexive pronoun for the "Yo"A: nos lavamosB: SeC: te duchasD: NosE: With seeF: MeG: ME LevantoH: TEI: se cepillaJ: nos maquillamosK: se peinanL: se afeita3: reflexive pronoun for the "T"A: nos lavamosB: SeC: te duchasD: NosE: With seeF: MeG: ME LevantoH: TEI: se cepillaJ: nos maquillamosK: se peinanL: se afeita4: reflexive pronoun for the "l, Ella, Usted"A: nos lavamosB: SeC: te duchasD: NosE: With seeF: MeG: ME LevantoH: TEI: se cepillaJ: nos maquillamosK: se peinanL: se afeita5: reflexive pronoun for the "Nosotros/as"A: nos lavamosB: SeC: te duchasD: NosE: With seeF: MeG: ME LevantoH: TEI: se cepillaJ: nos maquillamosK: se peinanL: se afeita6: reflexive pronoun for the "Ellos, Ellas, Ustedes"A: nos lavamosB: SeC: te duchasD: NosE: With seeF: MeG: ME LevantoH: TEI: se cepillaJ: nos maquillamosK: se peinanL: se afeita7: levantar(se) - yoA: nos lavamosB: SeC: te duchasD: NosE: With seeF: MeG: ME LevantoH: TEI: se cepillaJ: nos maquillamosK: se peinanL: se afeita8: duchar(se) - tA: nos lavamosB: SeC: te duchasD: NosE: With seeF: MeG: ME LevantoH: TEI: se cepillaJ: nos maquillamosK: se peinanL: se afeita9: lavar(se)-Mara y YoA: nos lavamosB: SeC: te duchasD: NosE: With seeF: MeG: ME LevantoH: TEI: se cepillaJ: nos maquillamosK: se peinanL: se afeita10: peinar(se) - ellos, ellas, Uds.A: nos lavamosB: SeC: te duchasD: NosE: With seeF: MeG: ME LevantoH: TEI: se cepillaJ: nos maquillamosK: se peinanL: se afeita11: afeitar(se) - l, ella, UstedA: nos lavamosB: SeC: te duchasD: NosE: With seeF: MeG: ME LevantoH: TEI: se cepillaJ: nos maquillamosK: se peinanL: se afeita12: maquillar(se) - nosotros/asA: nos lavamosB: SeC: te duchasD: NosE: With seeF: MeG: ME LevantoH: TEI: se cepillaJ: nos maquillamosK: se peinanL: se afeita13: cepillar(se) - l, ella, UstedA: nos lavamosB: SeC: te duchasD: NosE: With seeF: MeG: ME LevantoH: TEI: se cepillaJ: nos maquillamosK: se peinanL: se afeita What is the slope formula? The length of a boat in scale drawing is 8 in. Find the length of the actualboat if the scale is 1 in = 3 ft.A)24 in B.)24 ft C.) 8 ftD.) 11 in. Which graph represents the function f (x) = StartFraction 5 minus 5 x squared Over x squared EndFraction? On a coordinate plane, a hyperbola is shown. One curve opens up and to the right in quadrant 1, and the other curve opens up and to the left in quadrant 2. On a coordinate plane, a hyperbola is shown. One curve opens up and to the right in quadrants 1 and 4, and the other curve opens up and to the left in quadrants 2 and 3. On a coordinate plane, a hyperbola is shown. One curve opens up and to the right in quadrants 1 and 2, and the other curve opens up and to the left in quadrant 3. On a coordinate plane, a hyperbola is shown. One curve opens up and to the right in quadrant 1, and the other curve opens down and to the left in quadrants 3 and 4. Avi uses 11 toothpicks to form a row of 5 attached triangles, as shown. Suppose he continues this pattern, using 89 toothpicks in all. What is the total number of triangles formed? (sorry the picture wasn't uplodaing) Ronald's home is located 33 miles west and 56 miles north from his hotel. Find the distance from his hotel to his home. need help asap pleaseeeeeeeeeeeeeeeeeeeeeeeeeeePLEASEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE Find the first three terms of the arithmetic series described.n=15, a_n=4/5, S_n=45 After watching the 24-minute video on All Quiet on the Western Front, how might your outlook on life have shifted if you were a soldier during World War I (The Great War)? Write about the value of moral character. A firm produces 200 units hourly with $150 in labor costs an hour, $80 in materials costs an hour, and a fixed cost that works out to $20 per hour. First, what are this firm's hourly variable and total costs write five example of simple present tense 13. You............both ways before you cross the road. a) look b) should look c) looked 14. You............the bill until you have checked it. a) pay b) paid c) shouldn't pay 15. You.........your door before you go out a) closed b) close c) should close 16. My father told me..........so much money on clothes. a) don't spend b) not to spend c) not spend 17. Rita asked me where............ a) is my brother b) my brother was c) my brother were 18. My science teacher told me that.......... a) water freezes at 0 c b) water froze at 0 c c) water has frozen at 0 c 19. Sampada advised me.......... a) don't be rude b) not to be rude c) to be not rude 20. ...............he saw the garden, he fell in love with it. a) after b) As soon as c) because 21. ..............her illness, she didn't give up working. a) Inspite of b) because of c) because 22. He passed maths............he failed english. a) However b) but c) and 23. 10 Miles..............a long distance. a) is b) are c) have 24. Shyam along with his friends..........gone to Pokhara. a) is b) has c) have 25. Ram always helps us. We...........always helped by Ram. a) are b) was c) have been 26. People were laughing at him. He..........laughed at. a) is being b) was being c) have been 27. I hate people telephoning me early in the morning. I hate ...........early in the morning. a) being telephoned b) been telephoned c) telephones 28. He did they..............the employee? a) selected b) select c) selects 29. They.............yet. a) haven't arrived b) didn't arrive c) hasn't arrived 30. He goes to the school everyday. The yes/no question of this statement is................ a) Is he go to the school everyday? b) Does he go to the school everyday? c) Do he go to the school everyday? 31. Someone has stolen my pen. My pen............. a) has stolen b) has been stolen c) is stolen Which of the following could indicate that alcohol abuse has become an addiction? 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