# Maryam

Popular questions and responses by Maryam
1. ## physics

A block of mass m1=3.70kg on a frictionless plane inclined at angle 30 deg is connected by a cord over a massless, frictionless pulley to a second block mass m2= 2.30kg. What is... a) The magnitude of the acceleration of each block? b) The direction of the

2. ## chemistry

The molar enthalpy of vaporization for water is 40.79 kJ/mol. Express this enthalpy of vaporization in joules per gram. b. The molar enthalpy of fusion for water is 6.009 kJ/mol. Express this enthalpy of fusion in joules per gram.

3. ## Physics

Problem 2- 1. As a ship is approaching the dock at 45 cm/s, an important piece of landing equipment needs to be thrown to it before it can dock. This equipment is thrown at 15.0 m/s at 60∘ above the horizontal from the top of a tower at the edge of the

4. ## physics

A particle moving in simple harmonic motion passes through the equilibrium point x=0, 3 times per second. At t=0 its velocity at x=−0.0325m is negative. It travels 0.5m in a complete cycle. a) what is the phase constant in cm. i found the equation:

5. ## biomechanics

an orienteer runs 300m north and then 400m to the southeast (at a 45 degree angle to north). if he runs at a constant speed, how far away is he from the starting position?

6. ## Physics

At t=0, a particle leaves the origin with a velocity 6m/s in the positive x direction and moves in the x-y plane with a constant acceleration (-2i-4j)m/s2 How far the particle from the origin at t=1 ?

7. ## Physics

Problem 1- A dog running in an open field has components of velocity vx = 2.2m/s and vy = -2.5m/s at time t1 = 12 s. For the time interval from t1 = 12 s to t2 = 24 s , the average acceleration of the dog has magnitude 0.55 m/s2 and direction 25.5∘

8. ## Physics

Problem 4- Speedy car, driving at 30 m/s. The driver suddenly observes a slow-moving van 155 m ahead traveling at 5 m/s in the same direction. The driver of the car immediately applies the brakes causing a constant acceleration of 2 m/s2 in a direction

9. ## Physics

A police car approaches a large wall at 51m/s. Its siren emits a 980 Hz signal. What is the frequency of the reflected sound observed by the officer?

10. ## Physics

Jack and a Jill are standing on flat ground in front of an empty well that extends a depth s below the ground. Jill tosses a penny down the well with an initial velocity u0, while Jack decides to toss a penny up with an initial velocity v0. How long does

11. ## physics

A police car moving at 75m/s is initially behind a truck moving in the same direction at 14m/s. The natural frequency of the car's siren is 1000Hz. What is the change in frequency observed by the truck driver as the car overtakes him?

12. ## Physics

The observed frequency of a train whistle is 513Hz as it approaches a stationary observer and is 432Hz as it recedes. Find the speed of the train

13. ## Physics

2-A 10.0 Kg block is released from point A in the figure below. The block travels along a smooth frictionless track except for the rough 1 m long portion between points B and C. At the end of the track, the 10 kg block hits a spring of force constant (k) =

14. ## math

LCM of 10a and 15a^2 Factors of 10a are 10,a,2,5 but the prime factors are 2,5,a Factors of 15a^2 are 15,a^2, 3,5,a,a Prime factors are 3,5,a,a Common between two are 5 and a So is the LCM of 10a and 15^2 5a?

15. ## Math

1.if 40% of pupils in a school are boys,what percentage of the pupils are girls? 2.increase 448 by 25% 3.decrease 20.00 by 5%

16. ## Physics

A rocket, initially at rest, is fired vertically with an upward acceleration of 10 m/s2. At an altitude of 500 m, find its velocity. 1000 m/s 500 m/s 100 m/s 10 m/s

17. ## Physics

Problem 1- A 4 kg puck can slide with negligible friction over a horizontal surface, taken as the xy plane. ˆ The puck has a velocity of 3i m / s at one instant ti = 0 . Eight seconds later, its velocity is to be ˆˆ 8i + 10 j m / s . Find the magnitude

18. ## Physics

An 100kg box is placed on the ramp. As one end on the ramp is raised the box begin to move down ward just as the angle of inclination reaches 15 degree . What the coeffenict of static friction between box and ramp .. ?

19. ## Physics

Problem 3- Blocks A, B, and C are connected by ropes and placed as in the figure. Both A and B weigh 22.6 N each, and the coefficient of kinetic friction between each block and the surface is 0.40. Block C descends with constant velocity. a) Draw free-body

20. ## Waves and optics

Find the binding energy per nucleon in J and eV for the three following isotopes, given their atomic masses in u: 22(A) 6(Z) of carbon 22.0572097 u

21. ## Physics

Problem 2- A car is stopped at a traffic light. It then travels along a straight road so that its position from the light is given by x(t) 2.5t - 0.13t^2 in meters. c. What is the position of the particle when it reverses its motion?

22. ## Physics

The 2nd harmonic of a string of length 60cm and linear mass density 1.7g/m has the same frequency as the 5th possible harmonic of a closed pipe of length 1.2m. Find the tension in the string.

23. ## Physics

1- A 5.0 kg block moving east with speed of 6 m/s collides head on with another 8.0 kg block moving west with speed of 4 m/s. After the collision the 5.0 kg block was moving west with speed of 5 m/s while the 8.0 kg block was moving east. a) What is the

24. ## Physics

A block of aluminum that has dimensions 2.07 cm by 2.55 cm by 5.00 cm is suspended from a spring scale. The density of aluminum is 2702 kg/m^3. (a) What is the weight of the block? 0.699 N (b) What is the scale reading when the block is submerged in oil

25. ## Physics

A 4 kg puck can slide with negligible friction over a horizontal surface, taken as the xy plane. ˆ The puck has a velocity of 3i m / s at one instant ti = 0 . Eight seconds later, its velocity is to be ˆˆ 8i+10 j m / s . Find the magnitude and direction

26. ## Physics

2-A 10.0 Kg block is released from point A in the figure below. The block travels along a smooth frictionless track except for the rough 1 m long portion between points B and C. It makes a collision with stationary 10 kg ball after passing point C. The

27. ## Physics

A15N crate rests on an ramp , the maximum angle just before it slips is 25 degree with the horizantle , what the coefficient of static friction between the crate and ramp surfaces ?

28. ## maths

a car depreciates at rate of 10%per year. the car cost £20000 new. (a) explain why the car wont be worth £16000 after 2 years (b) show that the car will be worth £16200 after 2 years and find the value of the car after 3 years (c) describe the type of

29. ## grammar

Last night, my brother Answer me a secret.

30. ## math

two parallel chords lie on opposite sides of the centre of a circle of radius 13cm.their lengths are 10cm and 24cm. what is the distance between the chords

31. ## Math

Monica has 8 more 3 times the number of marbles Regina has. If Regina has r marbles, how many does Monica have? __________ marbles If Regina has 12 marbles , how many dies Monica have? ________ marbles PLEASE HELP!

32. ## Maths

You can buy x pencils for 80p How much will it cost to buy y pencils?

33. ## Grammar

Circle the nouns that can be used with the verbs on the right . Engine-consumption-dependence (reduce) Solution-dependence-alternative (find) Resources-technology-stocks(deplete) Quantity-problems-question(solve) Energy-crisis-shortage (face)

34. ## Math

A rectangle is 8cm long and back broad. Find the range of valued of b if the perimeter of the range is not greater than 50cm and not less than

35. ## math-factors and multiples

GCF of 40a^3 and 32a^2

36. ## Physics

The maximum possible value for the coefficient of static friction ?

37. ## Grammar

Circle the nouns that can be used with the verbs on the right . Engine-consumption-dependence (reduce) Answer : consumption and dependence Solution-dependence-alternative (find) Answer:solution and dependence Resources-technology-stocks(deplete)

Which language is spoken by most people in Brazil because of that countrys colonial heritage? I think the answer is Spanish.. am i right?

39. ## math

Many people are trying to reduce their carbon footprint. Amrita’s carbon footprint this year was 85% of last year’s footprint. If her carbon footprint this year is 34 tonnes, what was her carbon footprint last year? please help!!!!

40. ## Physics

Acceleration due to gravity on the moon's surface is 1/6th that on the earth . An object weight 900N on the earth . What does it weight on the moon ?

41. ## Physics

1)The speedometer on a car’s dashboard measure average speed average velocity instantaneous acceleration instantaneous speed 2)A car moving on a straight road increases its speed from 30 m/s to 50 m/s in a distance of 180 m. If the acceleration is

42. ## Physics

A long wire carries a current of 20 A along the directed axis of a long solenoid. The field due to the solenoid is 4 mT. Find the field at a point 3 mm from the solenoid axis.

43. ## Chemistry

A 35.0 g block of copper at 350.0 degrees celcius is added to a beaker containing 525 g of water at 35.0 degrees celcius. What is the final temperature of water?

44. ## Physics

A500 man stands at the center of the rope such that each half of the ropes makes an angle of 10 with the horizentle . What is the tension of the rope ???

45. ## Calculus

5. Find the volume of the solid generated by revolving the region bounded by y = x2, y = 0 and x = 1 about (a) the x-axis (b) the y-axis

46. ## author

Kindly I want an eassay or a debate of 2 min on these topics: 1. When wealth accumulates, man decays 2. Death is my faith, revenge my curse. I shall be grateful to you. Regards, Maryam

47. ## maths

show that 0.27 (both recurring) can be written as 3/11?

48. ## physics

an aluminium of mass 2.1 kg rests on a steel platform. A horizontal force of 15N is applied to block(a) given the coefficient of limiting friction is 0.61 will the block move? (b)if it moves what will be its acceleration?

49. ## Physics plz

Do any teacher here have an email plz becouse I want to send some pictures for question ,,, physics plz or how can I attach picture here ????

50. ## Physics

3- A 5.0 Kg block is released from point A in the figure below. It travels along the smooth surface A  E except for the part B  C where the surface is rough. Point A is 3 m above the lowest point C. The block continues in its motion up the surface

51. ## Physics

A long wire carries a current of 20 A along the directed axis of a long solenoid. The field due to the solenoid is 4 mT. Find the field at a point 3 mm from the solenoid axis.

52. ## Geometry

Write a two column proof proving figure ABCD is a rhombus. Given - diagonal BC.

53. ## Science

Two uses of chemicals in our everyday life

54. ## mba

identify several ways you current use accounting information in student life

55. ## Physics

Ahmad throws a ball straight up. For which situation is the vertical velocity zero? [Note: Neglect the air resistance] Answer at the top on the way up none of the above on the way down

56. ## chemistry

HELPPPP!!!! This is a lab, and i need help with the equations please!! Thank you !! Heat of fusion data table : Mass of foam cup = 3.57g Mass of foam cup + warm water = 104.58g Mass of foam cup + warm water + melted ice = 129.1g Temperature of warm water =

57. ## Chemistry

How much heat is required to raise the temperature of a 35.0g block of aluminium from 125 degrees celcius to 322 degrees celcius?

58. ## Chemistry

How much heat is required to raise the temperature of a 125g block of iron from 17.5 degrees celcius to 82.3 degrees celcius?

59. ## Chemistry

A 25.0 g block of copper at 350.0 degrees celcius has 857J of heat added to it. What is the final temperature of the block of copper?

60. ## Chemistry

What is the possible ionic equation of TrisEDTA solution? REDOX reaction.

61. ## history project

I need to know these questions What is Immigration? Why did immigration happen? How did immigration happen? When did immigration happen? Where did immigration take place? and Who was involved in it? please help me

63. ## maths

Steve is trying to make the weight for a Boxing match. Steve needs to be 72kg or less for fight night. He is currently 79kg. His trainer tells him he can lose 4lbs a week comfortably. Given 1kg = 2.2lbs find how many weeks it will take Steve to reach his

64. ## Physics

A students adds two vectors with magnitude of 200 and 40 , what is the resultant ?!

65. ## Grammar

Circle the nouns that can be used with the adjectives on the right , Development-environment-figures. (Recent) Answer:development and environment Crisis-supply-estimates. (Reliable) Answer:supply and estimates Awareness-theory-concern. (Public)

66. ## Calculus

3. Find the volume of the solid with cross-sectional area A(x) = 10 e^0.01x, 0 ≤ x ≤ 10.

67. ## Calculus

(c) find the integral of e^x/ e^3x + e^x dx

68. ## Grammar

Circle the nouns that can be used with the adjectives on the right , Development-environment-figures. (Recent) Crisis-supply-estimates. (Reliable) Awareness-theory-concern. (Public) Region-prices-solution. (Affordable) Protection-needs-sanitation.

69. ## Physics

1- A mass m is pushed against a spring of spring constant k = 12000 N/m. The mass slides on a horizontal smooth surface except for a rough one meter long section, and then it encounters a loop of radius R as shown in the figure. The mass just barely makes

70. ## Math

Trisha is t years old.If Kyle is 3 years younger than Trisha, then Kyle is ___________years old Damien has d DVDS. If Nadia has half as many as DVDS as Damien, then Nadia has _______ DVDS please help

71. ## Math

3^2*3^3=3^5 7*0.1=7/10 5^2*5^3=5^5 3*0.1=3/10 13^2*13^3=13^5 4*0.1=4/10 For each set of special cases, write a general pattern. HELP I DON'T GET THIS!!

72. ## calculus

You are working as assistant to a major movie producer from Hollywood, but mainly you look after pre-release film publicity. You are an old hand at publicity, having worked in several production companies before. Based on previous experience you have

73. ## Math

The side of a triangle are nc cn x+3cm and 10cm if x is a whole number of cm find the lowest value of

74. ## computer

I need help ?you are employed as an IT manager in GOTEC ,which is a small sized company (with 20 employers )that is based in London ,the company sells desktop computers and accessories . to help develop your understanding about basics of computer

75. ## computer

I need help ?you are employed as an IT manager in GOTEC ,which is a small sized company (with 20 employers )that is based in London ,the company sells desktop computers and accessories . to help develop your understanding about basics of computer

76. ## math

Surface area of a composite object. A cone with a slant height of 8.9cm and a radius of 4cm. The cones base is attached on top of a rectangular prism whose length is 41cm, width is 20cm and height is 40cm. It is attached with a hemisphere whose radius is

77. ## maths

point A(4,6) and point B(7,9) are connected by straight line .what is the length of the line?(Pythagoras)

78. ## Physics

Problem 3- If a bug can jump straight up to a height of 0.5 m. a) what is its initial speed as it leaves the ground? b) How long is it in the air?

79. ## Calculus

4. Find the volume of a pyramid of height 160 feet that has a square base of side 300 feet

80. ## Chemistry

7750 J of energy is added to a 325g stone at 24.0 degrees celcius. The temperature increases by 75.0 degrees celcius. What is the specific heat of the stone?

81. ## math

Can I double check this I'm not entirely sure if my answer is correct. What is the smallest perfect square that has a factor of 90. 8100?

82. ## English

please help me ,i am doing level 2 English and i have reading and writing exam ,do you guys know Any good websites I can use to improve it ?

83. ## maths

the diagram below shows a fair spinner with 6 equally sized sections .mike did an experiment and carried out n spins , the spinner landed on the number 5 a total of 37 times .estimate the value of n?

84. ## Physics

Problem 2- A boat has a velocity of 0.54 m/s southeast relative to the earth. The boat is on a river that is flowing 0.60 m/s east relative to the earth

85. ## Calculus

1. Evaluate the following integrals (a) 􏰀 4x2 +6x−12 / x3 − 4x dx

86. ## chemistry

how much heat is required to raise the temperature of a 35 gm block of aluminum from 125 to 322 degrees?

87. ## chemistry

What is the energy of an electron with a principle quantum number of n=2

What steps you would take in order to be a writer when you grow up? PLEASE HELP I DON'T KNOW WHO TO ANSWER THIS QUESTION

89. ## history

I need help picking a easy topic. the topic should be like historical events but i can't think of any. can you please help me!!!!

90. ## Calculus

Find the integral of sin(x) cos(x)/sin^2(x)-4 dx

91. ## Physics

3- A 5.0 Kg block is released from point A in the figure below. It travels along the smooth surface A  E except for the part B  C where the surface is rough. Point A is 3 m above the lowest point C. The block continues in its motion up the surface

92. ## Math

The base of a rectangle is twice the length of the height. If the height of the rectangle is h inches,what is the length of the base? ______________ inches If the height of the rectangle is 4 inches what is the length of the base? ________ inches PLEASE

94. ## MATH

Marth's mother is 5 times as old as Marta Marth'smother is 25 years old 1. How old is Matra? 2.In 5 years Marta's mother will be 3 times as old as Marta.How old will Marta be then?

95. ## Programming C++

#include #include { clrscr(); int first_value; int second_value; long result; print f("enter your first value:); scanf("%d",&first_value); printf("enter your second value:); scanf("%d",&second_value:); result=first_value+second_value; printf("the sum of

96. ## Programming C++

If we are using two data intergers and there answer is bigger than simple data intergers and we are givig computer long data integers for the answer but the answer is false . so i want to know why it is false?

97. ## computer

identify the components of local area networks and wide area networks and explain the characteristics of LAN and WAN by focusing on the benefits associated to their deployments.can anyone help me please ?

98. ## maths

anyone know which topics is on non calculator?

99. ## Grammar

Solution-dependence-alternative (find) Answer:alternative and dependence Resources-technology-stocks(deplete) Answer:Resources and stocks Now is it correct ??