Mimi

1. physics

A crowbar ,1.5m long is used to lift a 100kg rock out of a hole 25cm deep.If the crowbar pivots 50cm from one end ,what is the force that must be used to just lift the rock ?
2. Math

A truck was carrying a load of 1,458 pounds of gravel. Another 1,731 pounds of gravel was loaded onto the truck. Olivia said that the truck now holds 3,189 pounds of gravel. Which expression can be used to check Olivia's answer, and is Olivia correct? A.
3. literature and comprehention

Whose ideas about nonviolent protest inspired King? A. Malcolm X B. Mahatma Gandhi C. John F. Kennedy D. Lyndon B. Johnson
4. Math

Mason wants to buy some pull toys for his dogs. Each toy costs $3. He knows that 1 toy costs$3, 2 toys cost $6, and 3 toys cost$9. How much will 4 toys cost? A. $15 B.$12 C. $11 D.$10
5. Vocabulary

I really need to exercise because I've been ______ lately. A. secure B. active C. limited D. inactive
6. Vocabulary

My dad is looking for a _______flight to Florida. A. cheap B. loose C. faint D. broad
7. Physics

A gallon starts rising from the ground from rest with an upward acceleration 2m/s^2. Just after 1s, a stone is dropped from it. The time taken by stone to strike the ground is nearly 1) 0.3s 2) 0.7s 3) 1s 4) 1.4s
8. Chemistry

Which of the following given ratio of units of length gives the highest value? (1) 1pm/1fm (2) 1hm/1Gm (3) 1dm/1μm (4) 1Mm/1nm
9. Physics

a wave function expressing displacement (y) as a function of its (x) and time (t) is given as y = P log (Qx + Rt) Which of the following expressions has dimensions different from one another? (1) yR (2) PR (3) R/Q (4) QR
10. Physics

the dimensional formula of m(dv /dt) is (1) MLT-1 (2) M-1LT-1 (3) ML2T-1 (4) [MLT-2]
11. the length of a rectangular plate is measured by a

the length of a rectangular plate is measured by a metre scale and found to be 10.0 CM its width is measured by vernier calipers as 1.00 CM least count of the metre scale and Vernier calipers 0.1 cm and 0. 01 CM respectively maximum permissible error in
12. Physics

the potential energy of a particle varies with velocity v as U equals to Av3/v + B where A and B are constant dimensional formula A/B is (1) ML-1T (2) M-1LT (3) L-1T-1 (4) MLT-1
13. Physics

if the unit of force is 10 Newton the unit of acceleration is 2 m/s2 square into velocity is 5 m/s then the unit of momentum is (1) 10kgm/s (2) 15 kgm/s (3) 25kgm/s (4) 30 kgm/s
14. Physics

a new unit equal of length is equal to 10 M the area of a m square expressed in term of new unit has a magnitude of (1) 0.05 (2) 0.50 (3) 5.05 (4) 5.00
15. Chemistry

Two flasks A and B of equal capacity of volume contain SO3 and Co gas respectively under similar conditions of temperature and pressure. Then, which of the following statement is true? (1) A has twice the number of moles as that B. (2) B has twice the
16. Chemistry

Four one litre flasks are separately filled with the gases CO2, F2, NH3 and He at the same room temperature and pressure. The ratio of the total number of atoms of these gases present in the different flasks would be? (1) 1:1:1:1 (2) 1:2:2:3 (3) 3:2:4:1
17. Chemistry

What combination of volumes (ml) of C2H4 and O2 are required to obtain 400ml of CO2? All volumes are measured at STP. 1. 100,300 2. 200,600 3. 200,200 4. 300,300
18. Chemistry

The total number of electrons in 1.6g of CH4 to that of 1.8g of H2O is?
19. Chemistry

How much volume will be occupied by 2 mole CO2 gas at stp?
20. Physics

The voltage across a lamp is (6.0 +_ 0.1) V and the current flowing through it is (4.0 +_ 0.2) A. Find the power consumed with maximum permissible error in it?
21. Chemistry

Equivalent weight of H3PO4 for the given reaction, H3PO4 + Ca(OH)2 = CaHPO4 + 2H2O is?
22. Chemistry

Equivalent weight of crystalline oxalic acid is?
23. Chemistry

What volume of oxygen gas measured at 0°C and 1 atm is needed to burn completely 1L of propane gas measured under same conditions?
24. LA

which of the following sentences contains a pronoun in the nominative case? A. We packed bags for a trip to the beach. B. Our bags are decorated with beach balls. C. Hand him the bags and Mark will load the car. D. His car is packed full! Please Help God
25. Social Studies

Why were many Eastern European countries associated with the Soviet Union after the World War 2??
26. Math

Kurt cut into wedges measuring 40 degrees if each person eats one piece of pizza how many people could he feed with two whole pizzas
27. Homework Help Math

Q. marx's clothing store is selling a lot of items. On Monday 495 items were sold. On Tuesday 450 items were sold. On Friday 593 items were sold. Marx's misplaced the totals for Wednesday and Thursday, but the average over the five days was 494 items per

30. Chemistry

A scintillation counter detects radioactivity by: A) none of the answers. B) emission of light from a NaI crystal when radioactivity passes through the crystal. C) ionization of argon gas in a chamber which produces an electrical signal. D) analyzing the
31. Chemistry

For the reaction Ag2S(s) ⇌ 2 Ag+ (aq) + S2- (aq), what happens to the equilibrium position if ammonium sulfate is added? A) doubles B) shifts to the left C) does nothing D) shifts to the right E) halves
32. Chemistry

Identify the equation for which Keq = [Cu+]2[S2-]. A) CuS(s) ⇌ Cu2+(aq) + S2- (aq) B) 1/2Cu2S(s) ⇌ Cu+(aq) + 1/2 S2- (aq) C) Cu2S(s) ⇌ 2Cu+(aq) + S2- (aq) D) Cu2S(s) ⇌ Cu+(aq) + 2 S2- (aq) E) none of the answers
33. Chemistry

Which of the following is TRUE for a system that is in dynamic equilibrium? A) The forward reaction goes to 100% completion. B) The concentration of products is equal to the concentration of the reactants. C) The reaction rate of the forward reaction
34. Social Studies

4. Favoring the idea of national regulation of trade between states would be an example of which political party's stance listed in the chart? (1 point) the Federalist Party’s belief in a strong central government the Democratic Republican’s support
35. Social studies

What is the name given to a hook or curved area of land that extends into a sea or a Ocean
36. English

Please check this! The diction of "at the tourist centre in boston" can best be described as.. A. Emotionally charged B. Colloquial and relying on slang C. Informal and simple D. Mostly figurative I don't think it's C or D? My best guess is A.
37. Foundation Chem

Why do we need to keep water warm in a limiting reactant experiment around 80 to 90 degree celcius
38. math

A spinner is divided into 8 equal parts. They are numbered 1-7 and the 8th has a star. What is the probability of it landing on the star?
39. Math

what is the greatest perimeter of a rectangle with an area of 39 square feet
40. math

lamar made a garden in the shape of a rectangle with an area of 36 square feet. The shorter side of the garden measures 4 feet. Explain how you can find the perimeter of the garden
41. math

The Flying Zucchini Circus Troupe has a human cannon- ball act, shooting a performer from a cannon into a spe- cially padded seat of a turning Ferris wheel. The Ferris wheel has a radius of 40 feet and rotates counterclockwise at one revolution per minute.
42. Math

Name the lengths of the sides of three rectangles with perimeters of 12 units. use only whole numbers
43. Math

is a trapezoid a parallelogram explain why or why not
44. Math

draw one diagonal in the shape for exercise 8

62. social studies

a Do you think it was possible for a native person to adapt to victorian society? was such adaptation necessary ? Was it right? why or why not?
63. Math Help

Hi! Can someone help check this for me and see if I'm doing it right? Thanks!! :) Directions: Use the Half-Angle formulas to determine the exact value of sin(pi/12). Here's what I have: π/12 = ( 180° ) / 12 = 15°. = sin ( π/12 ) = sin 15° = sin ( 45°
64. Math

The edge of a cube was found to have a length of 50 cm with a possible error in measurement of 0.1 cm. Based on the measurement, you determine that the volume is 125,000 cm3. Use tangent line approximation to estimate the percentage error in volume.
65. math

Ken uses 6 apples and 2 bananas to make a fruit salad. He puts twice as many oranges as bananas in the salad. How many pieces of fruit will Ken use to make 2 fruit salads?
66. Physics- formula help

How do you calculate air resistance on an object if you have how much the object weighs and the acceleration?
67. Chemistry

A sample of lithium sulfate, LiSO4, contains 6.78 x 10^23 formula units. a) How many moles of Li+ ions are there in the sample? b) How many moles of ions are there in the sample? My work: I think a) is 2.26 moles And b i am not sure
68. Chemistry

A sample of lithium sulfate, Li2SO4, contains 6.78 x 10^23 formula units a) How many moles of Li+ ions are there in the sample b) How many moles of ions are there in the sample
69. Calculus

Match the rule with the title: ____ 3. d/dx [f(x)/g(x) ]=(g(x) f^' (x)-f(x) g^' (x))/[g(x)]^2 ____ 4. d/dx [f(g(x))]=f^' (g(x))∙g'(x) ____ 5. d/dx [f(x)∙g(x)]= f(x) g^' (x)+g(x) f^' (x) ____ 6.d/dx [x]=1 ____ 7. d/dx [f(x)+g(x)]= f^' (x)+g^' (x) or
70. chemistry

Calculate the Calorimeter Constant (Ccal) if 25.00 g of water at 50.21°C was added to 25.00 g of water at 25.00 °C, resulting in an equilibrium temperature of 35.00 °C?
71. chemistry

What is the percent mass of calcium in a calcium supplement if 1.06 g of calcium carbonate is extracted from a 2.82 g pill
72. math

If you know the order from least to greatest of 5 negative rational numbers, how can you use the information to order the absolute values of those numbers from least to greatest
73. trigonomety

FIND THE HEIGHT OF A TREE,IF 120 FT. FROM ITS BASE THE ANGLE OF ELEVATION OF ITS TOP IS 10 DEGREE 18 MINUTES

1) what is the greates perimeter of a rectangle with an area of 39 square feet? 2) What is the least perimeter of a rectangle with an area of 32 square feet? 3) A rectangle has an area of 42 square inches. Which has a greater perimeter, the rectangle with

two rectangles have an area of 36 square inches. Name two possible perimeters for the rectangles.

Lee wants to cut this piece of canvas into two rectangles that are 3 x 2 and 3 x 5. He wants the sum of the areas of the two small rectangles to be the same as the area of the large rectangle. Can he do this? explain.
77. geometry

ee wants to cut this piece of canvas into two rectangles that are 3 x 2 and 3 x 5. He wants the sum of the areas of the two small rectangles to be the same as the area of the large. Can he do this? explain.
78. math

Suppose Maya made another sign with an area of 48 square inches. would this sign be larger or smaller than the sign with an area of 48 square centimeters? Explain how you know.
79. managerialaccounting

Describe how total variable costs and unit variable costs behave with changes in the level of activity.
80. physics

A string under a tension of 42.6 N is used to whirl a rock in a horizontal circle of radius 2.47 m at a speed of 19.7 m/s. The string is pulled in and the speed of the rock increases. When the string is 1.13 m long and the speed of the rock is 46.9 m/s,
81. physics

A block M1 of mass 16.5 kg sits on top of a larger block M2 of mass 26.5 kg which sits on a flat surface. The kinetic friction coefficient between the upper and lower block is 0.425. The kinetic friction coefficient between the lower block and the flat
82. physics

A 33.3- kg block (m1) is on a horizontal surface, connected to a 5.1- kg block (m2) by a massless string. The pulley is massless and frictionless. A force of 220.1 N acts on m1 at an angle of 32.p deg. The coefficient of kinetic friction between m1 and the
83. physics

A 33.3- kg block (m1) is on a horizontal surface, connected to a 5.1- $kg$ block (m2) by a massless string. The pulley is massless and frictionless. A force of 220.1 N acts on m1 at an angle of 32.p deg. The coefficient of kinetic friction between m1 and
84. Statistics

Explaining confidence. A student reads that a 95% confidence interval for the mean ideal weight given by adult American women is 140 ± 1.4 pounds. Asked to explain the meaning of this interval, the student says, “95% of all adult American women would
85. KINDERGARTEN

HOMEWORK HAVE CHILDREN WRITE A ROW OF EACH LETTER AND THEN WRITE THE WORDS
86. science

how do the words matter element atom crystal compound and molacule relate
87. Algebra

I need help with solving these absolute value inequalities. I have to graph them as well. y< |x+2|+4 and y>|x+5|+3 I just don't know what to do without a coefficient in front of the absolute value!
88. childcare

write a letter to day care center supervisor requesting written permission to observe a child at the center
89. Early childhood

Teachers usually ask more of this type of question even if it is NOT recommended: A. convergent. B. divergent. C. open-ended. D. recall.
90. math

question 1 use the laws of logarithms to simplify the expression Inx(x+2)(x+1) question 2 (18m^2n+6m^3n+12m^4n^2)/ (6m^2n)
91. Chemistry

A student determined the H of neutralization of nitric acid (HN03) mixed with NaOH solution, using the procedure described in this experiment. Fifty milliliters of 1.00M HN03 was added to 50.5 mL of 1.00M NaOH solution, and the following time-temperature
92. College Physics

A uniform meter stick of mass M has an empty paint can of mass m hanging from one end. The meter stick and the can balance at a point 19.9 cm from the end of the stick where the can is attached. When the balanced stick-can system is suspended from a scale,
93. Calculus

In a test run, a new train travels along a straight-line track. Data obtained from the speedometer indicate that the velocity of the train at any time t can be described by the velocity function v(t) = 8t (0 _< t _< 30) a. Find the position function of the
94. Calculus

In a test run, a new train travels along a straight-line track. Data obtained from the speedometer indicate that the velocity of the train at any time t can be described by the velocity function v(t) = 8t (0 ¡Ü t ¡Ü 30) a. Find the position function of
95. algebra1

mr jones estimates his profit starting in 2006 will be given by the formula p=7t^2-14t+10 where t is number of years and p is the profit.if this formula is correct,when will mr.jones have a profit of more than \$1000
96. physics

After 35 minutes of running, at the 8-{\rm km} point in a 9-{\rm km} race, you find yourself 200m behind the leader and moving at the same speed. What should your acceleration be if you are to catch up by the finish line? Assume that the leader maintains a
97. english

are there any figurative language in the book Witch hunt the mysteries of salem?
98. math

the first term of a linear sequence is 5,nd d common difference is -3 find the 15 term
99. Math

If 2 cups of rice requires 4.5 cups of water, what is the total number of cups of water needed to prepare 5 cups of the same rice?
100. science

a toy car is traveling .5 meters per second.It goes 3.5 seconds. how far did it travel.

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