Monday
December 9, 2013

# Posts by cynthia

Total # Posts: 511

chemistry
A weather balloon if it starts with 10 liters of helium at 0km elevation and a temperature of 20 degrees. it is released and rises up through the atmosphere to an elevation of 12km where the temperature is -60degrees. calculate the volume of the helium at 12km.

Calculus
Use the given equation to answer the following questions. (Enter your answers from smallest to largest.) r = 8cos(¦È) 0 ¡Ü ¦È < ¦Ð (a) Find the points on the given curve where the tangent line is horizontal. theta= theta= (b...

Math
Carole earns 2.50 for each gadget she completes, what was her gross pay if she completed 145 gadgets last week.

Pre calculus
How do you work this problem? Find the exact value of sin 2u, cos 2u, and tan 2u given that cot u=3 and 180<u<270

health
Which age groups benefit from physical activity? A. Children B. Middle aged adults C. Older adults D. All of the above

MATH
What percentage of scores falls between +1 and +2 standard deviations?

health
What is a medical scientist,if you want to study medical science,what are the minimum requirements?and how can you briefly describe medical science?

Physics
A box rests on the back of a truck. The coefficient of static friction between box and bed of the truck is 0.255. (a) When the truck accelerates forward, what force accelerates the box? A)the inertial force B)gravity C)centripetal force D)the friction force (b) Find the maximu...

Physics
A fire helicopter carries a 520-kg bucket of water at the end of a 20.0-m long cable. Flying back from a fire at a constant speed of 40.0 m/s, the cable makes an angle of 38.0° with respect to the vertical. Determine the force exerted by air resistance on the bucket.

Chemistry
A student titrated 1.852 g of a mixture containing potassium hydrogen phthalate, KHP....? A student titrated 1.852 g of a mixture containing potassium hydrogen phthalate, KHP, with 0.163 M NaOH solution. She recorded an initial buret reading of 0.84 mL and a final buret readin...

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