Posts by alaa

Total # Posts: 17

Chemistry
Outlines an investigation into a chemical and/or physical change. 1. State the aim of the investigation. 2. Predict the results of the investigation (hypothesis). Can you please help me with those

Saddlier vocabulary
Unite 12 answer I want PDF of level b

Saddlier vocabulary
Unite 12 answer

physics
A 3.6 -kg mass attached to the end of a string swings in a vertical circle (radius = 17.9 m). When the string is horizontal, the speed of the mass is 3.8 m/s. What is the magnitude of the force of the string on the mass at this position?

physics
A 1.7 -kg object attached to the end of a string swings in a vertical circle (radius = 80 cm). At the top of the circle the speed of the object is 26.0 m/s. What is the magnitude of the tension in the string at this position?

physics
A hawk flies in a horizontal arc of radius 12.0 m at a constant speed of 7.1 m/s. It continues to fly along the same horizontal arc but increases its speed at the rate of 7.9 m/s2. Find the acceleration magnitude under these conditions.

chemistry
A dilute solution of sulfiric acid is added to 15g of copper and iron mixture. a) the volume of h2 envolved at standard conditions is 4.48L what is the mass of each of the metals constituting the mixture ? Vm=24l.mol.

Math
Juan says, "When you put together unequal groups, you can only add." Is she correct? Explain.

college physics
One athlete in a race runnng on a long, straight track with a constanct speed v1 is a distance d behind a second athlete running with a constant speed v2. (a) Under what circumstances is the first athlete able to overtake the second athlete? (Use v_1 for v1, v_2 for v2, and d ...

math
18 r4

Chemistry
THAAAAAAAAAAANK YOOOOOOU !!!!

health
Huhuhuhuhu me too

physics
A 5.30 kg package slides 1.57 m down a long ramp that is inclined at 11.8^\circ below the horizontal. The coefficient of kinetic friction between the package and the ramp is mu_k = 0.320 Calculate the work done on the package by the normal force. If the package has a speed of ...

general chemistry
naturally occuring chlorine is composed of 35CL with atomic mass of 34.969 37CL with atomic mass of 36.966 the average atomic mass id 35.453 what are the percantages of each isotope in naturally occuring chlorine ?

CHEMISTRY
melting point of mno4

Physics
Drwls is incorrect as 425/10 is 42.5 NOT 4.25! Also the measure for wave speed MUST be in m/s. Other than that it is correct.

french exam tomorrow, WHAT DO I DO?!
i want french exam for grade 6