1,314 Answered Questions for the topic physical science

Physical Science

02/02/14

i thought the statement
a magazine article contained the following statement: the discovery of a DNA sequence in all great apes that is identical to the same sequence in humans has proven humans evolved from lower... more
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Physical Science

01/28/14

In the abscense of air resisitance a ball player tosses a ball straight up how musch speed does the ball increase ascending decrease descending
In the absence of air resistance , a ball player tosses  a ball up straight up, how much does the speed of the ball decrease while ascending, increase while ascending,how does the time of ascent... more
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Physical Science

12/12/13

which wave diffracts the most when encountering an obstacle?
 i need help really bad!!!!!!!!!!
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Physical Science

12/04/13

(k)compounds and (i)with compounds ki
compair and contrast the properties of potassium (k)and iodine (i)with the compounds ki          
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Physical Science

12/03/13

A mixture that appears to have the same composition, color, density and taste throughout is a
quiz exam prep mixtures 
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Physical Science

11/04/13

To be valid, a scientific theory must pass several tests. State three of these tests.
I need to know the types of tests a scientific theory goes through in order to be valid.
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Physical Science

10/10/13

why is heat transfer, conduction, and convection important?
I got caught with a question I don't know how to explain. Help please!
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Physical Science

10/09/13

all chemical reactions involve_______to make and break bonds between atoms
is the answer one of the following: a.energy b.haet c.hydrogrn d.water e.acid
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Physical Science

10/08/13

solar energy from the sun travels at the speed of 299,274 km/s. what is the scientific notation using three significant digits
 i need help with my science problem and im already failing please help me!!!!!!  
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Physical Science

09/30/13

covert 250lbs to g
covert 250lbs to g
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Physical Science

09/27/13

at time = 20 s a rocket velocity is 15,000m/s, up, at time = 40 s the rocket's velocity was 17,500 m/s, up. what was its acceleration during that time?
at time = 20 s a rocket velocity is 15,000m/s, up, at time = 40 s the rocket's velocity was 17,500 m/s, up. what was its acceleration during that time? please help
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Physical Science

09/19/13

what are some things do to stay safe in the lab
-Wash Hands -Treat Animals With Care -Handle Animals Properly  
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Physical Science

09/11/13

wich of these measurments has 3 signifacant digits? a.29.3 cm b.290 cm c.0.029 cm d.290. cm
wich on is it  
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Physical Science

08/29/13

Meteorology/Physical Science Connections?
Do meteorologists need to have a knowledge of physical science? Explain...
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