1,308 Answered Questions for the topic physical science

Physical Science Chemisty

12/18/16

Mass describes: a. an object's size b.the amount of matter in an object c.the type of element in an object
This is from an 8th grade book.
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Physical Science

12/05/16

Fan can accelerate from the starting blocks to running 11 m/s down the track in 5 seconds. What is her acceleration?
What is her acceleration if she runs 11 m/s down the track in 5 seconds?
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Physical Science

12/05/16

Solar cells contain a material that absorbs electrons and gives off light
I need help please. can someone please help me. please. please. please
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Physical Science

12/02/16

a pump drains a tank by performing 150000 j of work. the power rating of the pump is 1200 watts, how long does it take to drain the tank
 well i really need help because indont understand how to do this question
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Physical Science

11/26/16

A rock displaces 50 mL of water. The density of the rock is 2.5 g/cm3 . What is the mass of the rock?
I dont undertsand it  
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Physical Science

11/07/16

What is the frictional force exerted on a 500 N block that is sliding across a ceramic floor that has coefficient or kinetic friction of 0.5
What is the frictional force exerted on a 500 N block that is sliding across a ceramic floor that has coefficient or kinetic friction of 0.5
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Physical Science

11/02/16

A merry-go-round moves in a circle at a constant speed. Is the merry-go-round accelerating?
Making Conclusions Based on Acceleration
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Physical Science

10/28/16

Identify the number of protons, neutrons and electrons in 14/7 N
Question from physical science 11th edition by Bill Tillery.
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Physical Science

10/28/16

What's the period and the family in the periodic table of xenon?
Question from a physical science textbook by Bill Tillery.
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Physical Science

10/21/16

if you add solute to a dilute solution, the solution becomes a more what solution?
what isthe solution more of ?  
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Physical Science

10/18/16

What is the mass of gasoline (p=0.680g/cmto the 3rd) in a 94.6cmto the third gasoline tank
Physical science 
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Physical Science

10/05/16

how many miles will a person travel if she drives at a speed of 29.05 meters per second and travels for 3.75 hours
1 = 60   1min = 60 sec   1mile = 1,609
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Physical Science

09/22/16

An object of mass 75.0kg moves in a circle of radius 1.0m with a velocity of 2.0m/s
what is the force exerted by this object
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Physical Science

09/22/16

A 70.0 kg student runs up a stairway to a heigh of 10.0m above the ground in 10.0 s
if the work done in the process is 6860j what is the power generated by the student in kW 
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Physical Science

09/22/16

A football was kicked against a goal post with force of 250 N
if the football was in contact with the goal post for a time of 5.0 sec what is the impulse 
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Physical Science

09/22/16

A ball is thrown at an average speed of 22 m/s
how long will it take to travel a distance of 75m
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Physical Science

09/20/16

The mass of a material is 27.0 g and has the dimensions of length=15 ft, Width=20cm and height=25 in
what is the density of the material?
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Physical Science

09/20/16

Assuming you weigh 165 pounds and the distance between you and the center of the earth is 6,400 km. If the mass of the earth is 6.0x10^24kg and G=6.67x10^-11
What is the gravitational force between you and the earth?
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Physical Science

09/20/16

If you and your friend each weighs 105 kg and stand 12 m away from each other, what is the gravitational force between the two of you?
Note : G = 6.67x10^-11 N.m^2/kg^2
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Physical Science

09/20/16

A basketball is thrown at an average speed of 25 m/s. How long will it take to travel a distance of 75 m?
The homework is super confusing
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Physical Science

09/19/16

A bullet of mass 60.0 kg travels with a velocity of 125 m/s. What is the momentum of the bullet ?
I'm not very good at physical Science and I need help with my homework 
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Physical Science

09/15/16

Whats a difference between elements,compound and mixture?
I'm just studying for test and I hope someone can help me with this question please and thank you.
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Physical Science

09/14/16

Pls help ASAP
According to Boyle's law, how would you reduce a gas's volume?by decreasing its pressureby decreasing its temperatureby increasing its pressureby increasing its temperature
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Physical Science Astronomy Physics B Astrophysics

09/13/16

Astrophysics question
Object A emits most strongly at 400 nm, while object B emits most strongly at 800 nm. What can we say about their relative temperatures? A’s temperature is the same as B’s.Nothing. Temperature is... more
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Physical Science

08/26/16

a car is sitting at a stop sign. The car then goes and accelerates at 4.5 m/s^2 for 4s. How fast is the car going at the end of the 4s.
this is phsyical sceience 
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