1,302 Answered Questions for the topic physical science
01/25/16
Is the following sentence true or false? Mendeleev also grouped elements that had similar properties.
Physical Science.
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01/25/16
Mendeleev noticed that patterns appeared when he arranged the elements in what way?
Physical Science.
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01/24/16
What is the atomic mass of an element?
Physical Science is hard and boring.
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01/24/16
What did Dmitri Mendeleev discover in 1869?
I need help with physical science. It is hard. my mom is too busy to help.
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01/22/16
Physical science
A 42 N horizontal force pushes on a 3.9 kg mass resting on a horizontal surface. The surface exerts a friction force of 12N against the motion. The acceleration of the 3.9 kg mass is ___ m/s^2.
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01/22/16
Physical Science
If the engines of a jet produce a force of 130,000 N, the acceleration of a 33,000 kg aircraft during takeoff is ___m/s^2.
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Physical Science Physical Science Help
01/22/16
Physical Science with Math
An 75 kg man starts from rest and after 1.45 seconds is running at a speed of 14.0 m/s. The force needed for this man to get up to this speed in 1.45 seconds is ___N.
01/22/16
Physical science question
Preparing for a turn, a bus slows down with an acceleration of -2.0 m/s^2. Calculate how much time it takes the bus to slow down from 16.0 m/s to 5.0 m/s.
Physical Science Science
01/22/16
An element has an atomic number of 71. What is it's mass?
physical science.
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Physical Science Science
01/22/16
What state of matter is Bromine in at room temperature?
Physical Science.
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Physical Science Science
01/22/16
How many neutrons are in the nucleus of an atom of Bismuth?
Another question about physical science.
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Physical Science Science
01/22/16
How many protons, electrons, and neutrons are in an atom of the element which is located in period 6, group 10?
This is another physical science question.
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Physical Science
01/22/16
What is the name of the element that has an atomic symbol Hg? How many protons does it have in its nucleus?
I have been having trouble in my physical science class lately and I need help with my homework so I can bring my grade up. Right now, my grade is a 51%. That is an F. I hate getting F's.
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Physical Science
01/19/16
Can you have two different velocities at the same time?
Δt=0 {change in time is 0vf≠vi {there are two different velocities (final velocity does not equal initial velocity)What I'm saying is this: if no time has passed, can your final and initial...
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Physical Science Physical Science Lab
01/18/16
Velocity and Air Resistance
From a Coffee Filter experiment
Why do two coffee filters reach a higher velocity in free fall than one coffee filter?
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Physical Science
01/15/16
What is the momentum of a 1,000 kg car moving at 5 m/s?
I just need help
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Physic ( Battery work ? )
Dear teacher .
I have a question :
A battery has a negative end ( I dont know if end is a right word ? ) and a positive end .
From what i have heard that there was difference in amount of...
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Physical Science
12/13/15
If you exert 200 N of force to move a box 8 meters across the living room in 2 seconds, what is your power?
A. 800 W B. 1600 W C. 80,000 W D. 400 W
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Physical Science
12/13/15
You expend 1000 W of power in moving a piano 10 meters in 5 seconds. How much force do you exert?
A. 50,000 N B. 50 N C. 500 N D. 250 N
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Physical Science
12/13/15
How much work must be done on a 20-kg go-cart to increase its speed from 5 m/s to 10 m/s?
A. 250 J B. 750 J C. 1,000 J D. 100 J
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Physical Science
12/10/15
How do i do this?
In an isolated system, two roller skaters, each with a mass of 100 kg, collide. Skater 1 was initially at rest, while Skater 2 was moving at 6 m/s. They move off together. What is their speed? A....
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Physical Science
12/10/15
Help! Help!
What will be the stopping distance for a 1,000-kg car moving 20 m/s when you apply a force of -500 N? A. 0.4 m B. 40 m C. 400 m D. 4 m
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Physical Science
12/10/15
Help very much needed!
In an isolated system, Bicyclist 1 and Bicyclist 2, each with a mass of 80 kg, collide. Bicyclist 1 was moving to the right at 8 m/s, while Bicyclist 2 was moving to the left at 2 m/s. What is the...
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Physical Science
12/10/15
I would appreciate it for your help!
In an isolated system, Bicycle 1 and Bicycle 2, each with a mass of 15 kg, collide. Bicycle 1 was moving to the right at 1 m/s, while Bicycle 2 was moving to the left at 3 m/s. What is the...
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