1,308 Answered Questions for the topic physical science

Physical Science

02/05/16

if sarah swims at an average speed of 8 meters per second. how far will she go in 25 seconds?
i really need to learn how to sovle these kind of problems.  
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Physical Science

02/01/16

Throw ten coins onto a flat surface. Move aside all the coins that landed tails-up. Collect the remaining coins. After tossing them once again, remove all coins
Throw ten coins onto a flat surface. Move aside all the coins that landed tails-up. Collect the remaining coins. After tossing them once again, remove all coins landing tails-up. Repeat this... more
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Physical Science Science

01/30/16

Science Questio.
The total energy of a 3.0kg falling rock is 5000J. If its potential energy is 1,985J, the kinetic energy of the rock is___J.
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Physical Science Science

01/30/16

Science Questions
If the distance from the Sun varied during an asteroid's orbit, would its kinetic energy change? Would its potential energy change? Would the total energy (sum of kinetic and potential energy) of... more
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Physical Science

01/25/16

Will the honey packet take in water? Why or why not? If so, what's that process called?
There's an experiment I'm doing called the magic ketchup experiment. I would like to know what process would allow water to get inside the packet. Me and my dad are doing this experiment and he... more
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Physical Science Science Vocabulary School Work

01/25/16

What does the word periodic mean?
Science and Vocab.
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Physical Science Science School Work School

01/25/16

Is the following sentence true or false? Mendeleev also grouped elements that had similar properties.
Physical Science.
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Physical Science Science School Work School

01/25/16

Mendeleev noticed that patterns appeared when he arranged the elements in what way?
Physical Science.
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Physical Science Science School Work School

01/24/16

What is the atomic mass of an element?
Physical Science is hard and boring.
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Physical Science Science School Work School

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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Physical Science Math Physical Science Help

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.
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Physical Science Math Help Homework Tips

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.    
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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... more
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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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Physical Science Physics Battery

12/27/15

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... more
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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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