1,314 Answered Questions for the topic physical science

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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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.... more
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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... more
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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... more
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Physical Science

12/07/15

Find the power of 10-v line that carries a 1000 ma current?
Find the power of 10-v line that carries a 1000 ma current
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Physical Science

11/19/15

Find the distance traveled before take off.
please help me answer this problem A cebu pacific plane bound for kuala lumpur Malaysia accelerate on a running from rest to 3.22 m/s2 for 32.0 s until finnaly takes off. Find the distance... more
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Physical Science Wave Lengths

11/09/15

What is the period of a wave with a frequency of 3 Hz and an amplitude of 0.01 m?
A. 0.030s B. 300s C. 0.33s D. 0.0033s
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Physical Science Science

11/09/15

12. Explain properties of ionic compounds.
 Need help with study guide
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Physical Science

11/06/15

a coyote accelerates 4m/s2 from an initial velocity of 2m/s for 6 seconds. how far does the coyote run?
need the answer for this question.  
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Physical Science

11/04/15

list four types of information that you can learn from the periodic table
 list four types of information that you can learn from the periodic table  
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Physical Science

11/04/15

list four types of information that you can learn from the periodic table
 list four types of information that you can learn from the periodic table
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Physical Science

10/27/15

a force of 450n is applied to a 9kg object. how fast will it accelerate
 newton's second law  
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Physical Science Science Biology Photosynthesis

10/26/15

Biology Lab - Absorbance vs. Light Intensity
Hello,   I recently performed a photosynthesis experiment regarding change in absorbance over time vs. intensity of light. 4 tubes of solutions containing chloroplasts, .1M PO4 buffer, water, and... more
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Physical Science

09/27/15

How far can a man travel in 3.0 hrs if he walking at a speed of 2.0 m/s
I need help on this because I don't get it 
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Physical Science

09/20/15

A car set from rest then travel west for 5 sec and achieves a speed of 60m/sec. What is acceleration of the car
A car set from rest then travel west for 5 sec and achieves a speed of 60m/sec. What is acceleration of the car
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Physical Science

09/15/15

The tendency of an object to resist any change of motion is known as
intertia force mass  balance
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Physical Science

09/08/15

An asteroid has a period of 3.4 years. Assuming the asteroid to be at the center of the planet if it had formed , how far would the planet be from the sun?
 I was asked this question in my physical science class.  I don't understand how to get the answer? Please help. Thanks in advance!!!   Asteroids are believed to be material that never collected... more
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Physical Science

08/30/15

A ball dropped from a building falls for 4.0 s before it hits the ground. What was its velocity an instant before impact
help solve because i am having trouble getting the answer
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