1,308 Answered Questions for the topic physical science

04/27/20

Number of electrons as a function of time
Find the number of electrons as a function of time if: i(t) = 10 cos(t), to and q(to) = 0
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Physical Science

04/24/20

Describe what the American flag would look like if the only light source in the room was GREEN.
It's a question over light
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Physical Science

04/21/20

8th Grade Physical Science Question
1) Identify and represent with vector arrows, Action-Reaction Force Pairs for the 5 forces circled in red on the image.2) Your written responses should describe the action force, the equal and... more
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04/17/20

How to find the direction of a longshore current when given the direction in which waves strike the beach and the directions the beach runs to/from?
Brought to you by my science teacher who didn't teach us about longshore currents, let alone how to calculate the direction of them from this information. The exact question is "When waves from the... more
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Physical Science

04/16/20

Does bringing together the north poles of two magnets demagnetized them?
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Physical Science

04/16/20

some common alloys may include a nonmetal element
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Physical Science

04/13/20

A proton is found outside a negative nucleus
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Physical Science Physics Newtons Laws

04/10/20

Physical science questions

How does Newton’s second law apply to squirrels how does Newton’s third law apply to squirrels how do squirrels use wave energy, especially light and sound and receiving and sending
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Physical Science

04/09/20

Potentially dangerous waves with very short wavelengths and very large amounts of energy
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Physical Science Acids Bases And Salts

04/08/20

Predict whether the reaction of equal amounts of each of the following acids and bases will yield an acidic, a basic, or a neutral solution. Explain your answer for each.
a.)sulfuric acid, H2SO4 and ammonia, NH3b.) formic acid, HCOOH and potassium hydroxide, KOHc.)nitric acid, HNO3 and calcium hydroxide, Ca(OH)2
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Physical Science

04/03/20

What event will most likely occur at a divergent plate boundary?
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Physical Science

04/01/20

Need help with two physical science questions

I’m taking notes with the whole remote learning thing being new I’m still adjusting and wanted to ask if anyone has the answers to these so I can use as notes. 1) what is the relationship between... more
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Physical Science

03/28/20

I need help answering these

1) a change in velocity is...2) a change in location is....3) the product of mass and acceleration is know as?4) what is the product of mass and velocity known as? need answers ASAP please and... more
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Physical Science

03/28/20

Need help answering these
1) motion without regard to the direction of a moving object is...2) motion that considers the direction is... 3) what is the force of gravity on an object with mass?
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Physical Science Science

03/27/20

I need help answering questions about Newton’s laws
1) under what conditions will a smaller vehicle have a greater momentum than a larger vehicle?2) which requires more force to overcome static or sliding friction.3)what are the variables in... more
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Physical Science Science Chemistry Ap Chemistry

03/26/20

Chemistry- I really did help
If you have 5.40grams of potassium (K) solid how many grams of potassium hydroxide (KOH) can be produced? _2__K(s) + _2__H2O(l) 🡪 _2__KOH(aq) + ___H2 (g)If 0.251moles of H2O gas are produced, how... more
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Physical Science

03/23/20

A car starts from a speed of 18 m/s with a acceleration of5 m/s^2. Find the time neede for the car to reach 33 m/s
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Physical Science

03/19/20

Need help fast please
If a car travels 100. km in 1.0 hr and another 200. km in 1.5 hr, what is its average speed for the entire trip
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Physical Science

03/17/20

light bulb A is half as bright as light bulb B. If light bulb A has a current of 10 amps running through it what is the current in light bulb B?
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Physical Science

03/14/20

Which of the following is composed of elements and molecules suspensions matter absolute or energy
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Physical Science Science Kinetic Energy

03/14/20

Two people climbed to the roof of a building. The old person walked up a gentle ramp. The young person climbed up a steep spiral staircase. Which person did more work? Explain.
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Physical Science

03/12/20

Heat / transfer

90.0g of ethyl alcohol is mixed with 200g of water. If the mixture is heated from degrees Celsius to 78 degrees Celsius, what is the energy required to heat the mixture? Cethanol =2.3kj/degrees... more
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Physical Science

03/04/20

An airplane flies 2320 miles in 4 hours. What is it’s average speed in miles per hour?

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Physical Science

02/25/20

Physical Science math equation question

A 170.0 lb student runs up a stairway to a classroom 21.5 ft above ground level in 10.0 s. (a) How much work did the student do?  ft·lb (b) What was the average power output in hp?  hp
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Physical Science Math Science Microsoft Excel

02/20/20

What is lagging effect?
I have no idea what this question is about. I have the graph plotted but stuck at lagging effect? 'Does this plot support the theory that lead in the environment (and hence taken up by children) is... more
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