1,314 Answered Questions for the topic physical science

Physical Science

12/21/18

Carbon burns in the presence of oxygen to give carbon dioxide. Which chemical equation describes this reaction?
carbon + oxygen + carbon dioxidecarbon + oxygen → carbon dioxidecarbon dioxide → carbon + oxygen carbon dioxide + carbon → oxygen
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Physical Science

12/21/18

What kind of chemical reaction does the chemical equation sodium + chlorine → sodium chloride represent?
CombustionDecompositionSingle ReplacementSynthesis
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Physical Science

12/20/18

speed and velocity
a car is driving west on a highway at 25 m/s. what is the car's km/h and velocity?
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Physical Science

12/17/18

do sound waves carry energy
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Physical Science

12/14/18

A force 300 N is applied to a box for 10 seconds in order to move the box 10 m. What is the power
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Physical Science

12/14/18

A person holding 30kg box 1m above the floor it down. How much work was done

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Physical Science

12/13/18

I need a step by step on how to do this problem...Anyone want to help?
What is the velocity of an 8 kg lead shot-put if it has 484 J of energy?
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Physical Science

12/13/18

Calculate her average speed in km/h.
A girl takes 30 minutes to travel around a cross-country ski course: a distance of 10 km. Calculate her average speed in km/h.
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Physical Science Solubility

12/08/18

How many grams of KNO3 can be dissolved in 200.0 mL of water at 35 Celsius
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Physical Science

12/07/18

science sounds i dont know what to do
Donna wants to calculate the speed at which a sound wave is traveling. She knows that the frequency of the wave is 680 hertz and that the wave has a wavelength of 0.5 meters.What is the speed of... more
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Physical Science

12/06/18

Which statment about a mixture is true?
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Physical Science

11/27/18

an automobile engine is 15 percent efficient. how many joules of input work are required to produce 15,000 joules of output work to move the car?
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Physical Science

11/27/18

The total amount of KE and PE contained by the particles in a sample of matter is what?
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Physical Science

10/29/18

You push a piano 5 meters across the floor with a force of 400 N. How much work have you done?
A. 2,000 JB. 19,600 JC. 80 JD. 400 J
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Physical Science Sciene

10/22/18

How do you find the acceleration of a 1,000kg car?
A force of 1500 N is applied to a 1,000 kg car. What is the acceleration of the car?
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Physical Science

10/18/18

A 52-V battery powers a pair of 36Ω resistor connected in series.What is the current flowing through the system? round to the nearest tenth
1.A 52-V battery powers a pair of 36Ω resistor connected in series.What is the current flowing through the system? round to the nearest tenth.2.A 52-V battery powers a pair of 36Ω resistor... more
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Physical Science Science

10/15/18

The actual formation of sugar occurs during the _____.
I’m very confused and can’t figure it out can someone please help me??
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Physical Science

10/15/18

A hot-air balloon contains 85,000 moles of air. To what temperature must the air be heated to fill a volume of 2500 m3 at a pressure of 100 kPa?
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Physical Science

09/20/18

Of elements in the same group those at the bottom of the periodic table have low ionization energies because?
 answer with a correct answer  
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Physical Science

09/18/18

which of the following is proper scientific notation for the number 18,200?
which of the following is proper scientific notation for the number 18,200? a. 18200 x 10^0 b. 182 x 10^2 c. 1.82 x 10^4 d. .182 x 10^5
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Physical Science

09/12/18

The distance between Connor and Mason is 75 miles. There are 1.6 km in a mile. How far is this in kilometers?
This is physical science is finding the difference between two different things
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Physical Science

09/06/18

The difference between heat and temperature is what?
This question is based of a heat and chemistry unit.
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Physical Science

09/06/18

What States of matter can fluids be?
This question is based on a heat and chemistry unit.
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Physical Science

09/06/18

a 7 kg. mass is moved across table at 25 m/sec. what force caused the acceleration?
 need help solving
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Physical Science

09/02/18

identical twins, Jill and julie. Jill and julie have the same mass. Kathy is 2.4 m from jill and 1.9 from julie. compare the gravitational interactions between
kathy is talking to two identical twins, Jill and julie. Jill and julie have the same mass. Kathy is 2.4 m from jill and 1.9 from julie. compare the gravitational interactions between kathy and... more
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