1,314 Answered Questions for the topic physical science

Physical Science

05/15/18

Downhill skiers race over a course that's 3,500 m long in 2 minutes, 10 seconds. What is their approximate average speed for this course?
i dont get it
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Physical Science

05/10/18

if the battery is a 9-volt battery and the resistance in the circuit is 18 ohm's how much current is flowing through the circuit
can someone help me with the last problems
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Physical Science

05/10/18

if the battery is a 9-volt battery and the resistance in the circuit is 18 ohm's how much current is flowing through the circuit
i need help with these last 2 questions 
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Physical Science Chemistry

04/25/18

N2+H2=NH3 what properties does it contain
This topic is about physical science and I need help answering this question
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Physical Science

04/22/18

What is the correct chemical formula for dinitrogen tetroxide?
i honestly don’t know the answer please help
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Physical Science

04/19/18

If its volume is increased by 20% and its absolute temperature is decreased by 12%, what is the percent change to its pressure?
what is the kinetic theory of the question? I want to know the percent of to its pressure of gas.
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Physical Science

04/05/18

What’s the value of 1,152 BTU in joules
What’s the valur of 1,152 BTU in joules 
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04/03/18

What is the heat capacity of a 30.0 gram sample of matter that cools off to 25c from 100c when 100.0 grams of 20c water are added to it?
Don't know how to start it please help.
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04/03/18

How much energy needs to be removed from 25 g of 110 °C degree steam to turn it into -10 °C ice?
I am stuck on this question please help.
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Physical Science Math Help

03/20/18

what would be the square root of pi
 how would i do it
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Physical Science

03/20/18

compare and contrast how NH3 and Ca(OH)2 form OH- ions in water.
NH3 and Ca(OH)2 form OH- ions in water  
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Physical Science

03/19/18

Which of these unit systems is used by scientists
Which of these unit systems is used by scientists?
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Physical Science

03/18/18

what is the magnitude of the force needed to accelerate a object at a rate of 100m/s per second
what is the magnitude of the force needed to accelerate a object at a rate of 100 m/s per second.
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Physical Science

03/13/18

what is the speed of a vehicle that travels 20 meters in 5 seconds
physical science word problem
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Physical Science

03/12/18

A 6.21 kg block of concrete is at rest on the ground. How much work is required to lift it to a height of 7.75 m?
True or False (circle one): If the 6.21 kg block is lifted to a height of 7.75 m twice as fast as in Part (a), it takes twice the work.How high would you have to lift a 4.93 kg block to do the same... more
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Physical Science Physics

03/12/18

A ball is thrown up at 20 meters per second and it accelerates towards the ground at 10 meters per second squared. What will the velocity of the ball be in 1sec
and what will the velocity of the ball be in 3 seconds?
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Physical Science Physics

03/12/18

A windmill extracts 1000 Joules of energy from the wind and produces 100 Joules of electrical energy every 10 seconds. How much power is produced in Watts?
 And what is the efficiency of the windmill 
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Physical Science

03/05/18

what is the gravitational potential energy of a book with a mass of .5 kg sitting on a shelf 1.5 meters above the floor?
 I need help
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Physical Science

02/18/18

An iron ball is dropped from rest, it falls 250 m before hitting the ground. what is the velocity just before it hits the ground?
i need help doing my physical science work. this is an online course, therefore it can be difficult to receive help with the work. 
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02/14/18

what is the acceleration
Tanya pulls on a 2 kg rope with a force of 100 N. Keith pulls in the opposite direction with a force of 80 N. What is the acceleration of the rope? Does it accelerate towards Tanya or Keith?
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Physical Science

02/14/18

Benjamin travels at 5 m/s and then accelerates at 2 m/s^2 for 3s. What is his final velocity?
what is the velocity?  
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Physical Science

02/14/18

Cliff applies a 12 N force on a 300g object. What is its acceleration?
how do you calculate acceleration? 
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Physical Science

02/14/18

Tanya pulls on a 2 kg rope with a force of 100 N. Keith pulls in the opposite direction with a force of 80 N. What is the acceleration of the rope? Does it
how do you find the acceleration of the rope?
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Physical Science

02/14/18

Benjamin travels at 5 m/s and then accelerates at 2 m/s^2 for 3s. What is his final velocity?
how do you calculate the velocity for this question?
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Physical Science

02/14/18

Katie drives at 30 m/s for 2 hours. How far does she travel in km?
 how do you solve this? Katie drives at 30 m/s for 2 hours. How far does she travel in km?o you solve this? 
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