1,308 Answered Questions for the topic physical science

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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Physical Science

02/10/18

the moon travels in a nearly circular path around earth. if somehow gravitation between earth and moon disappeared, how would the moon's path differ?
what will happen to the moon and earth id there was no gravitation  
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Physical Science

02/08/18

Does a cork float or sink if the density of the cork is 0.24 g/cm3 and the waters density is 1.0 cm/3?
I dont know if the cork sinks or floats in water?  
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Physical Science Biology

02/02/18

How do elements change as you move down a column in the periodic table
A. The atomic radius increases B. The number d protons decreases C. The atomic mass decreases D. The electro negativity decreases
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Physical Science

01/30/18

what are the three subatomic particals that all atoms are made of
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Physical Science

01/26/18

What was the average speed in km/h of a car that travels 58.4 km in 23.8 min?
What was the average speed in km/h of a car that travels 58.4 km in 23.8 min?
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Physical Science Science

01/23/18

How would I solve these physical science questions
The questions are:   What volume of iron has the same mass as 100 cm3 of lead? [lead= 11.4 g/cm3, iron= 7.87 g/cm3]   You buy 6 million dollars' worth of gold at $40 per gram. a. What is the... more
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