1,314 Answered Questions for the topic physical science
Physical Science
08/21/15
Calculate the density.
Laken pipets 5.00 mL of ethanol into a flask weighing 15.25 g. She finds the mass of the flask plus ethanol is 19.17 grams. Calculate the density of ethanol alcohol.
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06/24/15
How do you convert kg/m^3 to slug/ft^3? and kg/m^3 to lb/inch^3?
I was given this worksheet in class and my professor refuses to explain it to us. I need help!!
For the given sample: Wooden cube (rectangular).
Measure its mass in grams = 171 grams.
Find...
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05/22/15
which list of elements contains only metal?
- helium, carbon, gold
- sodium, chromium, copper
- iodine, iron, nickel
-phosphorous, nitrogen, oxygen
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Physical Science
05/21/15
Considering the factors that affect gravitational pull, in which location would the gravitational pull from the earth be SMALLEST on you?
A) visiting friends at the beach
B) visiting Santa on the second floor of the mall
C) visiting Uncle Chrissy in the Himalayan Mountains
D) visiting cousin Snelfu in his submarine at the bottom...
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Physical Science
05/12/15
Hamid is viewing an image of a bird produced by a set of concave lenses. What must be true about the image?
A.It is a virtual image.
B.It is upside down.
C.It is larger than the actual bird.
D.It is capable of being projected.
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How can you manage to skip a flat stone over water?
How can you manage to skip a flat stone over water? How can you increase the number of skips? Explain how this works and how it was used in WW2 in a squadron called the Dam Busters?
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Balls, balls and shuttlecocks:
When a ball moves slowly is experiences laminar flow but when it moves fast there is turbulent airflow. What does this mean? What is the Reynolds number? Why are their dimples on a golf ball?… And...
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Physical Science
04/20/15
How much longer must the minimum length of a plane mirror be for a 6 ft 3 in man to see his complete head-to-toe image than for a 5 ft 4 in woman to do so?
Please help me solve this for physical science. Its about mirrors, lenses, rays, and convexes.
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Physical Science
04/20/15
How much longer must the minimum length of a plane mirror be for a 6 ft 3 in man to see his complete head-to-toe image than for a 5 ft 4 in woman to do so?
Hi I am an undergraduate student at Louisiana Student University Shreveport, and I am majoring in psychology.
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Physical Science
04/18/15
Approximate Temperature??
What is the approximate temperature of the Sun at its surface?
____ K
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Physical Science
04/18/15
Find the distance...
Find the distance in parsecs to Capella, which has an annual parallax of 0.077 arcsec.
____ pc
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Physical Science
04/18/15
Calculate the period T...
Calculate the period T of a planet whose orbit has a semimajor axis of 2.1 AU.
____ y
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Physical Science
04/18/15
How many light-years is that?
The famous Pleiades star cluster is about 130 parsecs distant. How many light-years is that?
____ ly
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Physical Science
04/18/15
What is the parallax of this star?
The red supergiant star in Orion is called Betelgeuse, and its distance is 130 pc. What is the parallax of this star?
____ arcsec
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Physical Science
04/16/15
How far would the planet be from the sun if...
Asteroids are believed to be material that never collected into a planet. An asteroid has a period of 6.8 years. Assuming the asteroid to be at the center of the planet if it had formed, how far...
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Physical Science
04/16/15
Calculate the length R...
Calculate the length R of the semimajor axis of a planet whose period is 231 days. ____ AU
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Physical Science
04/16/15
Calculate the period T...
Calculate the period T of a planet whose orbit has a semimajor axis of 2.1 AU.
____ y
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Physical Science
04/01/15
Which car has the greatest kinetic energy?
Car B is traveling twice as fast as car A, but car A has twice the mass of car B. Which car has the greatest kinetic energy and by what factor is it greater?
Physical Science
04/01/15
Is energy conserved???
A 0.10-kg ball is dropped from a height of 10 m and rebounds to a height of 8.0 m.
a.) Is energy conserved in the ball?
b.) If not, how much energy was lost, and what happened to it?
Physical Science
04/01/15
How much work can be done?
Given 10 kWh of electricity and assuming no losses, how much work, in joules, could be done?
Physical Science
03/30/15
What do we pay the electric company for?
What do we pay the electric company for—power or energy? In what units?
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Physical Science
03/30/15
A microwave oven has a power requirement of....
A microwave oven has a power requirement of 1,251 W. A frozen dinner requires 5.4 min to heat on full power.
(a) How much electrical energy (in kWh) is used?____ kWh(b) If the cost of electricity...
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Physical Science
03/30/15
How much does it cost?
On a particular day, the following appliances are used for the times indicated: a 1600-W coffee maker, 16 min, and a 1100-W microwave oven, 3.4 min. With these power requirements, find how much it...
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Physical Science
03/30/15
How much power in watts....
A 116-lb student races up stairs with a vertical height of 5.7 m in 5.5 s to get to a class on the second floor. How much power in watts does the student expend in doing work against gravity?____ W
Physical Science
03/30/15
How much time is spent ??
A man pushes a lawn mower on a level lawn with a force of 200 N. If 48% of this force is directed downward, and 66 W of power is expended in pushing the mower 5.0 m, how much time is spent in...
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