371 Answered Questions for the topic physics B

Physics B

09/12/16

A spring requires a force of 25 N to produce an extension of 2 cm in it. What is the work done in further extending it by 3 cm.
A spring requires a force of 25 N to produce an extension of 2 cm in it. What is the work done in further extending it by 3 cm.
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Physics B Physics

09/08/16

Free fall word problem
A ball is thrown upward with an initial velocity of 19.6m/s.what is the max height the ball will reach before falling back down?   Just want to check if my answer is correct, I ended up with 19.6m
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Physics B

06/16/16

inellastic collisions and velocity
a 5 kg box with a velocity of 10m/s will attach inelastically to a 5 kg box and then both boxes will attach to a 5kg box which has a velocity of 5m/s to the left. what is the end velocity
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04/02/16

2 Conceptual Questions about Fluids/Physics
1) Blood flows through an artery that is partially blocked. As the blood moves from the wider region into the narrow region, the blood speed:a) Alternately increases then decreasesb) decreasesc)... more
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Physics B

03/12/16

A fire helicopter carries a 700 kg bucket of water at the end of a 25.0 m long cable. constant speed of 43.3 m/s, the cable makes an angle of 37.7°
I need to find the air resistance. the helicopter was flying back from the fire
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Physics B Physics

03/08/16

Really Hard Physics Question
Two boxes of masses m1 and m2 are descending vertically at a constant acceleration a =g/11; they are attached by a string of negligible mass and the upper box is attached to a second string. What... more
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12/05/15

Kinetic energy of particles and objects
Calculate the rest energy and the kinetic energy of: a) A 100g ball travelling with the speed of 100m/sb) An electron travelling at a speed of 0.999c. Which one has greater rest energy? Which one... more
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Physics B Math High School Energy

11/02/15

A 45.2kg boulder falls off a mountain that is 255 m tall. What is the kinetic energy of the boulder when it falls off the cliff?
I know the answer might be 0J but I need help explaining how to get the answer
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Physics B Physics Series Circuit

05/22/15

physics question hard??
Two light circuits with identical lightbulbs. One has two lightbulbs in parallel. Other has them in series.Student 1 says series will glow brighter cuz the same current goes to both... more
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05/19/15

waves question?
There are two lines of string connected to an oscillator, one only slightly longer. The oscillator is set to vibrate at the lowest frequency, creating a standing wave in the shorter one. Will this... more
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Physics B Physics Gravity Forces

05/19/15

find gravitational force
A planet has ? the density of earth but 2x the radius. find the surface gravitational force on this planet. (Hint: Earth’s is 10N/Kg)
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05/19/15

how to do this phsyics q?
An experimenter gets a range of data: 8.8 * 10^-19 plus or minus 0.1 * 10^-19. This is an experiment about charge. Is this range of error acceptable?
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05/19/15

A child is on a object that is spinning. How can he increase the system’s rotational momentum?
a) Move away from centerb) Move toward centerc) Move in opp. direction to motiond) none of the above   what's the answer???????????
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Physics B

05/18/15

How does the concentration of carbon dioxide in the atmosphere affect climate?
How does the concentration of carbon dioxide in the atmosphere affect climate?     a) as carbon dioxide concentration increases, temperatures decrease   b) as carbon dioxide concentration... more
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Physics B

05/13/15

the equation used to calculate wavelength from a double-slit experiment
all I need is the equation and that is all
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05/07/15

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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04/02/15

An electron is moving north at a velocity V. It passes through an electric field that also points north. What happens to it’s motion?
test tmro pls help
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Physics B Math Physics Graphs

04/02/15

Object A and B have equal charges. If neutral object C touches A then B, what is the force b/w the newly charged objects A and B?
PLEASE HELP ME!!! i have a physics test tmro!!!
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Physics B Physics

02/10/14

Physics speed
A calcium ion Ca++ enters with zero velocity a region of uniform electric field of 200N/C pointing east.  What is its speed after 50ms? (Symbol of calcium atom is 20Ca40)
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Physics B Physics

02/10/14

Physics help
13. A water droplet of radius 0.018mm remains stationary in air. If the downward electric field in 150N/C, how many excess electrons must the droplet have?
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Physics B Physics

02/10/14

Physics help
An electric dipole consists of a pint charge -q at the point (0,a) and a point charge q at the pint(0,-a). Find the electric field at the point (x,0).
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