08/05/16

Determining Travel Time Across Multiple Sections
I need to know how to calculate the total time traveled by a vehicle traveling in a straight line split in 3 sections. First section is 6.1 ft, second 6.2 ft and third 24.1 ft. The vehicle has a... more
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08/04/16

What is the distance HP?
A uniform beam HK of length 10k and weighing 200N is supported at both ends. A man weighing 1000N stands at a point P on the beam. If the reactions at Holborn and K are respectively 800N and 400N.... more
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08/04/16

Calculate the apparent distance between the image of the fish and the front wall
The back wall of a home aquarium is a mirror that is a distance of 40.0 away from the front wall. The walls of the tank are negligibly thin. A fish, swimming midway between the front and back... more
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08/03/16

Light is incident from air onto the surface of a liquid.
Light is incident from air onto the surface of a liquid. The angle of incidence is 53.0 degrees, and the angle of refraction is 34.0 degrees. At what angle of incidence would the reflected light be... more
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08/03/16

plz help me out in this mechanics question
three  solid hemispheres of radii r each, are placed in contact with each other with their flat faces on a rough horizontal surface. a sphere of mass m and radius r is placed symetrically on top of... more
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08/02/16

The characteristics of convex mirrors
The problem says:An object is placed 25 cm in front of a convex mirror with a radius of curvature of 15 cm. The height of the object is 4 cm. Draw a ray diagram and find the location and the height... more
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08/02/16

A 10 µC charge is at the origin. A -5 µC charge is on the x-axis 10 cm to the right of the origin.
A 10 µC charge is at the origin. A -5 µC charge is on the x-axis 10 cm to the right of the origin. At what point other than at infinity can a 1 µC charge be placed so that there will be no net... more
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08/01/16

Word problem Help
Ben threw a rock straight up from a cliff that was 60 ft above water. If the height of the (h) after (t) seconds is given by the equation. h=-16t^2+68t+60 How long until the rock hits the... more
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08/01/16

express the answer on L
A piece of dry ice (solid carbon dioxide) with a mass of 31.5 g is allowed to sublime (convert from solid to gas) into a large balloon. Assuming that all of the carbon dioxide ends up in the... more
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08/01/16

Which solution is likely to contain the complex that has the stronger-field ligand?
Two Fe (II) complexes are both low spin but have different ligands. A solution of one is green and a solution of the other is red.    Which solution is likely to contain the complex that has the... more
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08/01/16

is a square a kite?
A square is a kite: True or False?
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08/01/16

To test for the blind spots in your eyes?
A. do not use eyeglasses unless you need them. B. focus intently on whatever you’re viewing. C. keep your eyes wide open in bright light. D. close one eye.
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08/01/16

The radiation curve of sunlight peaks in the?
A. white. B. yellow-green part of the spectrum. C.orange part of the spectrum. D. red part of the spectrum.
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08/01/16

How do I determine the rate of flux change in circuit in which 15 V is induced in a 30-turn coil?
How do I determine the rate of flux change in a circuit in which 15 volts is induced in a 30-turn coil?
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07/30/16

small changes
It is given that y = 8 - 10/x . Find the small change in x, in terms of p, when the value of y changes from 3 to 3+p.   Answer = 2p/5
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07/29/16

Find the mass
A uniform meter of mass 90g is pivoted at the 40cm mark. If the rule is in equilibrium with an unknown mass my placed at the 10cm mark and a 72g mass at the 70cm mark, determine m.
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07/29/16

What is Kepler's second law?
What is Kepler's second law?
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07/28/16

A high performance jet, mass 2450 kg, has twin jet engines. Each jet engine can develop 25 000 N of thrust. (a) What is the maximum acceleration the jet c
A high performance jet, mass 2450 kg, has twin jet engines. Each jet engine can develop 25 000 N of thrust. (a) What is the maximum acceleration the jet can sustain in a vertical climb? (b) How... more
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07/28/16

Is it possible to disrupt the electromagnetic field of atoms in a controlled way?
 Just curious since we never really"touch" things due to the electromagnetic field surrounding our atoms, would it be possible to disrupt that field in a controlled method( such as pinpoint an... more
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07/28/16

A particle is thrown with the speed u at angle(A) with the horizontal. When the particle makes an angle (B) with horizontal then what will be its speed
Motion in plane questions
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07/28/16

A person uses a 512 Hz tuning fork to find the first two resonant lengths of a closed air column in a very warm classroom. The first length measured was 17.1 cm
A person uses a 512 Hz tuning fork to find the first two resonant lengths of a closed air column in a very warm classroom. The first length measured was 17.1 cm and the second resonant length was... more
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07/28/16

(a) Give the energy transformation equation for one complete ball bounce.
(b) Explain how you could determine the efficiency with which the mechanical energy of a ball bounce is conserved.
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07/27/16

Explain the best type of connection for the following parts within an electrical circuit: series or parallel. Provide reasons for your answers.
for a 1.5 V batteries to power a 6.0 V electronic device
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07/27/16

formula V(L)=sqrt(20L) police question, I can get first part.. not sure how to do second portion
Police use the formula V (L) = sqrt(20L) to estimate the speed of a car in miles per hour, based on the length, L, in feet, of its skid marks when suddenly braking on a dry, asphalt road.At the... more
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07/27/16

Compared with the individual amplitudes of a pair of waves, the greatest amplitude that can be produced by interference is?
A. typically half their sum B. no greater than their sum C. the square of their sum D. unlimited
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