Alphonse

What is the concentration of each type of ion on a 0.010 molar solution of Lithium sulfate (aq)?

15 years ago

A 0.40kg block is held against a compressed spring of stiffness 68.2N/m and compression 0.64m parallel to a 24 degree incline that is 1.27m long. The coefficient of kinetic friction between the block and the incline is 0.34. The external force holding the...

13 years ago

A simple pendulum consists of a light rod of length L = 0.9 m anchored at a fixed point (like the ceiling), and a small mass m = 0.5 kg attached to the free end. The configuration is moved to an angle θ = 39 degrees from the vertical and released from re...

12 years ago

In the configuration shown (10m incline for m1 and 8m vertical length for m2 with a spring under it, both masses are linked by a rope and a pulley at the top), the 52.0 N/m spring is unstretched, and the system is released from rest. The mass of the block...

12 years ago

You are riding a merry-go-round on the rim which is turning counterclockwise at a constant angular speed of 0.5 rad/s. Your dog sees you at the 12 o'clock position when he is at the 3 o'clock position. He starts running counterclockwise from rest with an...

12 years ago

A Ferris wheel (a vertical circle for the purposes of this question) with a radius 42.2 m is initially rotating at a constant rate, completing one revolution every 33.2 seconds. Suppose the Ferris wheel begins to decelerate at the rate of 0.0542 rad/s2. [...

12 years ago

A sphere with a moment of inertia 0.465mr2 and mass m and radius r rolls without slipping along an inclined track that is followed by a circular loop (like a roller coaster) of radius R. This happens on a planet where the acceleration due to gravity is g....

12 years ago

Two astronauts, each having a mass M are connected by a length of rope of length d have a negligible mass. They are isolated in space, orbiting their center of mass at an angular speed of ù0. By pulling on the rope, one of the astronauts shortens the tota...

12 years ago

A uniform 2.20 kg sign of height 0.600 m hangs freely from a frictionless pivot. (Its extension into the page is irrelevant: treat it as a thin uniform rod of ‘length’ 0.600 m, pivoted about one end.) You throw a point-like 0.248 kg snowball at the sign....

12 years ago

Sadly you have become trapped inside the gravity well of a star of mass M = 6.435×10^30kg. At a distance of r0 = 7.543×10^10m from the center of the star you find yourself moving directly towards it at 5.876×10^4m/s (relative to the star). How fast are yo...

12 years ago

Calculate the ratio of the kinetic energy to the potential energy of a simple harmonic oscillator when its displacement is 1/8 of its amplitude. (The answer is an integer.) Approach: Choose a specific trigonometric form for the position function x(t). It...

12 years ago

A 14.3 gram bullet embeds itself in a 2.823 kg block on a horizontal frictionless surface which subsequently collides with a spring of stiffness 378 N/m. The maximum compression of the spring is 13.5 centimetres. a) What was the initial speed of the bulle...

12 years ago

A 19.5 gram, 56.3 centimeter long steel guitar string is vibrating in its fourth harmonic. It induces a standing wave in a nearby 48.6 centimeter metal pipe open at one end. The standing sound wave in the pipe corresponds to the pipe's fundamental frequen...

12 years ago

In an interference of light experiment, coherent light that contains two wavelengths: 640 nm (red-orange) and 425 nm (indigo-blue), passes through two narrow slits separated by 5.35 μm, and the interference pattern is observed on an observation screen 2....

12 years ago

Find the most general antiderivative of the function. (Check your answer by differentiation. Use C for the constant of the antiderivative. Remember to use ln |u| where appropriate.) (x^5+x^3+8x)/x^4

12 years ago

The kinetic energy of a massive particle is equal to the energy of a photon. The massive particle moves at 1.49 % the speed of light. What is the ratio of the photon wavelength to the de Broglie wavelength of the particle? (Assume the standard nonrelativi...

12 years ago

A metal surface is struck with light of wavelength 430 nm releasing a stream of electrons. If the 430 nm light is replaced by 380 nm light of the same intensity, what is the result? a. no change to the emitted electrons b. emitted electrons are more energ...

12 years ago

A balloon with a mass of 90 kg is filled with helium (density = 0.179 kg/m3). The balloon is spherical and has a diameter of 11.0 m. What is the maximum mass that can be attached to the bottom of this this helium balloon, for it to be able to fly? The den...

12 years ago

A cylindrical wood puck (density = 0.75 g/cm3 ) is placed into a water bath. The density of water is 1.0 g/cm3. The wood puck has a diameter of 11.0 cm and a height of 3.5 cm. When the puck reaches equilibrium in the water bath, how far below the surface...

12 years ago

It's actually 2.63cm.

12 years ago

What is the work done by kinetic friction along the length of the incline? What is the work done by the spring while the block is in contact with it? What is the speed with which the block leaves the incline?

13 years ago

It gives me the wrong answer for some reason. Thanks for the help though! I appreciate it.

12 years ago

Thank you very much!

12 years ago

Yep

12 years ago

It's actually wf=wi(1/.54^2)=wi(3.43) I can't seem to get the second part though.

12 years ago

yes, it's a=(m2g-m1g-kx)/(m1+m2+(.5)(mP))

12 years ago

Do you have 5,6,7,9,10,11?

12 years ago

Thanks! Got it.

12 years ago

Thanks for the help!

12 years ago

Did you get #1 and #3?

12 years ago

Isn't the answer supposed to be in meters?

12 years ago

For some reason, it says it's the wrong answer.

12 years ago

Yeah you're right, it does work. I must have done something wrong the first time. Thanks!

12 years ago

Sorry for the late reply. Sadly, I didn't any of the ones you mentioned. Did you get #3?

12 years ago

If the puck had twice the height, how would the submerged depth change? If the puck had twice the radius, how would the submerged depth change?

12 years ago