Student12

This page lists questions and answers that were posted by visitors named Student12.

Questions

The following questions were asked by visitors named Student12.

Calculate the mass of solid AgNo3 that can be added to 2.0 L of 0.10M K2CrO4 solution in order to just start precipitation? Here is what I have done so far: 2AgNO3(aq) + K2CrO4(aq) ==> Ag2CrO4(s) + 2KNO3(aq) Ag2CrO4(s) ===> 2Ag^+ CrO4^^2- Ksp = [Ag^+]^2[C...

A water wave with a wavelength of 35.6 cm approaches a wall with a large opening in it. The hole begins to close. What size does the hole in the wall need to be for the wave to noticeably diffract through the hole? Justify your answer.

A wave with an amplitude of 31 mm interferes with another wave that has the same wavelength, an amplitude of 13 mm. a) What is the maximum amplitude of the resultant wave if the two waves are in phase? b) What is the maximum amplitude of the resultant wav...

A light wave strikes a lake at an angle of incidence of 65.4 degrees. At what angle of refraction will this wave travel through the lake? (The index of refraction of water is 1.33 and the index of refraction of air is 1.00)

A plane directly east at a velocity of 860 km/h for 45 min and then travels directly west with a velocity of 720 km/h for 1h and 30 min. Find the following values for this plane, expressed in km and km/h: a) Total displacement b) Total distance c) Average...

A spaceship travels through space at a constant velocity of 3.00 x 10^2 m/s. What is the net force acting on the spaceship?

A blue billiard ball with mass m crashes into a red billiard ball with the same mass that is at rest. The collision results in the blue billiard ball travelling with a velocity of v and the red billiard ball with a velocity of 3V. In terms of v and m dete...

A 2.0kg block of wood starts at rest and slides down a ramp. Its initial height is 12.0m. If the final velocity of the block is 13m/s, determine the energy of this system that has been turned into heat.

Two boys are pulling a girl along on a tobaggan. Each boy pulls on a rope attached to the same point on the front of the tobaggan with a force of 360 N. Using a scale diagram, determine the resultant of the two forces exerted by the boys if their ropes fo...

A dedicated physics student pulls his brand new shiny red wagon along a level road such that the handle makes an angle of 50 degrees with the horizontal road. if he pulls on the handle with a force of 85N, what is the horizontal component of the force he...

What airspeed would a plane have to travel to have a groundspeed of 320 km/h [S] if there is a 50.0 km/h wind coming from the northwest?

Please write a multi-paragraph (2-3 paragraphs) expository composition of approximately 300 words with properly integrated quotes and a clear thesis statement about the character of the narrator in the story “The Gold Mountain Coat.” This is just a practi...

Strictly speaking, NO system can be completely closed - for example, hot liquid in the best thermos eventually cools down - but for most purposes a system can effectively be “closed”. How would you create a system which is more or less closed with respect...

Would a precipitate form if 200 mL of 0.006 M AgNO3 were added to 700 mL of a 0.005 M solution of K2CO3?

Answers

The following answers were posted by visitors named Student12.

I don't understand the second part. What do you mean by max 180 out of phase: subtract?

Your answers are except for the third one. Cell phones use microwaves (a type of radio waves ).

No problem Angel :)