wally

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

Questions

The following questions were asked by visitors named wally.

A particle called neutral pi meson (or pion) decays into two photons and nothing else. If the pion is initially at rest (rest mass 135Mev). (a) what are the energies of the photons ? (b) What are the magnitudes of the momenta of the photons (c) How are th...

A 800·kg elevator is attached to a cable whose tension is 7800·N. Which of the following statements could describe the motion of the elevator? Choose all that apply. slowing down as it moves upward moving upward at constant speed speeding up as it moves d...

A hydraulic jack is used to lift a 2000 pound car. If the output piston (the one the car is sitting on) has an area of 60 square inches, how much force must be applied to the 0.5 square inch input piston to lift the car? ____ pounds?

A trapeze artist sailing through the air rotates with a rotational speed of 0.9·rev/s. If she contracts to reduce her rotational inertia to one sixth of what it was, what will her new rotational speed be? _____ rev/s? Can she completely stop her rotation...

A 7·cm tall candle is placed 125·cm from a lens with a focal length of +25·cm. Note: enter the absolute value of your answers for all distances and heights ... use the signs to determine the type and orientation of the images. a) How far from the lens wil...

The standard score for hours spent online at home for minnesotan was 3.00 approximately how many hours do minnsotan adults spend online at home? Show your work and round all cuclulation to the tenth

The following polynomial approximates the rabbit population in a particular area.? R(x)= -0.121x^5+2.952x^4+3500, where x is the number of years frm 1975. use a graphing calculator to describe the rabbit population from the rears 1975 to 1990. how do you...

A coin is tossed upward from a balcolny 370 ft high with an initial velocity of 16 ft/sec. during what interval of time? will the coin be at a height of atleast 50 ft (h= -16t^2 +vot + h0) is the answer 0>= t<+5

population of city has varied considederably in recent years. the data it the relates the pollution P to time t, in years, where t=0 correponds to 1990. use a quadratic function fitted to the data to predict the population in 2000 data: year,t population...

the volume of a gas varies inversely as its pressure and directly as its temperature. A certian gas occupies a volume of 2.3L at a temp of 380 K and a pressure of 20 N/cm^2 find the volume when the temp is 342 K and the pressure is 10 N/cm^2

at a single ticket booth, customers arrive randomly at a rate of x per hour. the average line length is given by F(x)= x^2/400-20x Where 0<= x <20. To keep the wait in line reasonable, it is required that the average line length should not exceed 10 custo...

sqrt(x) * 7sqrt(x)

1-11/x+30/x^2=0 A.the solution set is ? B.The solution set is the set of real numbers or C. the solution set is an empty set

1/(X+3)+4/(x+5)= 2/(x^2+8x+15) a. the solution set is b. the solution set is all real numbers c. the solution set is empty

a bacteria colony doubles in 7hrs. How long does it tae the colony to triple Use N=No2^t/T. where No is the intial number of bacteria and T is the time in hours it take the colony to double.

Add parentheses to make this statement true. 6-3*7+4=33

Answers

The following answers were posted by visitors named wally.

you forgot to convert form from frequency to angular velocity where 197rpm=3.28rev/s*2pi apart from that the steps are accurate

actaully my teacher put 1995=0 i forgot to put that in the problem

thank you bottom is the correct way.

are you sure it isnt 7x^2 because you woulb be multply a x*7x =7x^2 or am i wrong