Crime scene as the siren approaches
A cop car drives at 30 m/s toward the scene of a crime, with its siren sounding (f = 2125 Hz.) Calculate the frequency heard by people at the crime scene as the siren approaches and the frequency heard as the siren moves away from the people.
Expected delivery within 24 Hours
A firefighter of mass 89 kg slides down a vertical pole with an acceleration of 3 m/s2. The acceleration of gravity is 10 m/s2 . What is the friction force that acts on him? Answer in units of N.
if the bucket is raised to the top of the well and released, what is the acceleration of the bucket as it falls toward the bottom of the well? (assume rope's mass is negligible, that cylinder turns on frictionless bearings and that g = 9.8m/s^2
Light of wavelength 520 nm is incident normally on a diffraction grating. Determine the total number of primary maxima that can be observed in this situation.
A simple harmonic oscillator consists of a block of mass 3.50 kg attached to a spring of spring constant 210 N/m. When t = 2.30 s, the position and velocity of the block are x = 0.140 m and v = 2.810 m/s.
a circular plate with radius 1.26 m contains 724 μC of a charge uniformly distributed. Find the magnitude of the electric field near the plate.
The small currents in axons corresponding to nerve impulses produce measurable magnetic fields. A typical axon carries a peak current of 0.040mu*A. What is the strength of the field at a distance of 2.5 mm?
An opaque card is then introduced covering only the upper half of the lens. What happens to the image on the screen?
A severe thunderstorm dumps 1.5 in. of rain in 30 min on a town of area 38 km2. What volume of water, in acre-feet, fell on the town?
1933636
Questions Asked
3,689
Active Tutors
1445107
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
Following current events related to immigration reform, a group of students came to school wearing t-shirts representing national flags
A student notifies you that she has been subjected to bullying through a classmate's Facebook page. Write of 500 words in which you address the following:
Assignment Task: Technological advances have significantly enhanced the ability to efficiently collect and analyze evaluation data.
As you come to the close of your study of World Religions, it has become evident over the past two weeks that religions will continue to have a place
What do you believe about the purpose of classroom management? How will these beliefs influence the rules and expectations you set?
As educators, we are always trying to improve ourselves as well as our professional approach. One needs to reflect on our personal needs and areas of profession
What is the purpose of the flyer? What all services does your program offer for infants and toddlers? Who is your audience?