Inverse square law - Study guides, Class notes & Summaries

Acceleration is the measure of the change in what? a. density b. motion c. velocity d. mass e. speed - c. velocity One half second after starting from rest, a freely falling object will have a speed of about a. 20 m/s b. 10 m/s c. 5 m/s d. 2.5 m/s e. None of the above - c. 5 m/s The slope of a velocity vs. time graph tells you a. position b. maximum velocity c. average velocity d. acceleration e. maximum position - d. acceleration Which of the following is a private research la...

Which of the following radiolucent landmarks is useful when mounting films in the mandibular anterior area? - Lingual Foramen According to the inverse square law, when changing the PID length from 8 to 16 inches, the beam's intensity is - 1/4 as intense Patients should wear a thyroid collar during which type of radiographic exposure? - Intraoral radiograph Personnel radiation monitoring devices are worn to - Record the occupational exposure received by the operator The most common radio...

dark energy + evidence correct answers a mysterious repulsive force that appears to be causing the expansion of the universe to accelerate Type Ia supernovae as standard candles; Hbl law says they should be moving faster there; inverse square law for light dictates that dimmer = farther; calculated dstncs to things are even farther than their redshift predicts; they are being pushed away dark matter + evidence correct answers matter (gravity, attractive force) that does not give off electr...

NEHA REHS/RS Exam - Practice Questions With 100% Verified Answers The Inverse Square Law is commonly used in which environmental health program areas to calculate the intensity or strength of a substance at a specified distance from the point source? a. radiation, lighting, and noise b. noise, air emissions, and radiation c. radiation, fluoridation in water, lighting, and noise d. lighting, sewage contamination in stream, and air emissions - answerA If 15x + 3 = 7x - 13, then x equa...

Which of the following radiolucent landmarks is useful when mounting films in the mandibular anterior area? - Lingual Foramen According to the inverse square law, when changing the PID length from 8 to 16 inches, the beam's intensity is - 1/4 as intense Patients should wear a thyroid collar during which type of radiographic exposure? - Intraoral radiograph Personnel radiation monitoring devices are worn to - Record the occupational exposure received by the operator The most common radio...

What role do therapeutic modalities play in rehabilitation? - - decrease pain - increase ROM - improve tissue healing - improve muscle recruitment Types of Therapeutic Modalities - - thermal (heat and cold) - electromagnetic (electrotherapy, diathermy, ultraviolet, and infrared light - mechanical (traction and compression) Cryotherapy (cold/ice) - - decrease blow flow/tissue metabolism - increase threshold for pain perception *ice, cold water/packs, vapocoolant sprays Thermothe...

The radiation intensity from a point source of 99mTc is 9 mR/hr at 3 m from the source. If the distance is changed to 9 m, what is the new radiation intensity? A. 0.5 mR/hr B. 1.0 mR/hr C. 2.0 mR/hr D. 3.0 mR/hr - ANSWER B. 1.0 mR/hr The inverse square law results in the radiation intensity quadrupling if the distance from the source is halved, or it results in the radiation intensity decreasing to one fourth of its value if the distance is doubled. A technologist is sitting near a bon...

. What type of current is required for proper operation of the x-ray tube? - answer-Direct Electromagnetic radiation travels: - answer-In waves along a straight path Frequency is defined as: - answer-The number of waves passing a point per unit time Wavelength is defined as the distance from: - answer-Peak to peak of the wave Wavelength and frequency are: - answer-Inversely proportional to each other The x-ray beam changes as it travels through the patient by a process called: - answer-A...

Non-Threshold - Any dose produces a response Thermionic Emission - Filament electrons are boiled off producing an electron cloud Bremsstrahlung - AKA Breaking Radiation. Occurs when a high speed electron from the cathode is deflected by the nucleus of a target atom Characteristic Radiation - Occurs when cathode electrons dislodge inner orbit electrons from the target atoms. Anode Heel Affect - Reduction of beam intensity due to interaction with heel of target Quality - Refers to penetrati...

RADIOLOGY RHS Exam Questions with Correct Answers which of the following radiolucent landmarks is useful when mounting films in the mandibular anterior area ? - Answer-lingual foreman according to the inverse square law, when changing the PID length from 18-16 IN the beam's intensity is - Answer-1/4 as intense patients should wear a thyroid collar during which type of radiographic exposure ? - Answer-intraoral radiograph personnel radiation monitoring devices are worn to ? - Answer-...