Ball enters the strike zone with a speed
In a Little League baseball game, the 145 {\rm g} ball enters the strike zone with a speed of 15.0 {\rm m/s}. The batter hits the ball, and it leaves his bat with a speed of 20.0 {\rm m/s} in exactly the opposite direction.
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Determined the amount of heat transferred to the air, in kJ, while increasing the temperature to 1200 K. Assume air has the constant specific heats evaluated at 300 K.
Liquid mixtures of sodium and potassium are used in some nuclear reactors as coolants that can survive the intense radiation inside reactor cores.
During the process there is a heat transfer of 60 kJ from the ideal gas to the surroundings. Determine the volume and pressure at the end of the process.
An air-water vapor mixture at 0.1 Mpa, 30°C, 80% RH has a volume of 50 m3. Calculate the specific humidity, dew point, wet bulb temperature, mass of dry air and mass of water vapor.
Estimate the moisture picked up by 1 kg of dry air, and the total enthalpy change between the entering and leaving streams expressed per unit mass of dry air. Ans. 0.0864 kJ/kg air, 220 kJ/kg air.
If the coefficient of static friction between tires and pavement is 0.55, calculate the minimum torque that must be applied to the 70 cm-diameter tire of a 980 kg automobile in order to "lay rubber" (make the wheels spin, slipping as the car accel
What percentage of the water flow rate must be supplied as make-up water to replace the water evaporated into the air stream?
The three capacitors C=2.0 uF (micro Farad) in parallel are connected across a 30- battery. A. Find the charge on each capacitor. B. Find the potential difference across each.
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If a child's achievement is below what would be expected given their level of intellectual functioning (as derived from an IQ test such as the WISC-IV)
Question: What are the 5 primary index scores that are currently part of the WISC-V (select all 5):
After reading your psychology textbook, your friend George decides that he uses primarily emotion-focused coping strategies when dealing with problems
Question: A researcher describes prior studies that investigated how reinforcement schedules influence task completion.
One prominent example that fails the "front-page test" involves Gregory Rodriguez, a former prison guard at the Central California Women's Facility,
Revise and expand on this :base on the information you have provided, construct a subjective data about a 83 year old lady from Vietnam.
You have read in your textbook (and learned in other early childhood classes), our planning is intentional for young children.