Answers created by Biology_geek

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• Why does a person's face become flushed when they are working hard?
  
• A Dupuytren contracture affects which fingers?
  
• Can the heart itself be damaged by an external force, such as being struck forcefully in the chest? What would be the result of this type of injury?
  
• A sprinter runs 100 meters in 11.5 seconds. What is the runner's average running rate in meters per second?
  
• A guy drops a rock from a bridge and it hits the river 3.60s later. How high is the bridge?
  
• What are premature ventricular contractions (PVCs) of the heart? How are these treated?
  
• Which is more likely to be changed by heating a protein—its primary structure or its tertiary structure?
  
• Why are topographic maps are important?
  
• What would the topography of an area be like if the contour lines were close together, and if they were far apart?
  
• Why do you have a sour taste in your mouth when you vomit?
  
• What are some examples of smooth muscle tissue? What are some examples of skeletal muscle?
  
• How can convection help to cool your body?
  
• What is the difference between congestive heart failure and coronary artery disease?
  
• What are some examples of diffusion?
  
• If a violin and a flute each play 256 Hz tones. Which wave has the longer wavelength?
  
• How do you calculate specific heat capacity given heat flow, mass and temperature change?
  
• What are resistor combinations?
  
• Question #886c6
  
• What is a series circuit?
  
• Why is thermal expansion not visible?
  
• Question #f807e
  
• Where is the object located if the image that is produced by a concave mirror is smaller than the object?
  
• The Eiffel Tower in Paris stands 300.0 m tall on a day of average temperature, 22.0°C. How much taller is the steel tower on a hot summer day (T = 40°C) in centimeters? (αsteel = 11 x 10-6 °C-1)
  
• What is the change in length of an object when it undergoes a temperature change related to?
  
• Do sound waves travel through compression waves or longitudinal waves?
  
• Determine which of the following must change when pitch gets higher: amplitude or frequency or wavelength or intensity or speed of the sound waves?
  
• If an object is placed 25.0 cm from a concave mirror whose focal length is 5.0 cm, where is the image located?
  
• If a concave mirror with a focal length of 10.0 cm creates a real image 30.0 cm away on its principal axis, how far from the mirror is the corresponding object?
  
• Question #f8fc7
  
• Question #362a7
  
• What is the percent concentration of sodium chloride in normal saline?
  
• Question #f8f9b
  
• Question #d601d
  
• What is the angle of refraction if a ray of light passes from water into air at an angle of 30 degrees?
  
• Does refraction change the direction of light when it passes from air to glass?
  
• Is the angle of refraction measured from the boundary?
  
• What is the SI for a unit of power?
  
• How can I construct vector diagrams?
  
• Question #362b8
  
• Question #c1002
  
• Why is electric force represented as a vector?
  
• Question #516fc
  
• How does resistance in a series circuit change when more bulbs are added?
  
• Question #69c90
  
• Question #886bc
  
• How many branches can a series circuit have?
  
• Question #472fa
  
• Does the mass of a pendulum affect its period?
  
• Question #886c0
  
• Question #472ed
  
• Question #dc6b3
  
• How are work and kinetic energy related?
  
• How are inertia and mass related?
  
• Why is acceleration a vector quantity?
  
• How should all vector diagrams be drawn?
  
• How does a vector quantity differ from a scalar quantity?
  
• Question #50365
  
• Question #23b53
  
• Question #23cf8
  
• Question #4fdbb
  
• Why do scientists prefer the SI units over the old English system of measurement?
  
• Why are measurements approximations?
  
• What SI unit is energy measured in?
  
• Question #2cd1b
  
• Question #472cf
  
• Question #3845f
  
• What is the unit for the index of refraction?
  
• Question #2cd2f
  
• What is a lever?
  
• What is a pulley?
  
• Why is a ladder an inclined plane?
  
• How do a wheel and axle work?
  
• How does Newton's first law affect roller coasters?
  
• Question #72c10
  
• Question #d6019
  
• Question #6393b
  
• Question #a6abc
  
• Question #23b76
  
• Question #280e6
  
• How do you calculate the displacement of water?
  
• How do you calculate the magnitude of vectors?
  
• Question #4d966
  
• Question #5fa3a
  
• Question #2d593
  
• If object A attracts object B with a gravitational force of 5N from a given distance between the two objects is half, what is the changed force of attraction between them?
  
• How do vectors work in physics?
  
• What is a parallel circuit?
  
• Question #f749d
  
• Question #f8fe3
  
• What color light has the highest frequency?
  
• How are parallel circuits used in homes?
  
• What is the index of refraction?
  
• What is the equation for Snell's law?
  
• How do you calculate the total resistance of a parallel circuit?
  
• Question #2d583
  
• What atoms are found in carbohydrates?
  
• How many base SI units are there?
  
• How do changes of state relate to the kinetic theory?
  
• How do you convert SI units?
  
• How do the specific heats of metals compare with water?
  
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