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A hiker's trip consists of three segments. Path A is 8.0 km long heading 60 degrees north of east. Path B is 7.0 km long in a direction due east. Path C is 4.0 km long heading 315 degrees counterclo
Your roommate says that the concept of homeostasis is being violated when the rate of respiration goes up during exercise, because the rate of respiration clearly is not held constant. Explain why his
A ball of mass 5.5 kg moving with speed of 1.8 m/s in the +x-direction hits a wall and bounces back with the same speed in the -x-direction. What is the change of momentum of the ball?
A hockey puck moving at 0.45 m/s collides elastically with another puck that was at rest. The pucks have equal mass. The first puck is deflected 37 degrees to the right and moves off at speed .36 m
Calculate the number of WBC if the dilution is 1:20. The cells were counted in two (2) RBC squares and the values were 12 and 8 respectively.
in an industrial cooling process, water is circulated through a system. if the water is pumped with a speed of 0.45 m/s under a pressure of 400 torr from the first floor through a 6 cm diameter pipe
The mass of a paper clip is approximately
Airtight box has a removable lid of area 1.0 10-2m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 0.85 105Pa. The inside of the box is completely e
A 131-kg sign hangs between two buildings by two cables. Cable 1 is attached at a 36 degree angle wrt to the horizontal, and Cable 2 is attached at a 24 degree angle wrt to the horizontal. What is
Two stationary positive point charges, charge 1 of magnitude 3.35 and charge 2 of magnitude 1.75 , are separated by a distance of 30.0 . An electron is released from rest at the point midway betwee
The position of the flower on the stem of garden pea is governed by a pair of alleles.
A 53.5-g Super Ball traveling at 26.0 m/s bounces off a brick wall and rebounds at 21.5 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 4.25 ms, what is the
Hypothesis-1 consider the two ideas given above as hypothesis.Design a single investigation to test whether these hyphotheses are correct
A bucket filled with water has a mass of 48 kg and is attached to a rope that is wound around a 0.080 m radius cylinder. What torque does the bucket produce around the center of the cylinder?
A 35g sample of ethanol is dissolved in 115g water. What is the concentration of the ethanol, expressed as grams ethanol per 100g solution .
The energy required to drive the Calvin cycle is provided by ATP and NADPH.
A cylindrical container 2.0 tall contains mercury to a certain depth. The rest of the cylinder is filled with water. If the pressure at the bottom of the cylinder is two atmospheres, what is the de
What minimum horsepower must a motor have to be able to drag a 320 box along a level floor at a speed of 1.10 if the coefficient of friction is 0.50?
The standard free energy change for the hydrolysis of ATP is -30.5 kJ/mol. Measurements in rat livercells indicate that the concentrations for both ATP and ADP are 8 mM and for inorganic phosphate is
A 1.00 kg ball strikes a wall with a velocity of 7.5 m/s to the left. The ball bounces off with a velocity of 2.0 m/s to the right. If the ball is in contact with the wall for 0.15 s, what is the co
An airtight box has a removable lid of area 1.1 multiplied by 10-2m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 0.80 multiplied by 105Pa. The in
An aerobatic airplane pilot experiences "weightlessness" at the top of a loop-the-loop maneuver. If her speed is 200 m/s at the time, find the radius of the loop.
Evidence suggests that bacteria supplied with a cup of sugar could run a 60-watt light bulb for 17 hours. which of these was most likely used to affirm this scientific idea?
An extension cord made of two wires of diameter 0.129cm (no. 16 copper wire) and of length 2.7m (9ft) is connected to an electric heater which draws 15.0A on a 120-V line. How much power is dissipat
A 107.0 N grocery cart is pushed 14.0 m along an aisle by a shopper who exerts a constant horizontal force of 40.0 N. If all frictional forces are neglected and the cart starts from rest, what is t