Mass hangs in static equilibrium in midair
A 1.8-g balloon is filled with helium gas. When a mass of 4.8 g is attached to the balloon, the combined mass hangs in static equilibrium in midair. Assuming that the balloon is spherical, what is its diameter?
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A wire with a current of 2.9 A is at an angle of 35.0 degrees relative to a magnetic field of 0.89 T. Find the force exerted on a 2.20m length of the wire.
If the string were only 1/2 as dense as you found it to be how would the tension have to change in each case to produce the same number of segments (same wavelength)?
A 0.49 copper rod with a mass of 0.18 carries a current of 13 in the positive x direction. Let upward be the positive y direction. What is the magnitude of the minimum magnetic field needed to levitate the rod?
A pipe flowing air at 1000 kPa, 300 K is connected to the tank and it is filled slowly to 1000 kPa. Find the heat transfer to reach a final temperature of 300 K.
What is the outlet pressure if the inlet pressure is 100 mm Hg and the velocity of blood is 20 cm/s. State all assumptions clearly?
Using the data below, test whether education and smoking status are independent. Run the test at a 5% level of significance. 1) Write out the appropriate null hypothesis and the alternative hypothesis; 2) Calculate the test statistic; 3) Give your
On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. How much farther would it travel on the moon then on earth?
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