Part A To determine an athlete's body fat, she is weighed first in air and then again while she's completely underwater. It is found that she weighs 690 N when weighed in air and 40.0 N when weighed underwater. What is her average density? Express your answer with the appropriate units. HA

Part A What volume of water has the same mass as 3.0 m³ of ethyl alcohol? Express your answer with the appropriate units. Vwater = Value Submit Part B Request Answer P = If this volume of water is in a cubic tank, what is the pressure at the bottom? Express your answer with the appropriate units. AI Value Units A Ć Units ? ?

Water flows from the pipe shown in (Figure 1) with a speed of 4.0 m/s.   Figure 1 of 1   Part A What is the water pressure as it exits into the air? Express your answer using four significant figures.         P� =   kPakPa   SubmitRequest Answer Part B What is the height hℎ of the standing column of water?

Consider the following section of pipe. The velocity of water (Pwater h₁ m S V₁ = 2.9 h₁ = 3.2 m V₂ = 6.7 h₂ = 1.9 m m S Point 1 = 1000 kg ) and height are given for two different points in the pipe. Use this information to answer the following questions. m What is the ratio of the cross-sectional area at point 1 to the cross-sectional area at point 2? A₁ A₂ What is the difference in pressure between points 1 and 2? (Find P2 - P₁. Include a negative sign if that's what you calculate.) P2 - P1 = Pa Which direction is the water flowing through the pipe? Point 2 h₂

A helium balloon (in the shape of a sphere) has radius 7.10 m. For the density of air, please use 1.29 kg/m^3, and for Helium, use .179 kg/m^3 Part A How much additional mass (payload) could this balloon lift? You should assume the balloon's skin, plus other parts of the balloon's structure have a total mass of 900 kg. Note however that this number does NOT yet include the mass of the helium filling the balloon, which you will need to account for! Express your answer using two significant figures. ▸ View Available Hint(s) m = for Part A for Part A undo for Part A redo for Part A reset for Part A keyboard shortcuts for Part A help for Part A Submit Constants kg

When an open-faced boat has a mass of 5250 kg , including its cargo and passengers, it floats with the water just up to the top of its gunwales (sides) on a freshwater lake. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of raising sunken treasure. Part A What is the volume of this boat? Express your answer in meters cubed. V = m³ Submit Request Answer Part B The captain decides that it is too dangerous to float with his boat on the verge of sinking, so he decides to throw some cargo overboard so that 10.0% of the boat's volume will be above water. How much mass should he throw out? Express your answer in kilograms. Πνα ΑΣφ ? Am = kg Submit Request Answer

A thin-walled hollow spherical ball of mass 0.4 kg and radius 0.1m is filled with alcohol of density 800 kg/m3. It is released from the bottom of a pool filled with water. a. sketch a FBD for the ball b. write out newtoon's 2nd law equation c. Find the acceleration of the ball

A newly constructed spaceship has a length of 100.0 m (as measured in the rest frame). This spaceship departs the Earth, bound for a distant planet located a distance D = 50.0 light-years away from the Earth. It travels at a constant speed of v = 0.900c.   Part A) As measured by Mission Control on Earth, how long does the journey take? Enter the numerical value in units of years. Part B) According to an astronaut on the spaceship, how long does the journey take? Enter the numerical value in units of years. Part C) As measured by Mission Control on Earth, what is the spaceship's apparent length? Enter the numerical value in SI units