A balloon is filled with 400 m3 of helium. How big a payload can the balloon lift? (The density of air is 1.29 kg/m3; the density of helium is 0.18 kg/m3.)     111 kg     129 kg     215 kg     444 kg

PW-3 An elevator motor is capable of lifting a 2,500kg elevator 50.0m with a constant speed in 12.0 seconds. a) Apply Fet ma to find the force needed to lift the elevator. b) Find the power of the elevator motor in watts and in horsepower. (1H.P.-750W) c) If the power of the elevator motor is 200H.P., find the constant speed at which the 2,500kg elevator can be raised. d) If the power of the elevator motor is 200H.P., find the constant speed at which the elevator can be raised if the elevator and its contents have a mass of 4,000kg

A tank contains 4.0m of water and is contaminated with oil (s=0.84). If the pressure at the bottom of the tank is 41 kPa, how thick is the oil in mm?

A balloon filled with helium gas has an average density of ρb = 0.31 kg/m3. The density of the air is about ρa = 1.23 kg/m3. The volume of the balloon is Vb = 0.075 m3. The balloon is floating upward with acceleration a.  Calculate the numerical value of F in N.

A large chunk of metal has a mass of 567 kg, and its volume is measured to be 0.05 m m3. (a) Find the metal's mass density (in kg/m³) and weight density (in N/m3). mass density |kg/m³ weight density N/m3 (b) What kind of metal is it? silver iron lead brass aluminum

A car with two passengers and fuel weighs 1000 kg. It has wings with an area of 16 m^2 that are designed such that air moving over them must travel 1.05 times as far as air moving under them. How fast must this plane be moving so that wings generate enough lift to offset the plane's weight? The wings are thick. Please give answer in m/s

A submersible vehicle is in ocean at a depth of 26.2 m. What is the absolute pressure (in Pa) at this depth? The density of the water in the ocean is 1.00 X 103 kg/m³, and the air above is at a pressure of 101.3 kPa. Submit your answer in exponential form.

You are making banana bread and the recipe calls for 3/4 cup of vegetable oil and one egg yolk. You measure out your oil in a measuring cup and then just toss the egg yolk into the oil before mixing with the dry ingredients. The egg yolk has a mass of 9.9 grams and floats with 71 % of its volume under the surface of the oil. You also know that the density of the oil is Poil 0.95 cm³ What volume of oil is displaced by the egg yolk? cm3 What is the total volume of the egg yolk? cm³ What is the density of the egg yolk? g cm3 Imagine the egg yolk was floating in a salt-water solution instead (Pwater = 1.04 % .). What percentage of the yolk would be submerged in water? cm³

A hollow spherical iron shell floats almost completely submerged in water. The outer diameter is 66.1 cm, and the density of iron is 7.87 g/cm³. Find the inner diameter. Number Units

A blimp is filled with 400 m3 of helium. How big a payload (in kg) can the blimp lift? (The density of air is 1.29 kg/m3 and the density of helium is 0.18 kg/m3)