Plz 20 pt question 1 the block in the illustration is floating in water, which ahs a density of 1.0 g/cm^3. about 40% of the block is below water. what is the estimated density of the block? question 1 options: 0.60 g/cm^3 0.90 g/cm^3 0.40 g/cm^3 1.0 g/cm^3 question 2 what is the upward force that makes things float? question 2 options: resistance density buoyancy gravity question 3 according to pascal's principle, pressure through a fluid is question 3 options: random unmoving rigid uniform question 4 how does a wing achieve lift? question 4 options: by moving air at the same rate on the top and the bottom of the wing by forcing air to move slower over the top of the wing by forcing air to move faster over the top of the wing question 5 pressure is measured as question 5 options: force per unit area force per gram force per inch force divided by mass question 6 (1 point) question 6 unsaved if the amount of a gas in a sealed container increases, what happens to the pressure in the container? question 6 options: the pressure decreases the pressure increases the pressure stays the same

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

Part f - example: finding two forces (part i) two dimensional dynamics often involves solving for two unknown quantities in two separate equations describing the total force. the block in (figure 1) has a mass m=10kg and is being pulled by a force f on a table with coefficient of static friction îľs=0.3. four forces act on it: the applied force f (directed î¸=30â above the horizontal). the force of gravity fg=mg (directly down, where g=9.8m/s2). the normal force n (directly up). the force of static friction fs (directly left, opposing any potential motion). if we want to find the size of the force necessary to just barely overcome static friction (in which case fs=îľsn), we use the condition that the sum of the forces in both directions must be 0. using some basic trigonometry, we can write this condition out for the forces in both the horizontal and vertical directions, respectively, as: fcosî¸â’îľsn=0 fsinî¸+nâ’mg=0 in order to find the magnitude of force f, we have to solve a system of two equations with both f and the normal force n unknown. use the methods we have learned to find an expression for f in terms of m, g, î¸, and îľs (no n).

Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.