Physics Force and work in Electrical, Rotational, Thermal, and Electrical Systems. sarahmarion published on January 27, 20162 responses 0 5.0★ / 5 Questions in vertical order The weight density of water is 14.7 psi 61 lb/ft3 62.4 lb/ft3 How do you measure the density of a liquid? manometer ammeter hydrometer coulombs are the variable for Type answer (6 letters) An ideal machine has a bad effiency no friction lots of pressure pressure= F/A N/m m x a What is the force like quantity in a fluid system? force pressure voltage You use a voltmeter to measure potential difference measure current measure pressure Specific gravity has a unit True False What's the conversion for celcius to fahrenheit? Type answer (9 letters) If the wind is pushing north at 20 mi/hr, and a bird is flying south at 15 mi/hr, what is the resultant of combining the two vectors? 35 5 0 What is the force-like quantity in a mechanical system? force pressure temperature difference In a real machine work out = work in work out > work in work in > work out thermal energy is measure of the average of each particle in the substance sum total of the energy of all the particles within the substance In q=mcat, what does q stand for? heat energy specific heat specific gravity What is specific heat? when an object is immersed in a fluid, the upwards force on the object is equal to the weight of the fluid displaced amount of heat required to change the temperature of one gram of a substance by 1 degree the ratio of the density of a substance to the density of water resistance is given in Type answer (4 letters) AC's voltage source is from a voltmeter a battery a generator Heat moves from hot air to cold air warm temperature to cold tempature high temperature to low temperature Which is the bigger degree? 1 degree fahrenheit 1 degree celcius If the compressor in a hydraulic lift exerts 30 psi of air on the hydraulic fluid, and the radius of the piston is 6 inches, the force is.... 3393lb 4456lb 20lbs the advantage to using a pulley is that it allows you to do less work shortens the distance reverses direction AC vs DC current changes direction periodically; current in 1 direction current in 1 direction; current changes direction periodically psi is also Type answer (22 letters) What units is torque given in? kg N x m m/s2 Newton's first law? Law of inertia Law of acceleration law of interaction Newton's third law is the law of inertia. the law of acceleration. the law of interaction. Check the advantages to a simple machine Select the three correct answers allows you to do less work reverses direction shorter distance make work easier Work is expressed in Type answer (24 letters) Archimedes Principle says: every action has a equal and opposite reaction the upwards force on the object is equal to the weight of the fluid displaced the ratio of the density of a substance is to the density of water P (atmosphere) + P (gage) = Type answer (21 letters) current is given in Type answer (7 letters) What is the force like quantity in a thermal system? force voltage temperature difference What is the force like quantity in a rotational mechanical system? force pressure torque Distance = F/a v/m m/v What is the force like quantity in an electrical system? pressure voltage force The upwards force exerted on a floating object by a fluid Type answer (8 letters) fraction of Earth weight on moon 1/10 1/6 1/4 The principle that states that a change in pressure at any point in a confined fluid is transmitted undiminished throughout a fluid Type answer (18 letters) Heat can be expressed in amps or volts calories or joules calcious or fahrenheit Characteristics of weight are Select the three correct answers lb, N slug how hard gravity pulls on a mass can change cannot change The heat required to melt a substance latent sensible calories To measure voltage, you use a barometer a multimeter an ammeter sensible heat (on the table) is horizontal diagonal vertical Efficiency is Work/mass F x d work out/ work in what's the equation for sensible heat? q=mc delta t q= m x Hv q=m x Hf What do you use to measure weight? What do you use to measure mass? balance; scale manometer; scale scale; balance T= Force x distance Mass x acceleration Force x mass work = F x d F x mass F x A Batteries are AC DC Nice