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 upwards force exerted on a floating object by a fluid Type answer (8 letters) AC vs DC current changes direction periodically; current in 1 direction current in 1 direction; current changes direction periodically Work is expressed in Type answer (24 letters) the advantage to using a pulley is that it allows you to do less work shortens the distance reverses direction Newton's third law is the law of inertia. the law of acceleration. the law of interaction. An ideal machine has a bad effiency no friction lots of pressure You use a voltmeter to measure potential difference measure current measure pressure 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 In q=mcat, what does q stand for? heat energy specific heat specific gravity AC's voltage source is from a voltmeter a battery a generator 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) The heat required to melt a substance latent sensible calories What is the force like quantity in an electrical system? pressure voltage force What's the conversion for celcius to fahrenheit? Type answer (9 letters) Specific gravity has a unit True False Newton's first law? Law of inertia Law of acceleration law of interaction 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 How do you measure the density of a liquid? manometer ammeter hydrometer 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 Which is the bigger degree? 1 degree fahrenheit 1 degree celcius sensible heat (on the table) is horizontal diagonal vertical Heat can be expressed in amps or volts calories or joules calcious or fahrenheit psi is also Type answer (22 letters) what's the equation for sensible heat? q=mc delta t q= m x Hv q=m x Hf fraction of Earth weight on moon 1/10 1/6 1/4 resistance is given in Type answer (4 letters) In a real machine work out = work in work out > work in work in > work out Heat moves from hot air to cold air warm temperature to cold tempature high temperature to low temperature T= Force x distance Mass x acceleration Force x mass coulombs are the variable for Type answer (6 letters) What is the force like quantity in a fluid system? force pressure voltage P (atmosphere) + P (gage) = Type answer (21 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 Batteries are AC DC Nice To measure voltage, you use a barometer a multimeter an ammeter pressure= F/A N/m m x a work = F x d F x mass F x A 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 What is the force-like quantity in a mechanical system? force pressure temperature difference 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 Distance = F/a v/m m/v The weight density of water is 14.7 psi 61 lb/ft3 62.4 lb/ft3 Characteristics of weight are Select the three correct answers lb, N slug how hard gravity pulls on a mass can change cannot change Efficiency is Work/mass F x d work out/ work in current is given in Type answer (7 letters) What units is torque given in? kg N x m m/s2 What do you use to measure weight? What do you use to measure mass? balance; scale manometer; scale scale; balance 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