The work done in lifting a 10-kilogram object to a height of 2 meters is ___ joules. A. 10 B. 20 C. 196 D. 200 相关知识点: 试题来源: 解析 D。解析:功等于力乘以距离,这里力等于重力 F = mg = 10×9.8 = 98N,距离为 2m,所以功 W = Fs = 98×2 = 196J,约为 200J。反馈...
Since the newton is itself a derived unit, a joule can be further broken down as meters squared times kilograms times meters per second per second: J = m2kgs-2 Although a joule is 1 newton-meter, energy is not normally referred to using the latter unit, to avoid confusion with the ...
which is joules per second (j/s). sometimes the power of motor vehicles and other machines is given in terms of horsepower (hp), which is approximately equal to 745.7 watts. what is average power? we can define average power as the total energy consumed divided by the total time taken....
The above example converts a collection of values from joules (J) to foot-pounds (ft·lbf). The same results can also be achieved using physical quantities instead of plain floating-point values. For example: conststd::vector<PhQ::Energy<>> energies{ {10.0, PhQ::Unit::Energy::Joule}, ...
When using the equation for the kinetic energy of a particle, in order to calculate the energy in joules, mass is expressed in which of the following units? a. picograms b. milligrams c. grams d. kilograms When a ball is hit, it travels at 24.14 meters per second. If the mass of ...
Consider an appliance that consumes 4.75 kWh of energy per day. How much energy (in joules) does this appliance consume in a year? Give the formulas and steps on how to convert fathoms into meters. What is the unit for rigidity modulus?
The speed of light in a vacuum (c) is 299,792,458 meters per second (m/s). ThePlanck constant(h) is 6.62607015 × 10-34Joule seconds (J s). Theelementary charge(e) is 1.602176634 × 10-19coulombs (C). TheBoltzmann constant(k) is 1.380649 × 10-23Joules/Kelvin(J/K). ...
Smart energy meters Electromechanical Type Induction Meter A non-magnetic and electrically conductive aluminum metal disc is made to revolve in amagnetic fieldin this type of meter. The rotation is made possible with the power passing through it. The rotation speed is proportional to the power flow...
A force of 25 N is required to stretch a spring to 0.6 meters from its natural length of 0.4 meters. If 20 joules of work is done, how far does the spring stretch from its natural length? What force is...
Isaac Newton, the man who discovered the above formula, thought that, at a given temperature and shear stress, the viscosity of a fluid would remain constant regardless of changes to the shear rate. He was only partly right. A few fluids, such as water and honey, do behave this way. We...