2016年8月13日 · How much force is needed to accelerate a #66# #kg# skier at #2# #m##/s^2#? Physics. 1 Answer

2018年1月23日 · How to calculate the anhydrous ammonia, from Kg to normal cubic metre in the gas state?

2016年5月29日 · In your case, gold is said to have an enthalpy of fusion equal to #"67 kJ kg"^(-1)#. This tells you that in order to melt #"1 kg"# of gold, i.e. go from solid gold at its melting to liquid gold at its melting point, you must provide it with #"67 kJ"# of heat. You're dealing with a #"1.5-kg"# sample of gold, which means that you'll need

2016年9月2日 · 9453 views around the world You can reuse this answer ...

2016年11月16日 · "6.48 kJ" The molar heat of vaporization, DeltaH_"vap", sometimes called the molar enthalpy of vaporization, tells you how much energy is needed in order to boil 1 mole of a given substance at its boiling point. In water's case, a molar heat of vaporization of "40.66 kJ mol"^(-1) means that you need to supply "40.66 kJ" of heat in order to boil 1 mole of water at its normal boiling point, i.e ...

2017年3月12日 · A = F/m = 30.44/65.0 = 0.468 ms^{-2} That is the correct answer in physics. So much the worse for whoever wrote the question is not the answer they have set! The initial velocity is irrelevant, since velocity is relative anyway. The net force acting is 30.44 N on a mass of 65 kg, so the acceleration has to be 0.468 ms^{-2}. The number of significant digits is even correct. Edit: The reminder ...

2017年4月2日 · Newton's law of gravitation states that the gravitational force between two objects is given by F=G(m_1m_2)/r^2, where G is the gravitational constant (~~6.67*10^-11 m""^3kg""^-1s""^-2), m_1 and m_2 are the mass of the objects, and r is the distance between them.

2015年3月4日 · Your patient needs "100 mg". SInce your drug's dose is expressed in mg per kg, you'll need to convert it to mg per pound first, and then determine how much a 110-lbs patient would need. 2 "mg"/"kg" * "1 kg"/"2.20462 lbs" = "0.9072 mg/lbs" then "110 lbs" * 0.9072"mg"/"lbs" = "99.8 mg" Rounded to one sig fig, the number of sig figs in 2 mg, the answer will be m_("drug") = "100 mg" You can do ...

2017年1月28日 · This will require 266.9 kJ of heat energy. To calculate the energy required to raise the temperature of any given substance, here's what you require: The mass of the material, m The temperature change that occurs, DeltaT The specific heat capacity of the material, c (which you can look up). This is the amount of heat required to raise 1 gram of that substance by 1°C. Here is a source of ...

2015年4月11日 · To calculate the de Broglie wavelength for a particle, or for a tennis ball for that matter, just use the equation p = h/(lamda), where p - the momentum of the atom; h - Planck's constant - 6.626 * 10^(-34)"m"^(2)"kg s"^(-1) lamda - wavelength; Momentum can be expressed as p = m* v, where m - the mass of the particle; v - the speed of the particle. So, starting with the electron that travels ...