The mechanical equations of the model are shown in Eq ... From this, we can calculate the critical speed of resonance; when the engine speed is the same as the critical speed, resonance will occur. So ...

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US President Donald Trump on Tuesday said that the United States and Ukraine had agreed to a draft critical minerals deal that, according to the president, could be worth about $1 trillion.

ROME — Pope Francis remained in critical condition Sunday and blood tests showed early kidney failure but he remains alert, responsive and attended Mass, the Vatican said, as the 88-year-old ...

VATICAN CITY, Feb 23 (Reuters) - Pope Francis, battling double pneumonia, remains in a critical condition and his prognosis is still guarded because of the "complexity" of his clinical condition ...

Pope remains in critical condition for second day, Vatican says Francis, 88, has double pneumonia, 'complex' infection Doctors said on Saturday that prognosis is 'guarded' Pope has been in ...

Pope Francis remains in critical condition as he battles double pnuemonia, the Vatican has said. The leader of the Catholic Church’s prognosis is still guarded because of the “complexity” of ...

Pope Francis was placed in “critical condition” on Saturday, the Vatican said, just four days after the religious leader contracted pneumonia. “The condition of the Holy Father continues to ...

Fox News senior medical analyst Dr. Marc Siegel told "Fox News Live" that he is "looking very closely at the next 12 hours," as he says that time is critical. "This is a very common complication ...

ROME — Pope Francis was in critical condition Saturday after he suffered a prolonged asthmatic respiratory crisis while being treated for pneumonia and a complex lung infection, the Vatican said.