What is the weight of a 45 kg box in newtons

Which of the following is a simple machine?

a motor boat heads east at 16 m/s across a river that flows north at 9 m/s. what is the resultant velocity speed and directions of the boat?

Four particles, one at each of the four corners of a square with 2.0-m-long edges, are connected by massless rods. The masses are m1=m3=3.0 kg and m2=m4=4.0 kg. Find the moment of inertia of the system about the z axis.

If a 375 watt heater has a current of 5.0 A, what is the resistance of the heating element?

What theory states energy can not be created nor distroyed

What is the force on a 1-kg ball that is falling freely due to the pull of gravity

Which would react chemically by forming an ionic bond? A. 2 chlorine atoms with 7 valence electrons each B. 1 neon atom with 8 valence electrons and 1 lithium atom with 1 valence electron C.

Which of these are considered an oxidizing mutagenic agent? x-rays benzopyrene gamma rays

5. A B note has a frequency of 493.88 Hz. Calculate its wavelength in meters.

When one of the electrons of a particular atom undergoes a transition to a quantum state of lower energy, it a) collides with another of its electrons b) exchanges quantum states with another of its electrons c) undergoes a transition to a quantum