An 80 kg man is standing in an elevator which is moving down and slowing down at a rate of 2.0 m/s2. how hard must the floor of the elevator push up on the man?

2+3x=x+2x what is X

An auditorium measures 40.0 m X 20.0 m X 12.0 m. The density of air is 1.20 kg/m3. What are (a) the volume of the room in cubic feet and (b) the weight of air in the room in pounds?

A helicopter flies 30 km 30 degrees north of east, drops of the supplies to a research team; it then heads 50 degrees north of west traveling 70 km to drop the supplies to a filming crew. What is the resultant displacement of the helicopter?

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 137 ft at an angle of 31.0° above the horizontal. It then moves 137 ft at an angle of 48.0° below the horizontal.

What is the length of a box in which the minimum energy of an electron is 1.5*10^-18 J?

What is an example of when momentum is not conserved?

When a certain isotope, such as U-238, is hit by a neutron, it will always split into the same smaller nuclei. true or false?

A person walks 7 feet east stops and walks 7 feet west

Using the drop-down menus, choose the right government service to complete each sentence. Providing a free public education for all children is an example of supporting. Fighting fires is one way in which the government ensuresfor citizens.

A galilean telescope adjusted for a relaxed eye is 36cm long. If the objective lens has a focal length of 40cm, what is the magnification?