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1) Albert pushes a 6-kg box across a level floor. He pushes with a force of 43 newtons, and observes that the box accelerates in the direction of his push at a rate of 2 m/s2. What must be the net force acting on the box?
2) Assuming that Albert's push and the friction with the floor are the only horizontal forces acting, what must be the magnitude of the frictional force pushing backward on the box?
A glass bead has a total charge of +10 nC. A proton is located at a distance of 3 cm from the center of the glass bead. What is the direction of the force on the proton
When it rains water vapour in the air condenses into liquid water and energy is released. How much energy is released when 0.0244m of rain falls over an area of 2.59 x 10^6 m^2? If the average energy needed to heat one home for a year is 1.40 x 10^11..
A skydiver of mass m, jumps from an aircraft at an altitude of hmetres, with an initial speed of 0 m/s. She opens her parachute andlands with a final speed of v m/s. Which expression is equal to theenergy dissipated by air resistance during the jump?
two waves traveling in opposite directions along a string fixed at both ends create a standing wave described by yx t
How many items are in each subgroup described in (a)? How many subgroups are there here in total?
Two point charges are on the y-axis. A 2.5 µC charge is located at y = 1.35 cm, and a -2.18 µC charge is located at y = -1.50 cm. Find the total electric potential at the origin
A nanowire is a (nearly) one-dimensional structure with a diameter on the order of a few nanometers.
Find the minimum initial speed of a projectile in order for it to reach a height of 2201 km above the surface of the earth
A parallel-plate capacitor in air has a plate separation of 1.59 cm and a plate area of 25.0 cm2. obtain the charge on the plates before and after immersion
If the current in the circuit is 0.15 A and the resistances are R1 = 100 ? and R2 = 260 ?, what is the emf of the battery.
A copper sheet with length 1.77 m, width 0.587 m, and thickness 1.27 mm is oriented so that its largest surface area is perpendicular to a magnetic field of strength 4.93 T. What is the magnitude of the force on this sheet
In one hand you hold a 0.09 kilogram apple, in the other hand a 0.18 kilogram orange. Obtain the magnitude of the force of gravity in the orange exerts on the apple
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