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A 83-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.2 m/s in 0.93 s. The elevator travels with this constant speed for 5.0 s, undergoes a uniform negative acceleration for 1.8 s, and then comes to rest. What does the spring scale register in each of the following time intervals?
1. before the elevator starts to move
2. through the elevator's negative acceleration.
3. through the first 0.93 s of the elevator's ascent.
4. while the elevator is traveling at constant speed.
Four identical masses of 1.7 each are located at the corners of a square with 1.7 sides. What is the net force on any one of the masses
the nucleus of 8be which consists of 4 protons and 4 neutrons is very unstable and spontaneously breaks into two alpha
A drum of chemical waste has a lid with a radius of 35.0 cm. To open the thing, a torque of 367Nm is required. With what force must you work on the thing
A uniform thin spherical shell has a raduis of 2.9 m and mass of 460kg and its center is located at the origin of a coordinate system. find the gravitional force of attraction between the two shells
A crankshaft with a diameter of 3.0 cm, rotating at 2900rpm comes to a halt in 1.20s. How many revolutions does the crankshaft make as it stops
What is the spring constant (k) of the bungee cord.At what time will the object be moving with a speed of 15 m/s.
How to calculate the efficient canyon albedo
It's possible to use the ideal-gas law to show that the density of the earth's atmosphere decreases exponentially with height, What is the weight of a column of air
Two shuffleboard disks of equal mass, one orange and the other green, are involved in a perfectly elastic glancing collision. Determine the final speed of the orange disk
A 12.0-{\rm kg} shell is launched at an angle of 55.0 ^\circ above the horizontal with an initial speed of 150 {\rm{ m/s}}. When it is at its highest point, the shell exploded into two fragments, one three times heavier than the other.
When point charges q1 = +2.1 ?C and q2 = +8.1 ?C are brought near each other, each experiences a repulsive force of magnitude 0.66 N. Determine the distance between the charges.
Eight uncharged capacitors with equal capacitances are combined in series. The combination is connected to a 6.53-V battery, Find the capacitance of each capacitor
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