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A 8.70 kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.440. Determine the kinetic frictional force that acts on t
When angle=20.0 degrees, the speed of the object is 8.00 m/s. At this instant . find (a) the tension in the string. (b) the tangential and radial components of acceleration.
What is the energy of the electrons when they hit the screen? The elemental charge is 1.6 × 10 19 C and the mass of an electron is 9.11 × 10-31 kg.
The loaded cab of an elevator has a mass of 3.0 * 103 kg and moves 155 m up the shaft in 23 s at constant speed. At what average rate does the force from the cable do work on the cab?
Discuss any internet article on plate tectonics, continental drift and its effects, or seismology. Or discuss any of Earth's many cycles and evidence of their effects.
Rod A, which is 30 cm long, expands by 0.045 cm when heated from 0°C to 100°C. Rod B, also 30 cm long expands by 0.075 cm for the same change in temperature. A third Rod C, also 30 cm long
The screen is 1.70cm wide-that is, the two first-order diffraction minima are separated by 1.70cm. What is the distance between the two second-order minima?
A 400g lemming waddles horizontally off a small 4.9m high cliff with a horizontal velocity of 0.5m/s. a. How far from the base of the cliff will the lemming land?
A 25- sample of an ideal gas with is at 250 and 50 . The gas is compressed isothermally to one-third of its original volume, then heated at constant volume until its state lies on the adiabatic cur
A single electron experiences a force of 2.2 × 10-15 newtons while in the field. What is the strength of the magnetic field? The value of q = -1.6 × 10-19 coulombs.
The blood has the same heat capacity as water, determine the temperature of the blood that leaves the surface and returns to the interior.
Your cell phone battery states that it has a capacity of 1200 mAh. What is the total amount of charge in Coulombs unleashed by the battery if it is fully discharged?
A curve of radius 150 m is banked at an angle of 10 degrees. An 800 kg car negotiates the curve at 85 km/h without skidding. Find
The current flowing through the cable can be as high as 2000 A. What is the voltage across the short section of cable? Does that pose a life threat to the bird?
Bonnie and Clyde are sliding 303 {rm kg} bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 373 {rm N} of force while Bonnie pul
A 35.0-g bullet moving at 475 m/s strikes a 2.7-kg bag of flour that is on ice, at rest. The bullet passes through the bag, leaving at 250 m/s. How fast is the bag moving when the bullet exits?
A 80 kg airplane pilot pulls out of a dive by following, at a constand speed of 180 km/h, the arc of a 300 m radius circle. At the bottom of the circle, find the a) the acceleration's direction and
A 4.70 kg mass causes a vertical spring to stretch 0.850 meters. What is the maximum velocity of this mass? using the equations T=1/f and Vmax=2πA/T
The two parallel plates in the figure below are 2.0 cm apart and the electric field strength between them is 2.1 104 N/C. An electron is launched at a 45° angle from the positive plate. What is
A force of 100N is applied at an angle of 30 degrees with te horizontal. Neglecting friction, calculate the upward force the ice exerts on the crate as it's pulled.
How far (in {rm nm}) does the electron move before reaching a turning point? Because of their larger mass, the protons remain fixed during this interval of time. Note, that an accurate description o
A wheel 95.0 cm in diameter accelerates uniformly from 235 rpm to 375 rpm in 5.0 s. How far will a point on the edge of the wheel have traveled in this time?
A concave mirror (R=64 cm) is used to project a transparent slide onto a wall. the slide is located at a distance of 38 cm from the mirror. How far from the wall should the mirror be located?
Bonnie and clyde are sliding a 319kg bank safe across the floor to their getaway care. the safe slides with a constatn speed if clyde pushes from behind with 367N of force while bonnie pulls forwar
It walks 2.4 m along the boat toward shore and then stops. Assuming no friction between the boat and the water, find how far the dog is then from the shore?