Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
An elevator (mass 4950 ) is to be designed so that the maximum acceleration is 6.00 × 10-2. What is the minimum force the motor should exert on the supporting cable?
A conducting spherical shell of inner radius 4.00 cm and outer radius 5.00 cm is concentric with the solid sphere and has a total charge of -4x10^-6 C. Find the electric field at (a) r = 1.00 cm, (b
A 75m-long train begins uniform acceleration from rest. The front of the train has a speed of 23 m/s when it passes a railway worker who is standing 170m from where the front of the train started.
The runner must then accelerate at 0.20 m /s^2 for how many seconds in order to achieve the desired time?
A glaucous winged gull, ascending straight upward at 5.20m/s, drops a shell when it is 12.5 m above the ground. A) What are the magnitude and direction of the shell's acceleration just after it is rel
A helicopter is ascending vertically with a speed of 5.00 . At a height of 100 above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground?
A popular entertainment at some carnivals is the blanket toss. A) If a person is thrown to a maximum height of 28.0ft above the blanket, how long does she spend in the air?
A 1600 kg car is traveling along a straight road at 20 m/s. Two seconds later its speed is 21 m/s. What is the magnitude of the net force acting on the car during this time?
A block with a mass m and charge q is placed in an electric field E = A i + B j where A and B are constants. If the block is released from rest at the origin at time t = 0, what are its (a) x, (b) y
A 370 mL soda can is 6.3 cm in diameter and has a mass of 21 g. Such a soda can half full of water is floating upright in water. What length of the can is above the water level?
One mole of an ideal gas does 2,600 J of work on its surroundings as it expands isothermally to a final pressure of 1.00 atm and volume of 28.0 L. (a) Determine the initial volume of the gas. Answer
Estimate the distance that the top lid of your eye moves during a blink. What is the acceleration of your eyelid? Assume it to be constant. What is your upper eyelid's final speed as it hits the bot
The woman runs at 3.95 m/s in a straight line. The dog is unleashed and runs back and forth at 5.40 m/s between his owner and the river, until she reaches the river. What is the total distance run b
Two blocks, with masses m1 = 4.6kg and m2 = 3.8 kg, are connected by a light spring on a horizontal frictionless table. At a certain instant, when m2 has an accelration a2 = 2.6 m/s squared, what is
In a women's 100m race, accelerating uniformly, Laura takes 2.00 s and Healan 3.00 s to attain their maximum speeds, which they each maintain for the rest of the race. They cross the finish line si
The engine is cut off when the lander is 5.0 m above the surface with a downward speed of 0.8 m/s. With the engine off, the lander is in free-fall. What is the speed of the lander just as it hits th
Three capacitors of capacitance 6, 6, and 4 µF respectively, are connected in series to a 2 V battery. What is the charge on the positive plate of the 6 µF capacitor?
A balloon that has Fb =12N takes up a volume of 3.3L. What must the density of the air be for the ballon to float? what would the size of the ballon be if the envelope and basket weighs 8260 N?
A mass M moves at speed V0 perpendicular to a dumbbell at rest on a frictionless horizontal table. The dumbbell consists of two masses m at the ends of a massless rod of length L.
Q1. What is the width of a slit for which the distance between two first order minima is 1 cm? The slit is illuminated by a helium neon laser(wavelength=700nm). The distance between the slit and vie
Determine the magnitude of the instantaneous acceleration of the object at time t2.
A diffraction grating is illuminated with light if wavelength 500nm. It produces the first minimum at 45 degree. Find the number of lines(slits) per mm of diffraction grating.
The position of a particle moving along an x axis is given by x = 13.0t^2 - 2.00t^3, where x is in meters and t is in seconds. Determine (a) the position, (b) the velocity, and (c) the acceleration
Two points A and B lie 20 cm apart on a line extending radially from a point charge Q. If the potential at A is 150 V and the potential at B is 120 V, find the charge Q and the distance of point A f
An object at distance s=20.0 cm from the lens has an image at distance s' from the lens. Is there a second lens with nred, nviolet, and R2 as stated above, but a different R1 so that s' due to viole