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How much mass would have to be suspended from the vertical spring to stretch it the first 5.0 cm?
What is the change in potential energy if the object in the attic is brought to the basement?
Use Bernoulli's equation to estimate the upward force on an airplane's wing if the average flow speed of air is 191 m/s above the wing and 160 m/s below the wing. The density of the air is 1.1 kg/m3
A certain pendulum consists of a 1.5-kg mass swinging at the end of a string (length =2.0 m). At the lowest point in the swing the tension in the string is equal to 20N. To what maximum height above
The only force actig on a 1.8-kg body as it moves along the x axis is given y F=-(3.0x) N, where x is in m. If the velocity of the body at x=0 is v(x)=+8.0m/s, at what value of x will the body have
A point charge of 1μC is located at x = -3.0cm, and a second point charge of -11μC is located at x = 4.0cm. Where should the third charge of 6.0μC be placed so that the electric field at x
A wire loop of radius 0.50 m lies so that an external magnetic field of magnitude 0.30 T is perpendicular to the loop. The field reverses its direction, and its magnitude changes to 0.20 T in 2.0 s.
A 10.7g object moving to the right at 18.3 cm/s makes an elastic head-on collision with a 16.2g object moving in the opposite direction at 28.6 cm/s. What is the velocity of the 16.2g object after t
The transformer supplying power to an artist's light sculpture provides 9600-V AC when supplied by 120-V AC. If there are 100 turns in the transformer's primary coil, how many turns are there in its
A light bulb radiates an electromagnetic wave in all directions with a total power of 100 Watts. If you stand 5 meters away from the bulb, what is the amplitude of the magnetic field (Bmax) of the r
Two point charges attract each other with an electric force of magnitude F. If one charge is reduced to one-third its original value and the distance between the charges is doubled, what is the resu
Two lightbulbs are in series, one operating at 120 W and the other operating at 60.0 W. If the voltage drop across the series combination is 120 V, what is the current in the circuit?
A series combination of a resistor and a capacitor are connected to a 120-V rms, 69.2-Hz AC source. If the capacitance is 0.896 ?F and the rms current in the circuit is 27.9 mA, what is the resistan
The collision between a hammer and a nail can be considered to be approximately elastic. Calculate the kinetic energy acquired by a 13.9-g nail when it is struck by a 554-g hammer moving with an ini
The flywheel of a car engine is a solid disk with a mass of 8.7 kg and a radius of 22 cm and is rotating at 4000 rpm. If the entire kinetic energy of the flywheel is converted to gravitational poten
A concave spherical mirror has a radius of curvature of 4.0 meters. A real object, 5.0 cm high, is placed 3.0 meters in front of the mirror. By construction and computation determine the position an
What is the speed of the water leaving the end of the hose and what is the speed if it were traveling through a nozzle 1/3 its size?
A proton with an initial speed of 800000 m/s is brought to rest by an electric field. A) What was the potential difference that stopped the proton?
In a physics lab experiment, a compressed spring launches a 26 g metal ball at a 25 degree angle. Compressing the spring 18 cm causes the ball to hit the floor 1.6 m below the point at which it leav
A charged particle A exerts a force of 2.28 ?N to the right on charged particle B when the particles are 12.1 mm apart. Particle B moves straight away from A to make the distance between them 17.5 m
A glass rod rubbed with silk acquires a charge of +1.0×10-9 C. What is the charge on the silk?
A vertical spring (ignore its mass) is attached to a table and is compressed down 20 cm. The spring constant is 900 N/m.
Two people are carrying a uniform wooden board that is 3.40 long and weighs 160 .If one person applies an upward force equal to 40.0 at one end, at what point does the other person lift?
A 2.08 m long pole is balanced vertically on its tip. It starts to fall and its lower end does not slip. What will be the speed of the upper end of the pole just before it hits the ground?
A ceiling fan with 90-cm-diameter blades is turning at 65 rpm. Suppose the fan coasts to a stop 26 s after being turned off.