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A person jumps from the roof of a house 3.4 high. When he strikes the ground below, he bends his knees so that his torso decelerates over an approximate distance of 0.70 . If the mass of his torso (
What is the electric flux through the top face of the box? (The top face of the box is the face where z=a. Remember that we define positive flux pointing out of the box.)
An electric flux of 141 N.m2/C passes through a flat horizontal surface that has an area of 0.72 m2. The flux is due to a uniform electric field. What is the magnitude of the electric field if the
A 2.32 mol sample of an ideal monatomic gas undergoes the reversible process shown in the figure. The scale of the vertical axis is set by Ts = 447 K and the scale of the horizontal axis is set by S
A thin metallic spherical shell of radius 42.1 cm has a total charge of 9.05 oC uniformly distributed on it. At the center of the shell is placed a point charge of 4.43 oC. What is the electric field
During a racing event, a 1400 kg car accelerates from 0 to 31 m/s in 4.5 s. What is the net force exerted on the car?
Standing on top of the Oread Hotel (height = 34 m) you throw a water ballon with an initial velocity of 24 m/s and 50o above the horizontal leaving the edge of the hotel. How far, in meters, from th
A projectile is fired with an initial velocity of 88m/s at an angel of 42 degrees above horizontal. At the projectile's highest point its velocity is:
The frequency of a tuning fork can be found by the method shown. A long tube open at both ends is submerged in a beaker of water, and the vibrating tuning fork is placed near the top of the tube.
A point charge +6.0uC is placed at the origin, and a second charge -3.8uC is placed in the x-y plane at (0.35m , 0.55m ). Where should a third charge be placed in the plane so that the net force act
What is the frequency of the tuning fork? The speed of sound in air is 343 m/s. Answer in units of Hz How many nodes are in the tube after the water has reached the second distance from the top of t
Two point charges, -10nC and +16nC , are held fixed a distance 0.55m apart. Assume that both charges lie on x-axis, for the -10nC x= 0 and for the +16nC charge x= 0.55 . (a) Where can a +20nC charge
A car starting at x= 75m accelerates from rest at a constant rate of 3.35m/s^2. After 4.40s its velocity is 14.74m/s. Its x position after 4.40s is:
For the automobile, determine its change in kinetic and potential energy, each in kJ. For each quantity, kinetic and potential energy, specify your choice of datum and reference value at that datum.
A patient is going to be prescribed bifocals which will be 2.00 cm from the eye. The prescribed powers (in diopters) for the bifocals are +0.80 and -1.60, and these bifocals give the patient normal
A patient has a far point of 39.5 cm and a near point of 21.4 cm. A.) What power (in diopters) should be prescribed to correct the patient's vision using a contact lens?
Grass clippings are found to have an average length of 3.8cm when a lawn is moved 10 days after the previous mowing. What is the average speed of growth of this grass in cm/days?
A block with a weight of 3.5 N is at rest on a horizontal surface. A 1.2 N upward force is applied to the block by means of attached vertical string. (a) What is the magnitude of the force of the bl
The cannon exerted an average force of 1000 Newtons on the ball during launch. Now that the ball is in the air and has almost reached its target, what is the magnitude of the net force acting on the
After flying for 15 min in a wind blowing 42 km/h at an angle of 28° south of east, an airplane pilot is over a town that is 46 km due north of the starting point. What is the speed of the airp
A cylindrical container 1.39 m tall contains mercury to a certain depth d. The rest of the cylinder is filled with water. If the pressure at the bottom of the cylinder is two atmospheres, what is th
A -10.0 nC point charge and a +20.0 nC point charge are 14.9 cm apart on the x-axis. Part A. What is the electric potential at the point on the x-axis where the electric field is zero?
Sketch the electric field in the interior and the exterior of a spherical metal shell 6 cm in radius if the shell has a net charge of +10-8 Coulombs on its surface. Find the surface charge density o
A length of aluminum wire has a resistance of 20.0 ? at 14.0°C. When the wire is warmed in an oven and reaches thermal equilibrium, the resistance of the wire increases to 36.2 (a) Neglec
Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 36 m apart. The train on the left accelerates rightward at 1.1 m/s2. The train on the right accele