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Suppose a bar 2.5 m long expands 0.8 cm when heated. By how much will a bar 100 m long of the same material expand when similarly heated?
Suppose that we suddenly discovered that all these years we'd been wrong about the distance from Earth to the Sun, and it is actually 10% greater than we'd thought. How would that affect our estima
You leave the doctor's office after your annual checkup and recall that you weighed 683 N in her office. You then get into an elevator that, conveniently, has a scale. Find the magnitude and direct
Two ants race across a table 61 cm long. One travels at 5.06 cm/s and the other at 2 cm/s. When the first one crosses the finish line, how far behind is the second one?
Do you agree with IBM's employment response to competition from software development contractors in India, like Wipro, that are expanding into IT consulting services? Why or why not?
A 35 g bullet moving at 475m/s strikes a 2.5kg bag of flour that is on ice , at rest . the bults passes through the bag and exits it at 275m/s . how fast is the bagmoving when the bults exits?
Now suppose that the wavelength of light is 145% larger than the slit separation. How many complete dark fringes would be seen on a distant screen?
A lawn roller is rolled across a lawn by a force of 120 N along the direction of the handle, which is 34.8 above the horizontal. If the lawn roller develops 64.2 W of power for 60 s, what distance
After a heart attack, Mrs. Smith is placed on warfarin (Coumadin), 5 mg a day. What are two important patient education points to tell Mrs. Smith?
Produce a pattern of maxima and minima a distance L away from the slits. What would cause the separation between adjacent minima to decrease?
Determine the normal boiling point of a solvent on a planet whose normal atmospheric pressure is 3 bar
The plane encounters a 58.4 m/s wind from the jet stream, which blows from west to east. What is the maximum distance that the plane can travel due west and just be able to return home?
A photon of wavelength 0.13 nm is incident on a slab of carbon, and its wavelength is shifted by 0.0120% (note: that's not the same as 1.2%). Determine the incoming photon energy in electron volts.
A train at a constant 69.0 km/h moves east for 46 min, then in a direction 56.0° east of due north for 17.0 min, and then west for 58.0 min. What are the (a) magnitude (in km/h) and (b) angle (r
A 69.0 {rm kg} person stands on a lightweight diving board supported by two pillars, one at the end of the board, the other 1.50 {rm m} away. The pillar at the end of the board exerts a downward fo
The pilot of an airplane traveling 250 km/h wants to drop supplies to flood victims isolated on a patch of land 170 m below. The supplies should be dropped how many seconds before the plane is dire
The nuclide 55Ca has a half-life of 2.737 years, decaying by electron capture to 55Mn. Find the mean life and the decay constant for this radionuclide. A source of this isotope has an activity of 0
A pair of speakers separated by 0.900 m are driven by the same oscillator at a frequency of 672 Hz. An observer originally positioned at one of the speakers begins to walk along a line perpendicula
Where the free-fall acceleration is 3.7 meters per second ^2. Find the velocity with which it hits the ground. answer in units of m/s.
A 400kg ruck is moving with a velocity of 40km/h.it is stopped 25m beyond the point at which the brakes are applied. Find the retarding force
A 23 kg child sits in a swing supported by two chains, each 1.6 m long. The acceleration of gravity is 9.8 m/s2 . If the tension in each chain at the lowest point is 203 N, find the child's speed a
Write the displacement vector from aircraft 1 to aircraft 2 in "cylindrical" coordinates. That is, write a 3-component vector (r, θ, z) whose first two components are the polar coordinates of
A toy train is pushed forward and released at x_0 = 2.0 m with a speed of 2.0 m/s. It rolls at a steady speed for 2.0 s, then one wheel begins to stick. The train comes to a stop 6 m from the point
Hanging on the ladder are two masses. The first mass is 9.9 kg and is located 5% from the ladder's base. The second mass is 7.1 kg and is located 4% from the top of the ladder. What is the smallest
A candle is placed 16.0 cm in front of a convex mirror. When the convex mirror is replaced with a plane mirror, the image moves 7.5 cm farther away from the mirror. Find the focal length of the conv