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Light is observed to converge to a point after being reflected froma plane mirror. Were the incident rays parallel, converging,or diverging prior to striking the mirror? Show a diagram to proveyour conclusion.
when a 0.20-kg block is suspended from a vertically hanging spring it stretches the spring from its original length of
A grade school student plans to build a 31-power telescope as a science fair project. What focal length is needed for her objective lens
A Carnot engine whose high-temperature reservoir is at 680{\rm K} takes in 530{\rm J} of heat at this temperature in each cycle, What is the temperature of the low-temperature reservoir
An 11g bullet is fired into an 11kg wood block that is at rest on the wood table. The block, with the bullet embedded, slides 5.11 across the table. The coefficient of kinetic friction for wood sliding on wood is 0.25.
A 1055-kg van, stopped at a traffic light, is hit directly in the rear by a 655-kg car traveling with a velocity of +2.00 m/s. What is the final velocity of each vehicle
a motor is designed to operate on 132 v and draws a current of 9.4 a when it first starts up. at its normal operating
As a freely falling object picks up downward speed, what happens to the power supplied by the gravitational force? Does it increase, decrease, or stay the same and Why.
Size of the molecule (hydrodynamic radius) and degree of polymerisation (assuming the Kuhn length for PSS is 3 ° A) and viscosity of the concentrated solutions as a function of concentration - Calculate the sphere diameter by comparing the Stokes dra..
An archeological specimen containing 3.4g of carbon has an activity of 0.33 Bq. How old (in years) is the specimen
There are two identical, positively charged conducting spheres fixed in space, find the initial charge on each sphere, q1 and q2 if initially q1
A copper block is removed from a 300°C oven and dropped into 1.00 kg of water at 20.0°C. What is the mass of the copper block
a potters wheel of radius 0.19 m is turned on at t 0 and accelerates uniformly. after 63 s the wheel has an angular
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