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A candle is placed 15.74 cm in front of a convex mirror. When the convex mirror is replaced with a plane mirror, the image moves 7.0 cm farther away from the mirror. Find the focal length of the con
A second shipment contaians 7 brass and 4 steel parts and costs $54. Find the cost each type of machine part. And how much would a shipment containing 10 brass and 13 steel parts cost?
It collides and couples with three other coupled railroad cars, each of the same mass as the single car and moving in the same direction with an initial speed of1.98m/s. What is the speed of the fou
A teacher wants to interview each of his students. He needs 15 mi9nutes for each interview. How long will it take him to interview all 25 in his class in hours and minutes?
Steve traveled 200 miles at a certain speed. Had he gone 10mph faster, the trip would have taken 1 hour less. Find the speed of his vehicle.
A skier of mass 70kg is pulled up a slope by a motor driven cable. the work required to pul him 60m up a 30 degrees slope, assuming its frictionless, at a constant speed of 2.0m/s is 20.6J. What hor
A 30.0cm x 60.0cm rectangular circuit containing a 15.0olm resistor is perpendicular to a uniform magnetic field that starts out at 2.65T and steadily decreases at 0.220 T/s . While this field is ch
The electric motor of a model train accelerates the train from rest to 0.620m/s in 21.0milliseconds (ms). the total mass of the train is 875g. Find the average power delivered to the train during it
Three children delivered newspapers. Abby delivered 3 times as many as Bob. Connie delivered 13 more than Abby. The total amount of newspapers delivered was 496. How many did each child deliv
A current sensitive circuit in a portable DVD player consists of an DC power source and a lightbulb that is used as a indicator light.If we add an inductor to the circuit, would the lightbulb shineb
Tickets to a local movie were sold at $3.00 for adults and $1.50 for students. If 580 tickets were sold for a total of $1275.00, how many adult tickets were sold?
An emf is induced in a conducting loop of wire 1.10 m long as its shape is changed from square to circular. Find the average magnitude of the induced emf if the change in shape occurs in 4.10 s, and
A single conducting loop of wire has an area of 6.8 10-4 m2 and a resistance of 110 O. Perpendicular to the plane of the loop is a magnetic field of strength 0.18 T. At what rate (in T/s) must this f
A solenoid with a cross-sectional area of 1.85 10-3 m2 is 0.773 m long and has 440 turns per meter. Find the induced emf in this solenoid if the current in it is increased from 0 to 2.00 A in 44.9 m
An eagle can fly 35 kilometers per hour faster than a hummingbird. In the same amount of time an eagle can fly 8.5 kilometers and a hummingbird can fly 5 kilometers. How fast can each bird fly?
Soybean meal is 16% protein and corn meal is 9% protein. How many pounds of each should be mixed to get a 350-lb. mixture that is 12% protein?
how many women were homeless c what was the total number of homeless people - Round answers to the nearest whole number.
A 1.4 kg object at x = 2.00m and y = 3.10 m moves at 4.52m/s at an angle 45 degrees north of east. Calculate the magnitude of the objects angular momentum about an origin.
There are 93 more stamps with cancellatiom marks than stamps without cancellation marks. Let x be the number of stamps with cancellation marks. What would the equation look like?
A rotating flywheel can be used as a method to store energy. If it has 108105j of kinetic energy when rotating at 400 rad/s and if a frictional torque of 4.0 n m acts on the system, in what interval
A series RCL is at resonance and contains a variable resistor that is set to 175 ohms. The power delivered to the circuit is 2.6 W. Assuming that the voltage remains constant, how much power is deli
In an arithmetic series, the term of the series are equally spread out. If the first term in an arithmetic series is 3, and the last is 136, and the sum is 1390, what are the first 3 terms?
A 10 ohm resistor, a 12.0 microfarad capacitor, and a 17.0 mH inductor are connected in series with a 155 V generator. a) At what frequency is the current a maximum? b) What is the maximum value of
Another truck traveled from orlando toward miami at the rate of 42 mph. both trucks started traveling at the same time. how many miles did each travel before they met?
A vertical straight wire carrying an upward 28 -A current exerts an attractive force per unit length of 6.7*10^-4 N/m on a second parallel wire 6.0 cm away. What current (magnitude) flows in the sec