Focal-length converging lens
How far apart are an object and an image formed by a 75 cm focal-length converging lens if the image is 2.64 X larger than the object and is real?
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A passenger train is traveling at 32 m/s when the engineer sees a freight train 384 m ahead of his train traveling in the same direction on the same track. The freight train is moving at a speed of 5.7 m/s. If the reaction time of the engineer is
Suppose a 70-kg boy and a 43-kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the acceleration of the boy toward the girl.
Some good estimates about the human body can be made if it is assumed that we are made mostly of water. The mass of a water molecule is 2.99 10-26 kg. If the mass of a person is 62 kg, estimate the number of water molecules in that person
150 grams of boiling water (temperature 100° C, heat capacity 4.2 J/gram/K) are poured into an aluminum pan whose mass is 1000 grams and initial temperature 21° C (the heat capacity of aluminum is 0.9 J/gram/K). After a short time, what is
Homologs which are heterozygous for an inversion have difficulties pairing in meiosis. During pairing homologous regions associate with one another. Consequently individual heterozygous for an inversion will form a structure known as an inversion loo
What are the major principles of psychological perspectives as they relate to criminal behavior?
An 63.0 N box of clothes is pulled 7.8 m up a 30.0° ramp by a force of 105 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.
Draw diagrams showing a situation where a bigger, moving train, vi, collides with a smaller train that is not moving. Assumer that after the collision the trains stick together.
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