An object floats on a fluid if its density is less than that of the fluid
Indicate whether the statement is true or false
TRUE
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Spherical Mirrors: A concave spherical mirror has a focal length of magnitude 20 cm. An object is placed 30 cm in front of the mirror on the mirror's axis. Where is the image located?
A. 12 cm behind the mirror B. 12 cm in front of the mirror C. 60 cm behind the mirror D. 60 cm in front of the mirror
Three resistors of 12 ?, 12 ?, and 6.0 ? are connected together, and an ideal 12-V battery is connected across the combination
What is the current from the battery if they are connected (a) in series or (b) in parallel?
A turntable has a moment of inertia of 3.0 × 10^-2 kg•m2 and spins freely on a frictionless bearing at 25 rev/min. A 0.60-kg ball of putty is dropped vertically on the turntable and sticks at a point 0.10 m from the center. By what factor does the kinetic energy of the system change after the putty is dropped onto the turntable?
a. 0.91 c. 0.83 b. 1.0 d. 1.5
How can the Doppler method be used to measure the orbital period of a planet?
A) by measuring the speed at which the star orbits the mutual center-of-mass of the star and planet B) by measuring the time it takes for the star's line-of-sight velocity to cycle from peak to peak C) by measuring the asymmetries in the velocity curve D) by measuring the amount by which the starlight is reduced when the planet transits