Capacitors in Combination: A system of four capacitors is connected across a 90-V voltage source as shown in the figure.(a) What is the charge on the 4.0-µF capacitor?(b) What is the charge on the 2.0-µF capacitor?
What will be an ideal response?
(a) 120µC (b) 120 µC
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An huge bear and a leaf fall from a tree through the air to the ground below. The force of air resistance is greater on the
A) bear. B) leaf. C) same on each
If a quasar has a recessional velocity of 2.7x 105 km/sec and is determined to be 3600 Mpc, what is the Hubble constant based on this quasar alone? Hint: Note that the units of your result should be (km/sec)/Mpc to see what arithmetic process you need to do on a calculator
a. 50 km/sec/Mpc b. 9.7x 108 (km/sec)Mpc c. 75 km/sec/Mpc d. 0.013 km/sec/Mpc e. 273,600 km/sec/Mpc
What makes the view of Mars in the summer of 2003 so spectacular?
A) There were huge dust storms that made the planet appear much brighter than usual. B) The feature known as Olympus Mons erupted spewing ash into the Martian atmosphere. C) Mars had an angular size comparable to the full moon. D) Mars was both at perihelion and opposition, creating the perfect viewing conditions from Earth. E) Earth's atmosphere was amazingly clear everywhere for months making the view of spectacular Mars available to everyone.
A child and an adult are walking. Their legs swing like physical pendulums and both swing through the same maximum angle. The adult is 1.5 times as tall as the child, and all their dimensions are scaled proportionately
They also have the same mass per unit volume. If the walking speed of the adult is 1.3 m/s, what is the walking speed of the child?