The circuit below contains 4 100-W light bulbs. The emf is 110 V. Which light bulb(s) is(are) brightest?
a.
A
b.
B
c.
C
d.
D
e.
C and D
b
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As a star's temperature increases, the frequency of peak emission also increases
Indicate whether the statement is true or false
A wheel (radius = 0.25 m) is mounted on a frictionless, horizontal axis. The rotational inertia of the wheel about the axis is 0.040 kg?m2. A light cord wrapped around the wheel supports a 0.50-kg object as shown in the figure. The object is released from rest. What is the magnitude of the acceleration of the 0.50-kg object?
?
?
a.
3.0 m/s2
b.
3.4 m/s2
c.
4.3 m/s2
d.
3.8 m/s2
e.
2.7 m/s2
The scientific method is a ___________________ by which scientists form hypotheses and test them agains evidence gathered by observation or experiment
Fill in the blank(s) with correct word
Resistance and Resistivity: A 1.0-m length of nichrome wire has a radius of 0.50 mm and a resistivity of 1.0 × 10-6 ? ? m. When this wire carries a current of 0.50 A, what is the voltage across its ends?
A. 0.0030 V B. 0.32 V C. 0.64 V D. 1.6 V