A 1.0-kg object is moving with a constant velocity 2.0 m/s toward the north. There are two forces acting on the object. One of the forces is 2.0 N north. The other force is ________
A)
1.0 N north.
B)
3.0 N north.
C)
2.0 N south.
D)
2.0 N north.
E)
0.
C
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The collapse of the iron core of an isolated massive star produces a type II supernova
a. True b. False Indicate whether the statement is true or false
A steel bracket ABC (EI 5 4.2 106 N?m2) with span length L 5 4.5 m and height H 5 2 m is subjected to load P 5 15 kN at C. The maximum horizontal displacement of joint C is approximately:
(A) 22 mm
(B) 31 mm
(C) 38 mm
(D) 40 mm
The howler monkey is the loudest land animal and, under some circumstances, can be heard up to a distance of 8.9 km
Assume the acoustic output of a howler to be uniform in all directions and that the threshold of hearing is 1.0 × 10-12 W/m2. A juvenile howler monkey has an acoustic output of What is the ratio of the acoustic intensity produced by the juvenile howler to the reference intensity I0, at a distance of 210 m? A) 110 B) 230 C) 76 D) 170 E) 300
The particle which adds mass but no charge to the atomic nucleus is the:
A) positron. B) proton. C) neutron. D) neutrino. E) alpha particle.