Physics W8- 25 Questions

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QUESTION 1
1.
How multifarious neutrons are done?
A. 3.
B. 1.
C. 2.
D. 12.
4 summits
QUESTION 2
1. An speck has 97 protons and 251 nucleons. If it undergoes alpha waning, what are the calculate of protons and nucleons, respectively, in
the daughter center?
A. 94, 247
B. 95, 247
C. 96, 245
D. 100, 249
4 summits
QUESTION 3
1. An electron is unyielding from interval to a despatch of 7.89 x 106 m/s, what implicit contrariety did it peevish?
A. 512
V
B. 177
V
C. 300 V
D. 295 V
4 summits
QUESTION 4
1. A magnetic substitution of 50 Wb increases to 100 Wb in 10 prevents, what is the promotive emf?
A. 10.0
V
emf is promotive
C. 5.0 V
D. 12.0 V
B. No
4 summits
QUESTION 5
1.
The is-sue character of a embodied is 3.5 eV. If the embodied is the illuminated with etiolated imponderous (l = 300 nm), what are:
a) the halt implicit
b) the cutoff frequency
Path: p
Words:0
4 summits
QUESTION 6
1.
A circumference has span resistor in order. The principal is 1000
resistor?
and the prevent is 10,000
. If the applied voltage is 12.0 V what is the agency dissipated in each
Path: p
Words:0
4 summits
QUESTION 7
1.
Distinguish the mold. If allure vigor on the 1 nC enjoin is referablehing. What is q? (n is nano and media 10 -9)
A. 1.0
nC
B. 0.75 nC
C. 12.0 nC
D. 0.68 nC
4 summits
QUESTION 8
1. A radioactive pattern has a half-life of 2.5 min. What concern of the pattern is left succeeding 40 min?
A. 1/8
B. 1/65,536
C. 1/256
D. 1/16
4 summits
QUESTION 9
1. A radioactive pattern has a half-life of 10.0 min. If the pattern wane by a ingredient of 1/16 how ample date has passed?
A. 20.0
min
B. 15.0 min
C. 40.0 min
D. 10.0 min
4 summits
QUESTION 10
1.
Calculate the stringent essential-quality of
Path: p
Words:0
4 summits
QUESTION 11
1.
In the nuclear reaction e- e (usurp the particles are referable moving to commence with), what is the allure essential-quality released in keV?
A. 1,000,000
keV
B. 511
keV
C. 100 keV
D. 1022 keV
4 summits
QUESTION 12
1. The essential-quality of a 2.00 keV electron is known to among ±3.00%. How precisely can its collocation be measured?
A. 2.1 x 10-30 m
B. 8.4 x 10-30 m
C. 3.0 x 10-20 m
D. 1.5 x 10-10 m
4 summits
QUESTION 13
1.
If 4.0 × 1018 specks waning with a half-life of 9.2 years, how multifarious are fostering succeeding 15.2 years?
A. 1.5 × 1018
B. 7.6 × 1017
C. 1.3 × 1018
D. 1.7 × 1017
4 summits
QUESTION 14
1. If the vigor betwixt span enjoins wanes by a ingredient of 100 consequently the enjoins are moved exalt secret?
A. 8
B. 10
C. 2
D. 16
4 summits
QUESTION 15
1. If imponderous is traveling from a embodied with an protest of reconcern of 1.57 into zeal, what is the ticklish disposition restraint completion inside meditation?
A. 12.1o
B. 39.6o
C. 97.3o
D. 15.9o
4 summits
QUESTION 16
1. If a crave ordinary carrying wire created a magnetic arena of 1.2 x 10-7 T, what is the ordinary if you are 12.0 cm from it?
Path: p
Words:0
4 summits
QUESTION 17
1. A photon is perspicuous on a metal that has a is-sue character of 6.80 eV. If the craveest waveprotraction of imponderous is emitted, what mold of imponderous is
this?
A. infrared
B. ultraviolet
C. visible
D. radio
4 summits
QUESTION 18
1.
If a circumference has a completion opposition of 24
A. 80.0 V
and 2.5 x 1023 e enjoins glide departed a final summit in 2.0 minutes, what is the applied voltage?
B. 12.0
V
C. 9.00 V
D. 8010 V
4 summits
QUESTION 19
1. An aim is 25 cm from a attenuated lens with a focal protraction of 15 cm. Where is the copy restraintmed?
A. 10
cm
B. 39 cm
C. 20 cm
D. 37.5 cm
4 summits
QUESTION 20
1.
A shine of imponderous traveling in zeal is perspicuous on a limpid ductile at an disposition of stroke of 26 o. What is the disposition of reconcern if the protest of refection of the
embodied is 1.41?
A. 26o
B. 18o
C. 12o
D. 51o
4 summits
QUESTION 21
1. If an essential-quality controlce of 2000 W is exerted by a round spring what conciliate be its mediocre agency output at a removal of 12 m from it?
A. 3.1
W/m2
B. 4.1 W/m2
C. 1.1 W/m2
D. 2.1 W/m2
4 summits
QUESTION 22
1.
The heap of a proton is 1.6726 × 10-27 kg and the heap of a neutron is 1.6749 × 10-27 kg. A proton takes a neutron restraintming a deuterium center. One would
expect the heap of this center to be:
A. any of these; it depends on the essential-quality released during the take.
B. equal
to (1.6726 1.6749) × 10-27 kg.
C. less than (1.6726 1.6749) × 10-27 kg.
D. senior than (1.6726 1.6749) × 10-27 kg.
4 summits
QUESTION 23
1.
In the plea propound, the quantum calculates (n, l, ml, ms) restraint hydrogen are, respectively,
A. 1, 0, 0, 0.
B. 1,
0, 0, ±1/2.
C. 1, 1, 1, 1.
D. 1, 1, 1, ±1/2.
4 summits
QUESTION 24
1.
What is the photon essential-quality of sky sky sky blue imponderous has an essential-quality of 5.68×10 -19 J, what is its wavelength?
A. 550 nm
B. 350
nm
C. 450 nm
D. 200 nm
4 summits
QUESTION 25
1. An speck has 8 protons and 17 nucleons. If it undergoes beta – waning, what are the calculate of protons and neutrons, respectively, in the
daughter center?
A. 7, 16
B. 8, 17
C. 8, 18
D. 9, 17

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