1)one planet makes rotation around the sun every 628 days ,find the angular velocity of this planet ?
A. $10 rad/day$
B. $1 rad/day$
C. $1.10^{-1} rad/day$
D. $1.10^{-2} rad/day$
2) we add 8380 j of heat to 2kg of water at temperature of 30 C,find the temperature of water after this add?
A. 31 ºC
B. 36 ºC
C. 40 ºC
D. 41 ºC
3)A charge of 2 C moves with the velocity of 10 m/s in a magnetic field of 0.2 T ,the angle $\theta$ between velocity vector an magnetic field vector is $\theta=\pi/2$ .
find the value of magnetic force ?
A. 1 N
B. 2 N
C. 3 N
D. 4 N
4) A metal wire of lenght of 2 m and section area 10 $mm^{2}$ ,and resistivity equal$10^{-7}A.m$,connected to a battrey with potential of 5 V.
find the value of the current in the wire?
A. 100 A
B. 250 A
C. 300 A
D. 450 A
Answer key :
1.D
2.A
3.D
4.B
Monday 12 September 2011
Friday 9 September 2011
MCAT Physics Practice test 5 & Answer key
1) we have a ball with mass m=1Kg ,and one force acts on this ball and reduces its velocity from 4m/s to 2m/s in time 1s ,what is the value of this force?
A. - 1N
B.- 2N
C. 1N
D. 3N
2) A force acts on abject with mass m =3Kg ,then gives it an acceleration of $1 m/s^{2}$,find the value of acceleration for same force if the mass of object is 2Kg ?
A. $1 m/s^{2}$
B. $1.5 m/s^{2}$
C. $3 m/s^{2}$
D. $6 m/s^{2}$
3)we have a volume of gas $ V=10m^ 3$ at pressure 100 KPa and temperature 10 C,find new volume of this gas if we change the pressure to 200 KPa and temperature to 50 C?
A. $20 m^ 3$
B. $21 m^ 3$
C. $25 m^ 3$
D. $30 m^ 3$
4)How much heat is required to raise temperature of 500 mL of water from 50 C to 100 C ?
A. 10 Kcal
B. 20 Kcal
C. 25 Kcal
D. 50 Kcal
5) A object moves along the X axis according to the law :
$ x= t^{3}+3t^{2}+2$
find acceleration at t=3s ?
A. $6 m/s^{2}$
B.$12 m/s^{2}$
C.$18 m/s^{2}$
D.$24 m/s^{2}$
6) A object moves along the X axis according to the law :
$ x= 5t^{2}+2t+7$
find velocity at time t= 10 s ?
A.102 m/s
B.120 m/s
C.170 m/s
D.190 m/s
7)A charge of 10 C and mass $m=10^{-27}kg$ moves with velocity v=5 m/s in a magnetic field of 0.5 T
the angle between velocity vector and magnetic field vector is $\pi/2$ .
find the radius of the circle of the charged particle's orbit?
A.$10^{-26}m$
B.$10^{-27}m$
C.$2.10^{-27}m$
D.$5.10^{-26}m$
Answer key :
1.B
2.B
3.C
4.C
5.D
6.A
7.B
A. - 1N
B.- 2N
C. 1N
D. 3N
2) A force acts on abject with mass m =3Kg ,then gives it an acceleration of $1 m/s^{2}$,find the value of acceleration for same force if the mass of object is 2Kg ?
A. $1 m/s^{2}$
B. $1.5 m/s^{2}$
C. $3 m/s^{2}$
D. $6 m/s^{2}$
3)we have a volume of gas $ V=10m^ 3$ at pressure 100 KPa and temperature 10 C,find new volume of this gas if we change the pressure to 200 KPa and temperature to 50 C?
A. $20 m^ 3$
B. $21 m^ 3$
C. $25 m^ 3$
D. $30 m^ 3$
4)How much heat is required to raise temperature of 500 mL of water from 50 C to 100 C ?
A. 10 Kcal
B. 20 Kcal
C. 25 Kcal
D. 50 Kcal
5) A object moves along the X axis according to the law :
$ x= t^{3}+3t^{2}+2$
find acceleration at t=3s ?
A. $6 m/s^{2}$
B.$12 m/s^{2}$
C.$18 m/s^{2}$
D.$24 m/s^{2}$
6) A object moves along the X axis according to the law :
$ x= 5t^{2}+2t+7$
find velocity at time t= 10 s ?
A.102 m/s
B.120 m/s
C.170 m/s
D.190 m/s
7)A charge of 10 C and mass $m=10^{-27}kg$ moves with velocity v=5 m/s in a magnetic field of 0.5 T
the angle between velocity vector and magnetic field vector is $\pi/2$ .
find the radius of the circle of the charged particle's orbit?
A.$10^{-26}m$
B.$10^{-27}m$
C.$2.10^{-27}m$
D.$5.10^{-26}m$
Answer key :
1.B
2.B
3.C
4.C
5.D
6.A
7.B
Wednesday 7 September 2011
PCAT Physics Practice test 2 & answer key
1)witch one is Balmer series ?
A.$1/\lambda=R(1/1^{2}-1/2^{2})$
B.$1/\lambda=R(1/2^{2}-1/2^{2})$
C.$1/\lambda=R(1/3^{2}-1/2^{2})$
D.$1/\lambda=R(1/4^{2}-1/2^{2})$
2)we have one wave with wavelength $\lambda= 6000 A$ ,find the frequency of this wave?
A.$10^{13}$
B.$5.10^{14}$
C.$5.10^{15}$
D.$6.10^{15}$
3) what is the value of energy for free particule?
A. E<-10 e.v
B . E=-10 e.v
C. E=-13.6 e.v
D. E>= 0 e.v
A.$1/\lambda=R(1/1^{2}-1/2^{2})$
B.$1/\lambda=R(1/2^{2}-1/2^{2})$
C.$1/\lambda=R(1/3^{2}-1/2^{2})$
D.$1/\lambda=R(1/4^{2}-1/2^{2})$
2)we have one wave with wavelength $\lambda= 6000 A$ ,find the frequency of this wave?
A.$10^{13}$
B.$5.10^{14}$
C.$5.10^{15}$
D.$6.10^{15}$
3) what is the value of energy for free particule?
A. E<-10 e.v
B . E=-10 e.v
C. E=-13.6 e.v
D. E>= 0 e.v
Tuesday 6 September 2011
MCAT Physics Practice test 4 & Answer key
1)The period of a wave is $2500.10^{-6} s $ ,what is the frequencey of this wave ?
A. 400 Hz
B. 600 Hz
C. 1200 Hz
D. 2500 Hz
2) A car has a speed 10 m/s ,start to slow at acceleration of $1 m/s^{2}$ ,witch distance can move before stopping?
A.10 m
B.25 m
C.50 m
D.75 m
3) a man makes a lap around 400 m track in time 50 s.what is his average speed?
A.2 m/s
B.4 m/s
C.8 m/s
D.12 m/s
4) A metal bar is 100 cm long at 20 C ,we heated this bar at 40 C ,what is the increase in length if the linear exponsion coefficient of this metal is $2.10^{-5 }C^{-1}$.
A. $10^{-5 }$
B. $2.10^{-5 }$
C. $10^{-4}$
D. $4.10^{-4 }$
5) A car starts with speed null at constant acceleration $4m/s^{2}$ ,find the speed of the car at the end of 10 s?
A. 5 m/s
B.10 m/s
C.15.25 m/s
D.40 m/s
6) the speed of light in glass is $2.10^{8} $ what is the refractive index of glass?
A.n=1.5
B.n=2
C.n=3
D.n=4
Ansewr key :
1.A
2.C
3.C
4.C
5.D
6.A
A. 400 Hz
B. 600 Hz
C. 1200 Hz
D. 2500 Hz
2) A car has a speed 10 m/s ,start to slow at acceleration of $1 m/s^{2}$ ,witch distance can move before stopping?
A.10 m
B.25 m
C.50 m
D.75 m
3) a man makes a lap around 400 m track in time 50 s.what is his average speed?
A.2 m/s
B.4 m/s
C.8 m/s
D.12 m/s
4) A metal bar is 100 cm long at 20 C ,we heated this bar at 40 C ,what is the increase in length if the linear exponsion coefficient of this metal is $2.10^{-5 }C^{-1}$.
A. $10^{-5 }$
B. $2.10^{-5 }$
C. $10^{-4}$
D. $4.10^{-4 }$
5) A car starts with speed null at constant acceleration $4m/s^{2}$ ,find the speed of the car at the end of 10 s?
A. 5 m/s
B.10 m/s
C.15.25 m/s
D.40 m/s
6) the speed of light in glass is $2.10^{8} $ what is the refractive index of glass?
A.n=1.5
B.n=2
C.n=3
D.n=4
Ansewr key :
1.A
2.C
3.C
4.C
5.D
6.A
Thursday 1 September 2011
MCAT Physics Practice test 3 & answer key
1)if the quntum number $\ell$=4 how many $m_{\ell}$ exist ?
A.3
B.4
C.7
D.9
2)which particule has mass but not charge ?
A. electron
B. photon
C. proton
D. neutron
3)the magnetic field of very long,straight wire is ?
A.$ B=2\mu_{0}i/\pi r$
B.$ B=\mu_{0}i/4\pi r$
C.$ B=\mu_{0}i/2\pi r$
D.$ B=\mu_{0}i/\pi r$
4)one ball has a density of 0.55 $g/cm^{3}$ ,what fraction of the ball floats below the water?
A. 15%
B. 45%
C. 50%
D. 55%
5) A object with mass 20 kg travel at speed 1 km/s ,find kinetic energy?
A. 10 j
B. 20 j
C. 10 kj
D. 20 kj
6)what is the weight of mass m=100 g
A.0.1 N
B. 1 N
C. 2 N
D. 10 N
Answer Key
1.D
2.D
3.B
4.D
5.D
6.B
A.3
B.4
C.7
D.9
2)which particule has mass but not charge ?
A. electron
B. photon
C. proton
D. neutron
3)the magnetic field of very long,straight wire is ?
A.$ B=2\mu_{0}i/\pi r$
B.$ B=\mu_{0}i/4\pi r$
C.$ B=\mu_{0}i/2\pi r$
D.$ B=\mu_{0}i/\pi r$
4)one ball has a density of 0.55 $g/cm^{3}$ ,what fraction of the ball floats below the water?
A. 15%
B. 45%
C. 50%
D. 55%
5) A object with mass 20 kg travel at speed 1 km/s ,find kinetic energy?
A. 10 j
B. 20 j
C. 10 kj
D. 20 kj
6)what is the weight of mass m=100 g
A.0.1 N
B. 1 N
C. 2 N
D. 10 N
Answer Key
1.D
2.D
3.B
4.D
5.D
6.B
SAT Physics Practice Questions 1 & answer key
SAT Practice questions
1)if the focal distance of a lens is 2m. then the lens is :
A. -1/2 diopter converging lens
B. 1/2 diopter converging lens
C. -1/2 diopter diverging lens
D. 1/2 diopter diverging lens
2)what is the energy stored in a 1μF capacitor charged at 2kV
A. 5 j
B. 3.2 j
C. 4 j
D. 6 j
3) 1 Kcal of heat furnished to a system .and this system deos 4 kj of work.what is the value of $\Delta{U}$?
A.184 j
B.1kj
C.1.184kj
D. 4kj
4) the electric field of very long straight wire is?
A.$ E=\lambda /4\pi \epsilon_{0}d$
B.$ E=\lambda/2\pi\epsilon_{0}d$
C.$E=\lambda/\pi\epsilon_{0}d$
D.$E=2\lambda/\pi\epsilon_{0}d$
Answer key
1.B
2.C
3.A
4.B
1)if the focal distance of a lens is 2m. then the lens is :
A. -1/2 diopter converging lens
B. 1/2 diopter converging lens
C. -1/2 diopter diverging lens
D. 1/2 diopter diverging lens
2)what is the energy stored in a 1
A. 5 j
B. 3.2 j
C. 4 j
D. 6 j
3) 1 Kcal of heat furnished to a system .and this system deos 4 kj of work.what is the value of $\Delta{U}$?
A.184 j
B.1kj
C.1.184kj
D. 4kj
4) the electric field of very long straight wire is?
A.$ E=\lambda /4\pi \epsilon_{0}d$
B.$ E=\lambda/2\pi\epsilon_{0}d$
C.$E=\lambda/\pi\epsilon_{0}d$
D.$E=2\lambda/\pi\epsilon_{0}d$
Answer key
1.B
2.C
3.A
4.B
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