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Gold sand county high and grade three and the first-time monthly test in the first high school
The physics tries
(Total divide 120 cent, time 90 minutes)
1.If show, the small thing piece P which is located on smooth and fixed inclined plane is rightwards subjected to a level to push the function of dint F.Have already known a thing piece P to fall along with the inclined plane acceleration.Keep a F direction constant now, make it let up, then acceleration ( )
A.Must diminish
B.Must become big
C.Must constantly
D.May diminish, may become big, may also constantly
2.A bunch of reply color light is shotted into glass by the air, the occurrence refracts but is divided into a, the b two bunches of monochrome light, its dissemination direction is shown as diagram.Establish glass to the a, the b refractive index is na and nb, a respectively, the b distinguishes for va and vb in the dissemination speed within glass, then
( )
A.na>nb B.navb D.va
3.For the metered air, the process probably taken place BE ( )
A.Wait Duo compression, the temperature lower B.Wait Wen Xi Re4, the physical volume is constant
C.Let out calories, inside can increase D.Cut off hot compression, inside ability constant
4.Drew 4 ability of the hydrogen atom class in the diagram, and note
The energy E correspond.Be placed in n=4 ability classes of a
Cluster hydrogen atom to mentally retarded jump to move, can send out if
The stem grows different frequency not wave.Have already known the Yi of metals potassium
Achievement is 2.22 eVs.In these light waves, can from
The surface of metals potassium tees off all amount of photoelectron to have()
A.2 kind B.3 kind
C.4 kind D.5 kind
5.Have already known that the gravitation often measures C, the moon center arrives the period T that distance R and the moon of the Earth center round the Earth movement.Only make use of these three pieces according to, can estimate the physical quantity of to have ( )
A.The quality of the moon B.Permafrost quality
C.Permafrost radius D.The moon rounds the size that the Earth circulates speed
6.A quality is a m person station in the elevator, elevator acceleration ascension, acceleration size is, g is gravity acceleration.The person's pressure to the elevator bottom is ( )
A. B.2mg C.mg D.
20.The Cape been placed in rectangle coil within evenly strong magnetic field abcd, settled by Heng
The speed rounds an ab side to turn to move, the magnetic field direction runs parallel with paper noodles to combine and ab
Perpendicular.In the t=0 times, coil flat surface and paper noodles be heavy to match(like diagram),
The cd side of coil leaves paper to face to outside sport.If rule from the a →b →c
→D →respond of a direction electric current for positive, then can reflect to respond in the coil
Electric current I at any time the diagram line of the t variety BE ( )

8.An in diagram, the b is two point electric charges, their electricities quantity is a Q1, Q2 respectively, the MN is an ab on-line of medium perpendicular line, P is medium 1:00 on the perpendicular line.Following which the medium circumstance can make one P point field the strong direction point to MN left side
A.Q1, all of Q2s are positive charges, and the Q be 1| Qs 2|s
The C.Q1 is a negative charge, the Q2 is a positive charge, and|Q 1||Q 2|
9.Experiment
(1)Use the cursor as 50 cents, the card Chinese foot(the measured value be accurate to arrive a 0.02 mms) of degree measurese some cylinder of diameter, on the card Chinese foot of show number like diagram.Can read that a diameter of cylinder is a mm.
(2)Make use of figure 1 show of the electric circuit measure electric current form mA of inside Zu RA.R1 in diagram, the R2 is an electric resistance, K1, K2 in order to give or get an electric shock key, the B is a power supply.(inside the Zu can neglect)
The â‘  is according to the figure an electric circuit principle which gives diagram,
In the figure 2 of real object diagram top on-line
The ② has already known R 1=140 Ωs and R 2= is 60 Ωs.When electricity the key K1 shuts to match, when the K2 breaks to open, the electric current form reads to count to 6.4 mAs;When K1, when the K2 all shuts to match, the electric current form reads to count to 8.5 mAs.Can beg a RA from here= Ω .(Reserve 2s effectively numerical)
10.(16 cent)the AB be quarter of the arc orbits that the Shu keeps inside flat surface, carry B and level to keep orbit to mutually slice in the bottom and is shown as diagram.One small ball's starting to order from the AN is started follow orbit by the quiet to fall.Have already known that an orbit radius is a R, the quality of small ball is a m, don't account to everywhere rub.Beg
(1)The small ball exercise kinetic energy for B to order;
(2)The small ball falls height of be apart from the level orbit is size and direction of speed;
(3)Small ball through arc orbit of when the B order to order with the C of level orbit, the orbit support dint NB be subjected to, NC's ising each is much big
11.(20 cent)the existence space in the vacuum the scope be enough big, the level rightwards evenly strong electric field.In the electric field, if take the small ball of positive electricity for the m a quality is release by the quiet, speed and Shu of small ball keep a direction to clip the Cape as 37 °s in sport(take
).Now will should small ball's being a certain be keep with early speed Shu to throw upward from the electric field.Beg
Exercise process in
(1)Size and direction of electric field dint that the small ball be subjected to;
(2)Small ball from throw to order to the electricity of apogee certainly can change quantity;
(3)The size and direction of the minimum momentum of small ball.
12.(19 cents)
The quality holds still in the edge of level table's top of leave high h in the ground for the M small thing piece A, the quality follows table's top toward A sport with the speed v for the m small thing piece B 0 with it the occurrence is touch.(collision time be very short)The A leaves table's top after touch and it falls to the ground to order the level distance of leave the point of departure as L.The B is anti- after touch to exercise.Beg the distance of B countermarch.Have already know B and the friction factor of the move of table's top is.The gravity acceleration is a g.