9000039301
Level:
B
Given formula for an acceleration of the motion in the form
\[
a = \frac{v - v_{0}}
{t} ,
\]
find the initial velocity \(v_{0}\).
\(v_{0} = v - at\)
\(v_{0} = vat\)
\(v_{0} = v + at\)
\(v_{0} = at - v\)
B
9000046402
Level:
B
Consider the rectangle \(ABCD\)
with length and height \(|AB| = 6\, \mathrm{cm}\)
and \(|BC| = 2\sqrt{3}\, \mathrm{cm}\). Let
\(S\) be the intersection of
diagonals. Find the angle \(\measuredangle ASB\).
\(120^{\circ }\)
\(60^{\circ }\)
\(90^{\circ }\)
9000039302
Level:
B
Find \(N\),
the number of the turns, as a function of the other variables in the formula for the
magnetic induction of a solenoid.
\[
B =\mu \frac{NI}
{l}
\]
\(N = \frac{Bl}
{\mu I} \)
\(N = \frac{Bl\mu }
{I} \)
\(N = B -\mu \frac{I}
{l} \)
\(N = \frac{Bl}
{\mu } - I\)
9000045706
Level:
B
Given a regular pentagon with the side
\(a\), find the
radius \(r\) of
the circle circumscribed to this pentagon.
\(r = \frac{a}
{2\cdot \cos 54^{\circ }}\)
\(r = \frac{2a}
{\cos 72^{\circ }}\)
\(r = \frac{2a}
{\cos 54^{\circ }}\)
\(r = \frac{a}
{2\cdot \cos 72^{\circ }}\)
9000039303
Level:
B
Find the time \(t\)
as a function of the other variables in the formula for the distance of a motion in the
form \(s = v_{0}t + s_{0}\).
\(t = \frac{s-s_{0}}
{v_{0}} \)
\(t = \frac{s}
{t+s_{0}} \)
\(t = \frac{s+s_{0}}
{v_{0}} \)
\(t = \frac{v_{0}}
{s-s_{0}} \)
9000045707
Level:
B
Given a regular pentagon with the side
\(a\), find the
radius \(\rho \) of
the circle inscribed to this pentagon.
\(\rho = \frac{a}
{2} \cdot \mathop{\mathrm{tg}}\nolimits 54^{\circ }\)
\(\rho = \frac{2a}
{\mathop{\mathrm{tg}}\nolimits 54^{\circ }}\)
\(\rho = \frac{a}
{2\cdot \mathop{\mathrm{tg}}\nolimits 54^{\circ }}\)
\(\rho = 2a\cdot \mathop{\mathrm{tg}}\nolimits 54^{\circ }\)
9000039304
Level:
B
Find the focus length \(f\)
as a function of the other variables from the following equation relating this distance with object
and image distances \(a\)
and \(a'\).
\[
\frac{1}
{f} = \frac{1}
{a} + \frac{1}
{a'}
\]
\(f = \frac{aa'}
{a+a'}\)
\(f = \frac{a-a'}
{a+a'}\)
\(f = a + a'\)
\(f = \frac{a}
{a'}\)
9000045708
Level:
B
Given a regular hexagon with the side
\(a\), find the
radius \(\rho \) of
the circle inscribed to this hexagon.
\(\rho = \frac{a}
{2\cdot \mathop{\mathrm{tg}}\nolimits 30^{\circ }}\)
\(\rho = 2a\cdot \mathop{\mathrm{tg}}\nolimits 30^{\circ }\)
\(\rho = \frac{2a}
{\mathop{\mathrm{tg}}\nolimits 30^{\circ }}\)
\(\rho = 2a\cdot \mathop{\mathrm{tg}}\nolimits 60^{\circ }\)
9000038910
Level:
B
Consider the function \(f\colon y =\mathop{\mathrm{cotg}}\nolimits x\).
In the following list identify the function which has the same graph as the graph of the
function \(f\).
\(k\colon y = -\mathop{\mathrm{tg}}\nolimits \left (x + \frac{\pi } {2}\right )\)
\(g\colon y = -\mathop{\mathrm{tg}}\nolimits x\)
\(b\colon y =\mathop{\mathrm{tg}}\nolimits \left (x + \frac{\pi } {2}\right )\)
\(h\colon y =\mathop{\mathrm{tg}}\nolimits \left (x - \frac{\pi } {2}\right )\)
\(m\colon y = -\mathop{\mathrm{tg}}\nolimits x - \frac{\pi } {2}\)
9000039305
Level:
B
Find \(m_{1}\)
as a function of the other variables from the following mixing equation.
\[
w_{1}m_{1} + w_{2}m_{2} = w_{3}m_{3}
\]
\(m_{1} = \frac{w_{3}m_{3}-w_{2}m_{2}}
{w_{1}} \)
\(m_{1} = \frac{w_{3}m_{3}w_{2}m_{2}}
{w_{1}} \)
\(m_{1} = \frac{w_{3}m_{3}+w_{2}m_{2}}
{w_{1}} \)
\(m_{1} = \frac{w_{2}m_{2}-w_{3}m_{3}}
{w_{1}} \)