Topic
Q:
Tukarkan \( 18 \mathrm{~km} / \mathrm{min} \) per minit kepada \( \mathrm{m} / \mathrm{s} \) per
saat.
Convert \( 18 \mathrm{~km} / \mathrm{min} \) per minute to \( \mathrm{m} / \mathrm{s} \) per second.
\( \begin{array}{ll}\text { A } 0.2 & \text { C } 2 \\ \text { B } 0.5 & \text { D) } 5\end{array} \)
Q:
07. A bomb explodes under water at a depth of 352 m . If sound wave completes 110 cy
till it reaches the surface of water, what will be the length of one compression of
wave.
\( \begin{array}{ll}\text { (1) } 3.2 \mathrm{~m} & \text { (2) } 1.6 \mathrm{~m} \\ \text { (3) } 0.8 \mathrm{~m} & \text { (4) } 0.4 \mathrm{~m}\end{array} \)
Q:
Мощность постоянного тока (в ваттах) вычисляется по формуле \( P=I^{2} R \),
где \( I \) - сила тока (в амперах), \( R \) - сопротивление (в омах). Пользуясь
этой формулой, найдите сопротивление \( R \), если мощность составляет \( 245 \mathrm{Bт} \),
а сила тока равна 7 A . Ответ дайте в омах.
Q:
Мощность постоянного тока (в ваттах) вычисляется по формуле \( P=I^{2} R \),
где \( I \) - сила тока (в амперах), \( R \) сопротивление (в омах). Пользуясь
этой формулой, найдите сопротивление \( R \), если мощность составляет 150 Br ,
а сила тока равна 5 A . Ответ дайте в омах.
Q:
Select the statement(s) that accurately describe the energ,
transformation described below.
\( \square \) electrical energy to light energy
\( \square \) electrical energy to thermal energy
\( \square \) thermal energy to gravitational energy
\( \square \) light energy to electrical energy
\( \square \) electrical energy to potential energy
Q:
Review It!
Select the statement(s) that accurately describe kinetic energ,
\( \square \) energy that is in motion
\( \square \) skater at the top of the skate ramp
\( \square \) roller coaster going down a hill
\( \square \) energy that is stored
\( \square \) skier skiing down a ski slope
Q:
3.31 - A "esteira rolante horizontal" do terminal de um aero-
porto se move a \( 1,0 \mathrm{~m} / \mathrm{s} \) e tem \( 35,0 \mathrm{~m} \) de comprimento. Se uma
mulher pisa em uma das extremidades e caminha a \( 1,5 \mathrm{~m} / \mathrm{s} \mathrm{em} \)
relaçāo à plataforma móvel, de quanto tempo ela necessita para
chegar à extremidade oposta, se andar (a) na mesma direção em
que a plataforma se move? (b) Na direção oposta?
Q:
A ball is dropped from a height of 2 metres and bounces \( 80 \% \) of its previous
height on each bounce.
(1) When it hits the ground for the \( 8^{\text {th }} \) time, what distance has it travelled?
(2) How high off the floor is the ball after the \( 8^{\text {th }} \) bounce?
Q:
Example 1: Calculate the
gravitational force if the mass of
the sun is \( 1.99 \times 10^{\wedge} 30 \mathrm{~kg} \) and earth
is \( 5.97 \times 10^{\wedge} 24 \mathrm{~kg} \) separated by the
distance \( 1.5 \times 10^{\wedge} 11 \mathrm{~m} \) ?(Gravitational
constant \( \mathrm{G}=6.673 \times 10^{\wedge}-11 \mathrm{Nm} 2 / \)
Kg 2 ) \( \quad \) Edited 19:23
Q:
Example 1: Calculate the
gravitational force if the mass of
the sun is \( 1.99 \times 10^{\wedge} 30 \mathrm{~kg} \) and earth
is \( 5.97 \times 10^{\wedge} 24 \mathrm{~kg} \) separated by the
distance \( 1.5 \times 10^{\wedge} 11 \mathrm{~m} \) ?(Gravitational
constant \( \mathrm{G}=6.673 \times 10^{\wedge}-11 \mathrm{Nm} 2 / \)
Kg 2 ) \( \quad \) Edited 19:23
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