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4 years ago

A negatively charged rubber rod can pick up small, neutrally charged pieces of paper by a process called

Physics

1 answer:

Ronch [10]4 years ago

4 0

The answer would be intoduction hope this really helped

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An acceleration in the direction of motion increases speed,and an acceleration opposite to the durection of motion decreases spe

Luden [163]

That's 'centripetal acceleration'. It points toward the center of the circle in which the object is traveling, even if it's only a temporary piece of a circle.

8 0

4 years ago

You measure the power delivered by a battery to be 5.83 W when it is connected in series with two equal resistors. How much powe

BabaBlast [244]

Answer:

P = 23.32 W

Explanation:

In series

equivalent Resistance

R(eq)=R+R=2R

In parallel equivalent resistance

R(eq) = R*R/(R+R) =R/2

since.

power

P=V² / R

in series

⇒V = √(P*R)

=√(5.83*2R )

=√(11.66R)

in parallel

P = V² / R(eq)

=(√(11.66R)²) / (R/2)

P=11.66 * R * 2/R

P = 23.32 W

6 0

3 years ago

A type of cuckoo clock keeps time by having a mass bouncing on a spring, usually something cute like a cherub in a chair. What f

Reil [10]

Answer:0.906 N/m

Explanation:

Given

time period $T=0.66 s$

mass $m=0.01 kg$

System can be considered as spring mass system

Time Period of spring mass system is given by

$T=2\pi \sqrt{\frac{m}{k}}$

squaring

$k=\frac{4\pi ^2m}{T^2}$

$k=\frac{4\times \pi ^2\times 0.01}{0.66^2}$

$k=0.906 N/m$

4 0

4 years ago

A barrier erected to prevent you from falling to lower levels is known as a:

Ganezh [65]

Lower levels of what?

8 0

4 years ago

Wire A and wire B are made from the same material and are under the same tension, but waves travel along string B at one-third t

Ahat [919]

Answer:

0.3 mm

Explanation:

$\rho$ = Density of material

$\mu$ = Linear density of the material = $\rho A$

Area = Area = $\pi r^2$

r = Radius

The velocity of a wave is given by

$v=\sqrt{\dfrac{T}{\mu}}\\\Rightarrow v=\sqrt{\dfrac{T}{\rho A}}\\\Rightarrow v=\sqrt{\dfrac{T}{\rho \pi r^2}}$

It can be seen that the velocity is inversly proportional to the radius

$v\propto \sqrt{\dfrac{1}{r^2}}\\\Rightarrow v\propto \dfrac{1}{r}$

So,

$\dfrac{v_a}{v_b}=\dfrac{r_b}{r_a}$

From the question

$v_b=\dfrac{1}{3}v_a$

$\\\Rightarrow \dfrac{v_a}{\dfrac{1}{3}v_a}=\dfrac{r_b}{0.1}\\\Rightarrow 3=\dfrac{r_b}{0.1}\\\Rightarrow r_b=3\times 0.1\\\Rightarrow r_b=0.3\ mm$

The radius of wire B is 0.3 mm

4 0

4 years ago