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3 years ago

If an element is a semi-conductor, which classification correctly describes it?

Physics

1 answer:

stiks02 [169]3 years ago

8 0

Metal

Explanation:

semiconductors are materials which have a conductivity between conductors (generally metals)

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A student decides to give his bicycle a tune up. He flips it upside down (so there's no friction with the ground) and applies a

aleksklad [387]

Answer:

$V=9.2565m/s$

Explanation:

From the question we are told that:

Force $F = 34 N$

Time $t = 0.6 s$

Length of pedal $l_p=16.5cm \approx0.165m$

Radius of wheel $r = 33 cm = 0.33 m$

Moment of inertia, $I = 1200 kgcm2 = 0.12 kg.m2$

Generally the equation for Torque on pedal $\mu$ is mathematically given by

$\mu=F*L\\\mu=34*0.165$

$\mu=5.61N.m$

Generally the equation for angular acceleration $\alpha$ is mathematically given by

$\alpha=\frac{\mu}{l}$

$\alpha=\frac{5.61}{0.12}$

$\alpha=46.75$

Therefore Angular speed is \omega

$\omega=\alpha*t$

$\omega=(46.75)*(0.6)$

$\omega=28.05rad/s$

Generally the equation for Tangential velocity V is mathematically given by

$V=r\omega$

$V=(0.33)(28.05)$

$V=9.2565m/s$

5 0

3 years ago

The curved section of a horizontal highway is a circular unbanked arc of radius 740m. If the coefficient of static friction betw

fiasKO [112]

Coefficient of static friction = tan(a) = 0.4
r = 740 m
g = 9.8 m/s²
$v \: = \: \sqrt{gr \tan( \alpha ) }$
v = √(9.8 × 740 × 0.4) m/s
v ≈ 53.85908 m/s

6 0

4 years ago

Read 2 more answers

A high efficiency shower can save... 1. water 2. energy 3. both ?

pantera1 [17]

Answer:

both

Explanation:

You'll use less water....less hot water so water and energy are saved

4 0

2 years ago

A 5kg cart moving to the right with a velocity of 16 m/s collides with a concrete wall and

Kryger [21]

Explanation:

mass, m = 5kg

initial velocity, u = 16m/s

final velocuty, v = -22m/s

change in momentum, ∆p = ?

∆p = m (v-u)

5(-22-16)

5(38)

∆p = 190kgm/s

check the calculations!

8 0

3 years ago

Discussion on compound pendulum

slavikrds [6]

Explanation:

★A compound pendulum has an extended mass, like a swinging bar, and is free to oscillate about a horizontal axis. A special reversible compound pendulum called Kater’s pendulum is designed to measure the value of g, the acceleration of gravity.

Hope It Helps U

4 0

3 years ago