3 years ago

Is this right? Please help me

Physics

1 answer:

vekshin13 years ago

4 0

Answer:

variable

Explanation:

meaning diffent

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The answer is C

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5000 j of heat are added to a system. it does 3500 j of work on the surroundings. what is δe in j?

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<span>The Answer is 5200 Joules</span>

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The Earth orbiting the Sun is an example of circular motion. What is the name of the force involved?

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4 years ago

A beam of protons moves in a circle of radius 0.20 m. The protons move perpendicular to a 0.36-T magnetic field. (a) What is the

gregori [183]

Answer:

a) $v=6.898\times 10^{6}\ m.s^{-1}$ is the speed of each proton

b) $F_c=3.97\times 10^{-13}\ N$

Explanation:

Given:

radius of path of motion, $r=0.2\ m$

we know charge on protons, $q=1.6\times 10^{-19}\ C$

magnetic field strength, $B=0.36\ T$

we've mass of proton, $m=1.67\times 10^{-27}\ kg$

From the equivalence of magnetic force and the centripetal force on the proton:

$F_B=F_C$

$q.v.B=\frac{m.v^2}{r}$

$q.B=\frac{m.v}{r}$

where:

v = speed of the proton

$(1.6\times 10^{-19})\times 0.36=\frac{1.67\times 10^{-27}\times v}{0.2}$

$v=6.898\times 10^{6}\ m.s^{-1}$ is the speed of each proton

Now the centripetal force on each proton:

$F_c=m.\frac{v^2}{r}$

$F_c=1.67\times 10^{-27}\times \frac{(6.898\times 10^6)^2}{0.2}$

$F_c=3.97\times 10^{-13}\ N$

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4 years ago

While buying a hot plate you notice the resistance of the hot plate is 25.0 . when connected to a 120. v source, how much curren

klemol [59]

The basic relationship between voltage, resistance and current of an electrical device is given by Ohm's law:
$V=IR$
where
V is the voltage
I is the current
R is the resistance

The hot plate in our problem is connected to a source of V=120 V and it has a resistance of $R=25.0 \Omega$ , therefore we can rearrange the previous equation to calculate the current through the device:
$I= \frac{V}{R}= \frac{120 V}{25.0 \Omega}=4.8 A$

4 0

4 years ago

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