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3 years ago

I need help with physics please help me!

Physics

1 answer:

olga nikolaevna [1]3 years ago

3 0

The answer is d) protons were created as the results of the charging process

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A new mechanic foolishly connects an ammeter with 0.1 Ω resistance directly across a 12-V car battery with internal resistance o

NemiM [27]

Answer:

The power dissipated by the meter is 1188W

Explanation:

Here we have a circuit constituted with a power source and two resistors in series, we can calculate the power dissipated by the meter using the following formula:

$P=I^2R_m$

We first need to fin the current going through the circuit:

$I=\frac{V}{R}\\where:\\V=voltage\\R=resistance$

$R=R_s+R_m$

because they are connected in series. So:

$I=\frac{12V}{(0.01+0.1)}=109A$

$P=(109)^2*0.1=1188W$

8 0

3 years ago

An uncharged capacitor and a resistor are connected in series with a switch and a 12 V battery. At the instant the switch is clo

balu736 [363]

Answer:

V = 12 V

Explanation:

Since a capacitor can't change the voltage between its plates instantaneously, this means that just after the switch is closed, the voltage through the capacitor is zero.
So, the current that flows in this moment is the same that would flow in a series circuit with only one resistor connected to the battery.
Applying KVL to the circuit (neglecting the presence of the capacitor which can be replaced by a short circuit just after closing the switch), the voltage through the resistor must be equal to the one of the battery, i.e., 12 V.

5 0

3 years ago

Match the term with each description:

Alex_Xolod [135]

Answer:

An acid is a compound that increases hydrogen ions (H+) when it is dissolved in a solution.

all I got

4 0

3 years ago

If a hockey player starts from rest and accelerates at a rate of 2.1 m/s2 how long does it take him to skate 30m

OLga [1]

Hello!

<span>Let us apply the time function of space, in the uniform uniform motion (UUM)
</span>
Formula: $S = S_{o} + V_{o}* t + a* \frac{t^2}{2}$

Data:
S (Final position) = 30 m
So (Initial Position) = 0 m
Vo (Initial velocity) = 0 m/s
t (time) = ? (in seconds)
a (acceleration) = 2.1 m/s²

Solving:
$S = S_{o} + V_{o}* t + a* \frac{t^2}{2}$
$30 = 0 + 0*t + 2.1* \frac{t^2}{2}$
$30 = \frac{2.1t^2}{2}$
$30*2 = 2.1t^2$
$60 = 2.1t^2$
$2.1t^2 = 60$
$t^2 = \frac{60}{2.1}$
$t^2 \approx 28.5$
$t \approx \sqrt{28.5}$
$\boxed{\boxed{t \approx 5.3\:s}}\end{array}}\qquad\quad\checkmark$

Answer:
<span>C. 5.3s</span>

5 0

4 years ago

What is the energy source that drives plate tectonics

melisa1 [442]

Answer: Earth’s internal heat

Explanation:

The energy source for plate tectonics is Earth's internal heat while the forces moving the plates are the ridge push and slab pull gravity forces.

7 0

4 years ago