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Fantom [35]
2 years ago
8

Help me I don't know what I'm doing ​

Physics
2 answers:
monitta2 years ago
6 0

Answer:

C the metal handle because it is a good conductor

grigory [225]2 years ago
3 0

Answer:

D.

Explanation:

Although the metal handle will last longer, if heated up enough it could burn her hand.

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A ray of light travelled from water into the air an angle of incidence of 30°. Calculate;
Dima020 [189]

Answer:

speed = distance/time

just find the speed if it

3 0
2 years ago
Two positive charges ( 8.0 mC and 2.0 mC) are separated by 300 m. A third charge is placed at distance r from the 8.0 mC charge
WINSTONCH [101]

Answer:

r=200m

Explanation:

From the question we are told that:

Charges:

Q_1=8.0mC

Q_2=2.0mC

Q_3=8.mC

Distance d=300m

Generally the equation for Force is mathematically given by

F=\frac{kq_1q_2}{r^2}

Therefore

F_{32}=F_{31}

\frac{q_2}{(300-r)^2}=\frac{q_1}{r^2}

\frac{2*10^{-3}}{(300-r)^2}=\frac{8*10^{-3}}{r^2}

r=2(300-r)

r=200m

8 0
2 years ago
A water rocket can reach a speed of 75 m/s in 0.050 seconds from launch. What is its average acceleration?
yanalaym [24]
A=v/t
So therefore 75/0.050= acceleration
So the answer is a= 1500 metres per second per second
6 0
2 years ago
Read 2 more answers
A lamp in a child's Halloween costume flashes based on an RC discharge of a capacitor through its resistance. The effective dura
Genrish500 [490]

Power of the lamp = (voltage) x (current)

0.62 watt = (3.0 v) x (current)

Current = (0.62 watt) / (3.0 volt)

Current = 0.207 Ampere

Charge = (current) x (time)

Charge = (0.207 Amp) x (0.32 sec)

<em>a).  Charge = 0.066 Coulomb</em>

Energy discharge through the lamp = (charge) x (voltage)

Energy = (0.66 C) x (3.0 volt)

Energy = 0.1984 Joule

Energy stored in a capacitor = (1/2) (Capacitance) (voltage²)

0.1984 Joule = (1/2) (Cap) (3.0 v)²

Cap = 2 x 0.1984 / 9

<em>b).  Cap = 0.044 Farad</em> (yikes !)

Resistance of the lamo = (voltage) / (current)

Resistance = (3.0 volt) / (0.207 Amp)

<em>c).  Resistance = 14.49 Ω</em>

All of this feels OK except for that ridiculous 44,000 μF, 3v capacitor.  Sadly, I have checked my work without finding an error, and I am too lazy to check it again.  So I'll call this my final answer, and leave it to some better Brainly person to find where I went wrong.

6 0
3 years ago
1. How far does a skydiver fall
GREYUIT [131]

Free fall without air resistance:

g=9.81 m/s²

t=235 s

h=?

h=0.5*g*t²

h=0.5*9.81*235²

h=270879m =270 km

5 0
3 years ago
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