3 years ago

If Steve races on the highway going south for 2430 meters in 40 seconds what is his velocity?

Physics

1 answer:

mezya [45]3 years ago

3 0

Answer: 60.75 m/s

Explanation:

2430 m / 40s = 60.75 m/s

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What is a circuit,s resistance if 12v produces 2A of current ?

Arlecino [84]

We have to find the resistance.
V = 12
A = 2
R = ?
And then we divide it to find r.
12/2 = 6 ohm's.

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3 years ago

Assume that the surface temperature of the lightbulb filament when it is plugged into an outlet of 120 V is about 3000 K and the

myrzilka [38]

Answer:

A= $8.7\times 10^{-7}m^{2}$

Explanation:

We have given power =40 W but only 10% of this power is used so actual power $P=\frac{40\times 10}{100}=4 W$

We know that from Stefan's law $p=\sigma AT^4$ where $\sigma$ is Boltzmann constant which value is $5.6\times 10^{-8}Wm^{-2}K^{-4}$

So $4=5.67\times 10^{-8}\times A\times 3000^4$

A= $8.7\times 10^{-7}m^{2}$

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3 years ago

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Four wires are made of the same highly resistive material, cut to the same length, and connected in series. Wire 1 has resistanc

Paraphin [41]

Answer:

$V_2 = \frac{R_2 V_0}{R_1+R_2+R_3+R_4}$

Explanation:

The 4 wires are connected in series: this means that the same current flow through them, and the voltage of the battery, V0, is equal to the sum of the voltages on each individual resistor:

$V_0=V_1+V_2+V_3+V_4$

Also, the equivalent resistance of the series circuit is

$R_{eq}=R_1+R_2+R_3+R_4$

The voltage V2 across wire 2 is given by Ohm's law:

$V_2 = R_2 I$ (1)

where I is the total current in the circuit, which is given by:

$I=\frac{V_0}{R_{eq}}=\frac{V_0}{R_1+R_2+R_3+R_4}$

Substituting this into eq. (1), we find an expression for V2:

$V_2 = \frac{R_2 V_0}{R_1+R_2+R_3+R_4}$

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3 years ago

All fungi are

sertanlavr [38]

Answer:

multicellular

Explanation:

all fungi are multicellular

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When a carousel is in motion, the movement of the carousel horse can BEST be described as

lara [203]

Kinetic energy because the horse is in motion

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4 years ago