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4 years ago

9

A table has several directional compasses, several lengths of wire, a battery, an ammeter, a light bulb, a battery holder and a

rubber eraser. A student is asked to create an electric motor. Looking at the materials provided, what other materials would they need?

2 answers:

liubo4ka [24]4 years ago

8 0

They would need a nail to wrap the wire around

Delvig [45]4 years ago

5 0

The right answer is C

permanent magnet.

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A rectangular squeeze film bearing will be used to absorb intermittent loads. The bearing is 500mm wide. The initial gap between

Anna71 [15]

Answer:

300 yeet

Explanation:

6 0

4 years ago

A car stands from rest and attains a speed of 20 m/s in 10 s. What distance will it cover ?

sashaice [31]

Answer:

100m

Explanation:

100m

s=ut+1/2at^2

s= unknown, u=0, a=2, t=10

s=0*10+1/2(2)(10)^2

s=1/2(2)(100)

s=1(100)

displacement = 100 meters

4 0

3 years ago

Three resistors are connected in parallel. If placed in a circuit with a 12-volt power supply. Determine the equivalent resistan

Ivan

(a) The equivalent resistance of three parallel resistors is (R₁R₂R₃)/(R₁R₂ + R₁R₃ + R₂R₃).

(b) The total circuit current is 12/R.eq.

(c) The voltage drop across and current in each resistor is IR₁, IR₂ and IR₃.

<h3>Equivalent resistance of three parallel resistors</h3>

The equivalent resistance of three parallel resistors is calculated as follows;

Let the first resistor = R₁
Let the second resistor = R₂
Let the third resistor = R₃

$\frac{1}{R_{eq}} = \frac{1}{R_1} + \frac{1}{R_2} + \frac{1}{R_2}\\\\R_{eq} = \frac{R_1R_2R_3}{R_1R_2 + R_2R_3 + R_1R_3}$

<h3>Total Circuit Current </h3>

The total circuit current is calculated as follows;

V = IR

$I= \frac{V}{R_{eq}} = \frac{12 \ V}{R_{eq}}$

<h3>Voltage drop in each resistor</h3>

Voltage drop in resistor 1 = IR₁

Voltage drop in resistor 2 = IR₂

Voltage drop in resistor 3 = IR₃

Learn more about parallel circuit here: brainly.com/question/80537

#SPJ1

3 0

2 years ago

Why does a tail appear when a comet nears the sun?

ahrayia [7]

It heats up. the ice transforms directly from a solid to a vapor, releasing dust particles. the solar wind sweeps the material and it forms what to appears to be a tail.

3 0

4 years ago

A hollow ball with a diameter of 3.81 cm has an average density of 0.0842 g/cm3. What force must be applied to hold it stationar

vfiekz [6]

Answer:

0.26

Explanation:

Given that :

Diameter of ball = 3.81 cm = 3.81/100 = 0.0381 m

Radius (r) = 0.0381 / 2 = 0.01905 m

Average density of ball (Db) = 0.0842 g/cm³ = (0.0842 / 1000)kg / 10^-6 = 0.0842/ 1000 * 10^6 = 84.2kg/m³

Density of water (Dw) = 1000kg/m³

Volume of hollow ball: (4/3) * pi * r³

V = (4/3) * π * 0.01905^3

V = 0.0000289583 m³

Required force = (Dw * V * g) - (Db * V * g)

= (1000 * 0.0000289583 * 9.8) - (84.2 * 0.0000289583 * 9.8)

= 0.259896109172

= 0.2598 N

6 0

3 years ago