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3 years ago

What type of simple machine is found in a wheelbarrow? Lever Wedge

Physics

2 answers:

Semenov [28]3 years ago

8 0

Answer: Lever

A wheelbarrow consists of a lever to be able to lift the material, and a wheel to be able to move it horizontally. So in a sense, a wheelbarrow is a complex machine consisting of two simple machines.

s2008m [1.1K]3 years ago

5 0

It would be lever, wheelbarrows function like one, however they do not act like a wedge, the three machines it is made of is lever wheel and axel

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In 1985, Said Aouita set the world record for the 1500m race in a time of 3 minute 29.46 second ? What was his average speed ?

Vitek1552 [10]

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3 years ago

A 600W toaster, 1200W iron and a 100W bulb are all connected to household 120V circuit. a) find the current drawn by each applia

Advocard [28]

Answer:

(a) %a, 10 A, 0.833 A

(b) 12 ohm

Explanation:

Power of toaster, P1 = 600 W

Power of iron, P2 = 1200 W

Power of bulb, P3 = 100 W

V = 120 V

As they are in household circuit, so they are connected in parallel, so the voltage is same for all.

(a) Use the formula P = V x i

Current in toaster, i1 = P1 / V = 600 / 120 = 5 A

Current in iron, i2 = P2 / V = 1200 / 120 = 10 A

Current in bulb, i3 = P3 / V = 100 / 120 = 0.833 A

(b) Resistance of heating element of iron is R2.

V = i2 x R2

120 = 10 x R2

R2 = 12 ohm

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Cost of 1 KWh = $0.1

Cost of 228 KWh = 0.1 x 228 = $22.8

8 0

3 years ago

Read 2 more answers

A horizontal spring is attached to a wall at one end and a mass at the other. The mass rests on a frictionless surface. You pull

Kaylis [27]

Answer:

Δt'/ T% = 90.3%

Explanation:

Simple harmonic movement is described by the expression

x = A cos (wt)

we find the time for the two points of motion

x = - 0.3 A

-0.3 A = A cos (w t₁)

w t₁ = cos -1 (-0.3)

remember that angles are in radians

w t₁ = 1.875 rad

x = 0.3 A

0.3 A = A cos w t₂

w t₂ = cos -1 (0.3)

w t₂ = 1,266 rad

Now let's calculate the time of a complete period

x= -A

w t₃ = cos⁻¹ (-1)

w t₃ = π rad

this angle for the forward movement and the same time for the return movement in the oscillation to the same point, which is the definition of period

T = 2 t₃

T = 2π / w s

now we can calculate the fraction of time in the given time interval

Δt / T = (t₁ -t₂) / T

Δt / T = (1,875 - 1,266) / 2pi

Δt / T = 0.0969

This is the fraction for when the mass is from 0 to 0.3, for regions of oscillation of greater amplitude the fraction is

Δt'/ T = 1 - 0.0969

Δt '/ T = 0.903

Δt'/ T% = 90.3%

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4 years ago

List four functions of the skeletal system.

Free_Kalibri [48]

The major functions of the bones are body support, facilitation of movement, protection of internal organs, storage of minerals and fat, and hematopoiesis.

7 0

3 years ago

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Two electrons travel towards each other at 0.2 c parallel to the laboratory x-axis. What is the relative velocity of one electro

Leya [2.2K]

1) In the reference frame of one electron: 0.38c

To find the relative velocity of one electron with respect to the other, we must use the following formula:

$u'=\frac{u-v}{1-\frac{uv}{c^2}}$

where

u is the velocity of one electron

v is the velocity of the second electron

c is the speed of light

In this problem:

u = 0.2c

v = -0.2c (since the second electron is moving towards the first one, so in the opposite direction)

Substituting, we find:

$u'=\frac{0.2c+0.2c}{1+\frac{(0.2c)(0.2c)}{c^2}}=\frac{0.4c}{1+0.04}=0.38c$

2) In the reference frame of the laboratory: -0.2c and +0.2c

In this case, there is no calculation to be done. In fact, we are already given the speed of the two electrons; we are also told that they travel in opposite direction, so their velocities are

+0.2c

-0.2c

5 0

3 years ago