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3 years ago

3.

Physics

1 answer:

Katen [24]3 years ago

6 0

Answer:

The right hemisphere of the brain is responsible for some of the cognitive functions such as attention, processing of visual shapes and patterns, emotions, verbal ambiguity, and implied meanings

balance ig

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Fused quartz possesses an exceptionally low coefficient of linear expansion, 5.50 × 10 − 7 ( ∘ C ) − 1 . Suppose a bar of fused

EastWind [94]

To solve this problem it is necessary to apply the concepts related to thermal linear expansion. Mathematically this concept can be expressed under the Equation:

$\Delta L = L_0 \alpha \Delta T$

Where,

$L_0 =$ Initial Length

$\alpha =$ Thermal Expanssion constant

$\Delta T =$ Change in Lenght

Our values are given as

$L_0 = 2.99m$

$\alpha = 5.50*10^{-7} ( \∘C )^{-1}$

$\Delta T = T_2-T_1 = 213-20$

Replacing at our equation we have,

$\Delta L = L_0 \alpha \Delta T$

$\Delta L = (2.99) (5.5 x 10^{-7}) (213 - 20)$

$\Delta L = 0.317*10^{-3}m\approx 0.317mm$

Therefore the expantion of the bar is 0.317mm

7 0

4 years ago

A current of 3.2 Amps flows through a 7.0 Ω resistor in a circuit. Calculate the voltage.

anygoal [31]

Answer:voltage=22.4volts

Explanation:

current=3.2A

Resistance=7ohms

Voltage =current x resistance

Voltage=3.2 x 7

Voltage=22.4volts

8 0

3 years ago

A truck has a mass of 2,000 kg. The driving force created by the engine is 3,000 Newtons. Calculate the acceleration caused by t

Brrunno [24]

Answer:

1.5 m/s^2

Explanation:

Force = 3000 Newtons

Mass = 2000 kilograms

Force = Mass x Acceleration

This rearranged to:

Acceleration = Force / Mass

Acceleration = 3000 / 2000 = 1.5 m/s^2

8 0

3 years ago

A freight car with a mass of 10 metric tons is rolling at 108 km/h along a level track when it collides with another freight car

Rufina [12.5K]

Answer:

20 metric tons

Explanation:

Using the Principle of Conservation of Linear Momentum which states that the total momentum of a system is constant in any direction in which no external force acts.

momentum before collision= momentum after collision

mathematically expressed as

m1u1 + m2u2 = m1v1+m2v2 =0

where:

m1= mass of rolling freight car = 10 metric tons = 10Mg

1 ton = 1000kg= 1Mg

u1 =initial velocity of freight car = 108km/h,

m2 = mass of stationary freight car = ?, this the unknown we are finding

u2 = initial velocity of

m2 = 0, because it is at rest,

v1= final velocity of m1,

v2= final velocity of m2

since they move together in the same direction they share a common final velocity as such

v1=v2= 36km/h

substituting valves in expression give

m1u1 + m2u2 = m1v1 + m2v2= 0

10Mgx 108km/hr + m2 x 0 = 10Mg x 36km/h + m2x36km/h

1080( Mg x km/hr) + 0 = 360 (Mg x Km/h) + 36m2 (km/h)

1080 (Mgx km/hr) - 360(Mg x km/h) = 36m2 (km/h)

720(Mg x km/h) = 36m2 (km/h)

divide both side by 36 (km/h) gives

m2 = 20Mg =20 metric tons

3 0

4 years ago

If he leaves the ramp with a speed of 35.0 m/s and has a speed of 33.0 m/s at the top of his trajectory, determine his maximum h

nadezda [96]

Answer:

H = 6.93 m

Explanation:

given data

velocity v = 35 m/s

horizontal component Vx = 33 m/s

solution

we get here maximum height so first we get vertical component here that is express as

Vy = $\sqrt{v^2- Vx^2}$ .........................1

put here value

Vy = $\sqrt{35^2- 33^2}$

Vy = 11.66 m/s

and

now we get height

H = $\frac{Vy^2}{2g}$ .............................2

put here value

H = $\frac{11.66^2}{2\times 9.8}$

H = 6.93 m

7 0

3 years ago