this is a voice recording of the text of a book that you listen rather than read.​

Answer:

An energy source in which we use to power most powerplants and reactors.

Explanation:

Answer:

its digital technology

Answer:

Average Power = 14599.24 W

Explanation:

We know that :

[tex]power = \frac{work \: done}{time} [/tex]

[tex]work \: done \: = force \times displacement \: \cos( \alpha ) [/tex]

Acceleration of car (a) = v - u / t

= 13. 8 - 0 / 13.5

= 1.02 m / sec ^2

Displacement (s) = v^2 / 2a

= 13.8 * 13.8 / 2.04

= 93.35 m

Now,

Resultant force = F (Car) - F (Resistance) = m * a

Force (Car) = m * a + Force (Resistance)

Force (Car) = 1744.2 + 367.1 = 2111.3 N

Work done by Car = Force (Car) * Displacement

= 2111.3 * 93.35 * Cos 0°

= 197089.85 J

Average Power = Work Done / time

= 197089.85 J / 13.5 sec

= 14599.24 W

Answer:

Harriet Tubman

Explanation:

Answer:

Harriet Tubman

Explanation:

She was an abolitionist and fought for women's rights.

Harriet was also the first woman to lead a combat assault.

Answer:

Gravity creates stars and planets by pulling together the material from which they are made.

Explanation: Thats the only thing i have im stuck on the tga quiz

Answer:

The magnitude of the final velocity is approximately 0.526 m/s in approximately the direction of 8.746° East of South

Explanation:

The given collision parameters are;

The kind of collision experienced by the four velcro-lined air-hockey disk = Inelastic collision

The mass of the first disk, m₁ = 50.0 g

The velocity of the first disk, v₁ = 0.80 m/s West = -0.8·i

The mass of the second disk, m₂ = 60.0 g

The velocity of the second disk, v₂ = 2.50 m/s North = 2.5·j

The mass of the third disk, m₃ = 100.0 g

The velocity of the third disk, v₃ = 0.20 m/s East = 0.20·i

The mass of the fourth disk, m₄ = 40.0 g

The velocity of the fourth disk, v₄ = 0.50 m/s South = -0.50·j

Therefore, the total initial momentum of the four velcro-lined air-hockey disk, [tex]\Sigma P_{initial}[/tex] is given as follows;

[tex]\Sigma P_{initial}[/tex] = m₁·v₁ + m₂·v₂ + m₃·v₃ + m₄·v₄ = 50.0×(-0.80·i) + 60.0×(2.50·j) + 100 × (0.20·i) + 40.0 × (-0.50·j)

∴ [tex]\Sigma P_{initial}[/tex] = -40·i + 150·j + 20·i - 20·j = -20·i + 130·j

∴ [tex]\Sigma P_{initial}[/tex] = -20·i + 130·j

By the law of conservation of linear momentum, we have;

[tex]\Sigma P_{initial} = \Sigma P _{final}[/tex] = -20·i + 130·j

Therefore, given that the collision is perfectly inelastic, the disks move as one after the collision and the four masses are added to form one mass, "m", m = m₁ + m₂ + m₃ + m₄ = 50.0 + 60.0 + 100.0 + 40.0 = 250.0

∴ m = 250.0 g

Let, "v" represent the final velocity of the four disks moving as one after the collision

We have;

[tex]\Sigma P _{final}[/tex] = m × v = 250.0 × v = -20·i + 130·j

∴ v = -20·i/250 + 130·j/250 = -0.08·i + 0.52·j

The final velocity of the four disks after collision, v = -0.08·i + 0.52·j

The magnitude of the final velocity, [tex]\left | v \right |[/tex] = √((-0.08)² + (0.52)²) ≈ 0.526

[tex]\left | v \right |[/tex] ≈ 0.526 m/s

The direction of the final velocity, θ = arctan(0.52/(-0.08)) ≈ -81.254°

The direction of the final velocity, θ ≈ -81.254° which is 8.746° East of South

Answer:

[tex]\mathrm{(a)\:}32,000,000\:\mathrm{Ns},\\\mathrm{(b)\:}390,000\:\mathrm{N}[/tex]

Explanation:

The impulse-momentum theorem states the impulse on an object is equal to the change in momentum of that object. Momentum is given by [tex]p=mv[/tex]. Since mass is constant, the train's change in momentum is:

[tex]\Delta p=m\Delta v=750,000\cdot42=31,500,000=\fbox{$32,000,000\:\mathrm{Ns}$}[/tex](two significant figures).

Impulse is also given as [tex]\Delta p = F\Delta t[/tex], where [tex]F[/tex] is the average force applied and [tex]\Delta t[/tex] is change in time. Since [tex]t[/tex] is given as [tex]80\mathrm{s}[/tex], we have the following equation:

[tex]F\Delta t=\Delta p\\\\F=\frac{\Delta p}{\Delta t},\\\\F=\frac{31,500,000}{80},\\\\F=393,750=\fbox{$390,000\:\mathrm{N}$}[/tex](two significant figures).

Answer:

Your tracker will detect your arm movement and will interpret it as steps so this is what it likely happening. Something similar happens while driving, if you go through a bumpy road or your car has a stiff suspension then this can cause the tracker to detect movement and count it as steps. Usually while driving and if you notice some vibration on your car or steering wheel you can try having your tracker a little bit more tight around your wrist and this will help decrease the amount of steps detected.

Explanation:

(Via AlvaroFitbit)

Given :

A cell of e.m.f  1.5 V and internal resistance 2.5 ohm is connected in series with an ammeter of resistance 0.5 ohm.

To Find :

The current in the circuit.

Solution :

We know, resistance of the ammeter is in series with the circuit.

So, total resistance is :

R = 2.5 + 0.5 ohm

R = 3 ohm

Also, e.m.f applied is 1.5 V .

Now, by ohm's law :

[tex]I = \dfrac{V}{R}\\\\I = \dfrac{1.5}{3}\\\\I = 0.5 \ A[/tex]

Therefore, the current in the circuit is 0.5 A.

The average speed of the skier as shown in the image  is 2.33 m/s.

Average speed is the ratio of the total distance covered to the total time taken  ot cover the distance.

To calculate the average speed of the skier, we use the formula below.

Formula:

Where:

From the question,

Given:

Suibstitute these values into equation 1

Hence, the average speed of the skier is 2.33 m/s.

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a.

b.

c.

e.

f.

g.

character limit thing

Answer:

Use IGG Games or get money.

Explanation:

Answer:

Go to Undertale.com and buy it

Explanation:

sorry i don't really know how to answer this

Answer:

Good:

Quarrying creates jobs in areas where there are limited opportunities.

There is a huge demand for the products of quarrying, such as building stone and cement. ...

Quarrying provides income to local councils through taxation.

Good communications are needed for transporting the products of quarrying.

Bad: Quarrying creates pollution from noise and dust.

Heavy traffic causes pollution and congestion on narrow country roads. ...

Quarries create visual pollution and tourists may be deterred by the scars on the landscape.

Explanation:

Answer:

fdhjyegshdrhjfsdffddfnfdhdfkjdfkjkjdfijldfjkdfndfkjhdfbhjfdjdfhhjdfhj

Explanation:

Answer:

There are two answers:

When player 1 collided with player 2, player 1's kinetic energy transferred to player 2.

Player 1 could slow down, stop , change direction, or fall, while player 2 would begin moving away from the collision point and possibly fall.

Explanation:

Polar substances are likely to dissolve in polar solvents.

Your answer is B.

Answer:

The answer is A good luck :P

Answer:

A

Explanation:

The light Bounces off because it is reflecting off glass or anything else

Answer:

5.65 m/s²

Explanation:

We'll begin by calculating the mass of PJ when in San Diego (i.e Earth). This can be obtained as follow:

Weight of PJ on Earth (Wₑ) = 545 N

Acceleration due to gravity (g) on Earth (gₑ) = 10 m/s²

Mass of PJ on Earth (mₑ) =.?

Wₑ = mₑ × gₑ

545 = mₑ × 10

Divide both side by 10

mₑ = 545 / 10

mₑ = 54.5 Kg

Thus, the mass of PJ on San Diego (i.e Earth) is 54.5 Kg

Finally, we shall determine the acceleration due to gravity of planet Koja. This can be obtained as follow:

Weight of PJ on Koja (Wₖ) = 308 N

Mass of PJ on Koja (mₖ) = mass of PJ on Earth (mₑ) because mass is constant irrespective of location.

Mass of PJ on Earth (mₑ) = 54.5 Kg

Mass of PJ on Koja (mₖ) = 54.5 Kg

Acceleration due to gravity of on Koja (gₖ) =?

Wₖ = mₖ × gₖ

308 = 54.5 × gₖ

Divide both side by 54.5

gₖ = 308 / 54.5

gₖ = 5.65 m/s²

Thus, the acceleration due to gravity on planet Koja is 5.65 m/s²

Answer: B. Mechanical Waves

Explanation:

Solar energy source contributes least to global warming. Hence option C is correct.

Renewable energy is a energy from a source that is not exhausted or depleted when used. Solar energy or wind energy are examples of the renewable energy source. as wind and solar power is abundantly present everywhere in the environment, it can not be exhausted after its over use.

Non-renewable energy comes from sources that will be exhausted or will not be replenished after its use. Fossil fuels: coal, petroleum, and natural gas are the examples of the non renewable energy sources . Coal is the main element in fossil fuels.

Solar energy is abundantly available in the entire solar system. It is renewable energy source, it has no bad effect on the environment and global warming.

Hence option C is correct.

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Answer:

600 J

Explanation:

it's obviously btw so yeahhhh

Answer:

692.4m/s

Explanation:

According to Newton's second law;

F = ma

F = m(v-u)/t

m is the mass

v is the final velocity

u is the initial velocity

t is the time

F is the forcr

Given

F = 450N

m = 2800kg

u =690m/s

t =15s

v = ?

Substitute into the formula

450 = 2800(v-690)/15

450×15 = 2800(v-690)

6750 = 2800(v-690)

6750/2800 =v-690

2.4 = v-690

v = 690+2.4

v = 692.4m/s

Hence the final velocity is 692.4m/s

Answer:

A 20 Hz sound wave is 75 m long in the water (1500/20 = 75) whereas a 20 Hz sound wave in air is only 17 m long (340/20 = 17) in air. As we descend below the surface of the sea, the speed of sound decreases with decreasing temperature.

Answer:

Okay

Explanation:

First we should quickly remind ourselves of the equation for density:density= mass/ volumeTo calculate the density we need a method of measuring the mass of each object and another method for measuring the volume of each object. To measure the mass in both cases we can simply use a measuring balance. To measure the volume we will need to use 2 separate methods. For the cube we can simply measure the length, height and depth with a ruler, multiply our measurements and we obtain the volume. The statue is a little more tricky because it has an irregular shape so we can't use the ruler anymore. Instead we should use graduated tank/trough of water. First of all measure the amount of water in the tank before putting in the statue. Then submerge the statue in the water and take another measurement of the volume of water in the tank. The statue will displace the water in the tank giving a higher value. We finally subtract the initial volume from the final volume and we should obtain the volume of the statue.We now have all the measurements necessary to calculate the density of both objects!

Answer:

6m

Explanation:

2+4=6

Answer:

When the  water is frozen it turns to ice and the density decreases.

Explanation:

Have A Wonderful Day !!

Answer:

ExplaHeat can travel from one place to another in three ways: Conduction, Convection and Radiation. ... Thermal energy is transferred from hot places to cold places by convection. Convection occurs when warmer areas of a liquid or gas rise to cooler areas in the liquid or gas.nation:

Answer:

Initial x component of velocity: 30m/s

Initial y component of velocity: 0m/s

Explanation:

First, draw a diagram of a cliff and the object falling off the cliff as well as the initial velocity listed and the object at the bottom of the cliff with time. The object is fired horizontally, thus the initial velocity in this case 30m/s equals the horizontal initial velocity, there is no initial vertical velocity.

If the object hits the ground in 2 seconds since horizontal velocity is not affected by any other forces it will move at constant speed horizontally. However, vertically there is a gravitational force acting on the projectile converted from the potential energy of it's height. we know the gravitational constant g=-9.8m/s^2, and we can use the kinematic equation Δy=v0(t)+1/2at^2 to find the Δy(change in height of the projectile), as v0y=0, Δy=1/2at^2, a=9.8m/s^2 and t=2 seconds

thus Δy=19.6m≈20m

hope this helped

The initial X component of velocity when the projectile initially fired is 30m/s. The initial Y component of velocity when the projectile initially fired is 0m/s.

There are three equation of motions that can be used when motion of the object is under constant acceleration and on a straight path.

The vertically there is a gravitational force acting on the projectile converted from the potential energy of it's height.

The gravitational constant g =-9.8m/s^2,

we can use the equation of motion

Δy = v0(t) + 1/2at^2

The initial horizontal velocity of the projectile, Vₓ = 30 m/s

The time of the motion of the projectile, t = 2 s

The horizontal distance traveled by the projectile is given by the range of the projection as;

X = Vₓt

X = 30 x 2

X = 60 m

Thus the horizontal distance traveled by the projectile is 60 m

Hence, The initial X component of velocity when the projectile initially fired is 30m/s. The initial Y component of velocity when the projectile initially fired is 0m/s.

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Given :

An inclined plane is used to lift a box into a moving truck. The ramp is 6 m long and 1.5 m.

To Find :

The mechanical advantage of the inclined plane.

Solution :

Mechanical advantage, M.A of an inclined plane is given by :

[tex]M.A = \dfrac{\text{Length of slope}}{\text{Height of plane}}[/tex]

Putting given values in above equation, we get :

[tex]M.A = \dfrac{6 \ m}{1.5 \ m}\\\\M.A = 4[/tex]

Therefore, the mechanical advantage of the inclined plane is 4.