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2 years ago

Which of the following solid fuels has the highest heating value?

Physics

2 answers:

Hunter-Best [27]2 years ago

7 0

Hello There!

The correct answer is B.

Hope This Helps You!
Good Luck :)

Tatiana [17]2 years ago

3 0

Its bituminous coal good luck :;;;;;;)

You might be interested in

The wavelength of light is 5000 angstrom. Express it in nm and m.

Ierofanga [76]

Answer:

1 angstrom = 0.1nm

5000 angstrom = 5000/1 × 0.1nm

$1 \: angstrom = 1 \times {10}^{ - 10} m$

5000 angstrom = 5000 × 1 × 10^-10

Hope this helps you

7 0

2 years ago

Trace fossils are recognized as evidence of which pre-existing life? plants plants and animals neither plants nor animals animal

photoshop1234 [79]

Answer:

a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself.

Explanation:

Trace fossils are the indirect evidence of life in the past, such as the footprints, tracks, burrows, borings, and feces left behind by animals, rather than the preserved remains of the actual animal body itself.

Fossil is the naturally preserved remains of plants and animals which somehow get trapped in amber, hair, petrified wood, oil, coal, and DNA remnants.

5 0

2 years ago

Read 2 more answers

A 3.00-kg model airplane has velocity components of 5.00 m/s due east and 8.00 m/s due north. What is the plane’s kinetic energy

GalinKa [24]

Answer:

Kinetic energy, E = 133.38 Joules

Explanation:

It is given that,

Mass of the model airplane, m = 3 kg

Velocity component, v₁ = 5 m/s (due east)

Velocity component, v₂ = 8 m/s (due north)

Let v is the resultant of velocity. It is given by :

$v=\sqrt{v_1^2+v_2^2}$

$v=\sqrt{5^2+8^2}=9.43\ m/s$

Let E is the kinetic energy of the plane. It is given by :

$E=\dfrac{1}{2}mv^2$

$E=\dfrac{1}{2}\times 3\ kg\times (9.43\ m/s)^2$

E = 133.38 Joules

So, the kinetic energy of the plane is 133.38 Joules. Hence, this is the required solution.

5 0

1 year ago

Read 2 more answers

A torsional pendulum consists of a disk of mass 450 g and radius 3.5 cm, hanging from a wire. If the disk is given an initial an

Montano1993 [528]

To solve this problem we will use the kinematic equations of angular motion, starting from the definition of angular velocity in terms of frequency, to verify the angular displacement and its respective derivative, let's start:

$\omega = 2\pi f$

$\omega = 2\pi (2.5)$

$\omega = 5\pi rad/s$

The angular displacement is given as the form:

$\theta (t) = \theta_0 cos(\omega t)$

In the equlibrium we have to $t=0, \theta(t) = \theta_0$ and in the given position we have to

$\theta(t) = \theta_0 cos(5\pi t)$

Derived the expression we will have the equivalent to angular velocity

$\frac{d\theta}{dt} = 2.7rad/s$

Replacing,

$\theta_0(sin(5\pi t))5\pi = 2.7$

Finally

$\theta_0 = \frac{2.7}{5\pi}rad = 9.848\°$

Therefore the maximum angular displacement is 9.848°

6 0

2 years ago

A punted football is observed to have velocity components vhorizontal = 15 m/s to the right and vvertical = 1.25 m/s directed do

enot [183]

Answer:

v₀ₓ = 15 m / s, $v_{oy}$ = 5.2 m / s

v = 15.87 m / s , θ = 19.1

Explanation:

This is a projectile launch problem. The horizontal speed that is constant throughout the entire path is worth 15 m / s, instead the vertical speed changes in value due to the acceleration of gravity, let's look for the initial vertical speed

Vy² = $v_{oy}$ ² - 2 g y

$v_{oy}$ ² = $v_{y}$ ² + 2 g y

$v_{oy}$ = √ ( $v_{y}$ ² + 2 gy

Let's calculate

$v_{oy}$ = √ (1.25² + 2 9.8 1.3)

$v_{oy}$ = √ (27.04)

$v_{oy}$ = 5.2 m / s

The initial speed can be calculated by the initial speed

v = √ v₀ₓ² + $v_{oy}$ ²

v = RA (15² + 5.2²)

v = 15.87 m / s

We look for the angle with trigonometry

tan θ = voy / vox

θ = tan⁻¹ I'm going / vox

θ = tan⁻¹ 5.2 / 15

θ = 19.1

The answer is

v₀ₓ = 15 m / s

$v_{oy}$ = 5.2 m / s

5 0

1 year ago