In a closed system, _____ energy is equal to potential energy plus kinetic energy.

9. Seismic waves are

Brilliant_brown [7]

d. both a and b

Explanation:

Seismic waves are both transverse and compressional or longitudinal waves.

A seismic wave is an elastic wave that causes a sudden disturbance in earth materials.

Seismic waves are both longitudinal and transverse waves.
There are two main types of seismic waves which are the surface and body waves.
The surface waves runs on the earth surface. These are the rayleigh and love waves.
The surface waves causes damages on the earth surface as they are both longitudinal and transverse.
Body waves moves within the earth surface. They are p-waves and s-waves.
P-waves are longitudinal or compressional waves that propagates within the earth surface.
S-waves are transverse waves that moves perpendicularly to their direction of propagation.

Learn more:

Seismograph brainly.com/question/11292835

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6 0

3 years ago

In Houston, Earth's B→ field has a magnitude of 5.2 × 10−5 Tand points in a direction 57∘ below a horizontal line pointing north

Anastasy [175]

Answer:

F = 0.0034 N

Explanation:

Given:

$B = 5.2*10^(-5) T\\Q = 57 degrees\\I_{wire} = 12 A\\L_{wire} = 10 m$

The angle between B and wire = 90 - 57 = 33 degrees

Using formula:

$F = B*I*L*sin (90-Q)\\F = (5.2*10^(-5)*(12)*(10)*sin (33)\\F = 0.0034 N$

6 0

3 years ago

If the density of the fuel is 0.821 g/ml, what mass of fuel has the airplane taken on?

bija089 [108]

<em>Mass of fuel has the airplane took on = 167.89 kg</em>

$\boxed{\boxed{\bold{Further~explanation}}}$

Density is a quantity derived from the mass and volume

density is the ratio of mass per unit volume

With the same mass, the volume of objects that have a high density will be smaller than objects with a smaller type of mass

The unit of density can be expressed in g / cm3 or kg / m3

Density formula:

$\large{\boxed{\bold{\rho~=~\frac{m}{V} }}}$

ρ = density

m = mass

v = volume

A common example is the water density of 1 gr / cm3

If we look at fuel capacity data such as Airbus which has a maximum capacity of 204, 5 liters then the mass of fuel it carries is

ρ = 0.821 gr / ml = 0.821 kg / l

mass = ρ . V

mass = 0.821 kg / l . 204.5 liters

mass = 167.89 kg

So the mass of fuel carried by aircraft is 167.89 kg

$\boxed{\boxed{\bold{Learn~more}}}$

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Keywords: density, mass, volume, aircraft, fuel, derivative quantities

7 0

3 years ago

Read 2 more answers

A girl walked 200 m from her home to her friend’s home, then she walked 1 km to a shop. She then walked 800 m back to her home.

timama [110]

Answer:

200 meters+1000 meters+800 meters=2000 meters or 2km

Explanation:

1km=1000m

3 0

3 years ago

The normal is a line perpendicular to the reflecting surface at the point of incidence.

ladessa [460]

Answer:

True

Explanation:

The normal line is defined as the line which is perpendicular to the reflecting surface at the point where the incident ray meet with the reflecting surface.

The angle of incident is defined as the angle which is subtended by the incident ray with respect to the normal ray by consider the normal ray as the base line and angle is measured from the point where incident ray is incident on the reflecting surface of the mirror.

Similarly reflecting ray can be defined as the ray which is reflected after the incident of a ray and the angle subtended by the reflecting ray is measure with respect to normal ray by considering normal ray as a base line.

Therefore, the normal ray is the perpendicular line to the reflecting surface at the point of incidence.

4 0

3 years ago