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3 years ago

50POINTS PLEASE HELP SPACE QUESTION

2 answers:

7 0

The seasons in the Northern Hemisphere are the opposite of those in the Southern Hemisphere. Seasons occur because Earth is tilted on its axis relative to the orbital plane, the invisible, flat disc where most objects in the solar system orbit the sun.

leonid [27]3 years ago

4 0

Regardless of the time of year, the northern and southern hemispheres always experience opposite seasons. This is because during summer or winter, one part of the planet is more directly exposed to the rays of the Sun than the other, and this exposure alternates as the Earth revolves in its orbit.

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You and your dog are walking along a pond. Your dog looks into the still water and is startled to see its reflection. Which phen

attashe74 [19]

You just identified the image as a "reflection", so it's a pretty good bet that
the phenomenon involves reflection somehow.

Your dog can see his reflection in a mirror inside the house just as easily
as in the surface of the pond. My dogs do it all the time. The phenomenon
doesn't require water.

It's reflection of light waves.

3 0

3 years ago

Read 2 more answers

Air resistance allow objects to develop full acceleration due to gravity true or false

Aloiza [94]

False. because the object cannot freefall due to resistance, so it cannot develop full acceleration.

3 0

3 years ago

Shakina and Juliette set the car's initial velocity to zero and set the acceleration to +1.2 m/s2, then clicked "start." Answer

Katarina [22]

Let's start by differentiating the terms distance and displacement. They both refer to the length of paths. Distance only accounts for the total length regardless of the path taken. Displacement measures the linear path from the starting point to the end point. So, it does not necessarily follow the actual path. However, for this problem, assuming that the path is just in one direction, displacement and distance would just be equal. The equation would be:

Distance = Displacement = v₀t + 0.5at² = 0(10 s) + 0.5(+1.2 m/s²)(10 s)²
Distance = Displacement = 60 meters

6 0

3 years ago

Part 1 - Basic Equations

bearhunter [10]

Answer:

1. λ = 2 L, 2. v = 2L f₁ , 3. v = √ T /μ², 4. μ = 2,287 10⁻³ kg / m , 5. Δv / v = 0.058 , 6. Δμ / μ = 0.12 , 7. Δ μ = 0.3 10⁻³ kg / m ,

8. μ = (2.3 ±0.3) 10⁻³ kg / m

Explanation:

The speed of a wave is

v = λ f 1

Where f is the frequency and λ the wavelength

The speed is given by the physical quantities of the system with the expression

v = √ T /μ² 2

1) The fundamental frequency of a string is when at the ends we have nodes and a maximum in the center, therefore this is

L = λ / 2

λ = 2 L

2) For this we substitute in equation 1

v = 2L f₁

3) let's clear from equation 2

The speed of a wave is

v = λ f₁

Where f is the frequency and Lam the wavelength

The speed is given by the physical quantities of the system with the expression

v = √ T /μ² 2

4) linear density is

μ = T / (2 L f₁)²

μ = 5.08 / (2 0.812 29.02)²

μ = 2,287 10⁻³ kg / m

We maintain three significant length figures, so the result is reduced to

μ = 2.29 10⁻³ kg / m

5) the speed of the wave is

v = 2 L f₁

The fractional uncertainty is

Δv / v = ΔL / L + Δf₁ / F₁

Δv / v = 0.02 / 0.812 + 1 / 29.02

Δv / v = 0.024 + 0.034

Δv / v = 0.058

6) the equation for linear density is

μ = T / (2 L f₁)²

Δμ / μ = 2 ΔL / L + 2Δf₁ / f₁

The tension is an exact value therefore its uncertainty is zero ΔT = 0

Δμ / μ = 2 0.02 / 0.812 + 2 1 / 29.02

Δμ / μ = 0.12

7) absolute uncertainty

Δ μ = $e_{r}$ μ

Δ μ = 0.12 2.29 10⁻³ kg / m

Δ μ = 0.3 10⁻³ kg / m

μ = (2.3 ±0.3) 10⁻³ kg / m

8 0

3 years ago

Inertia keeps your vehicle moving until a force slows it down, like __________ ?

FinnZ [79.3K]

Both answers a and c

6 0

3 years ago

Read 2 more answers