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2 years ago

Denise is riding her bike and falls to the ground. During the collision, she hits both grass and cement.

Physics

1 answer:

irakobra [83]2 years ago

3 0

Answer:

Answer D: The grass extends the time of the collision.

Explanation:

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As the mass of an object increases, the weight of the object will ______?

Sergio039 [100]

Answer:

also increase

Explanation:

If the mass increases so will the weight.

4 0

2 years ago

during a car ride Sandra travel led directly east for 20 miles and then directly south for 15 miles what was her displacement. 2

damaskus [11]

25 miles at 42.5 degrees east of south. (20^2+15^2 =C^2...You get 25 miles...East of South because she traveled a longer distance to the East. Then you find the angle between the original and ending point.) Hope it helps. You may ask me any other questions.

8 0

2 years ago

If energy is going into a system, but not being converted into kinetic energy, it will be converted into potential energy. This

7nadin3 [17]

Answer:

1. Plateau where the temperature stays constant

2. Melting

3. Boiling points of the substance

Explanation:

The relationship between kinetic energy and temperature is given as follows;

$\overline E = \dfrac{3}{2} \times \dfrac{R}{N_A} \times T$

Where;

$\overline E$ = The average kinetic energy of the atom

R = The universal gas constant

$N_A$ = Avogadro's number

T = The temperature in Kelvin

Therefore, the kinetic energy increases as the temperature increases, however when the energy is not being converted into kinetic energy, the energy is stored as internal potential energy in the melted or evaporated state of the substance

Therefore, we have;

If energy is going into a system, but not being converted into kinetic energy, it will be converted into potential energy. This will be represented by a 1. plateau where the temperature stays constant on a heating curve, which occur at the 2. melting and 3. boiling points of the substance.

3 0

2 years ago

A small asteroid that has a mass of 100 kg is moving at 200 m/s when it is 1000 km above the Moon. 1) How fast will the meteorit

Georgia [21]

Answer:

v = 200.005 m / s

Explanation:

For this exercise we can use the concept of energy conservation,

Starting point. When the asteroid at h = 1000 km = 1 10⁶ m

Em₀ = K + U = ½ m v₀² - G m M / (R + h)

Final point. When the asteroid is on the surface of the moon

Emf = K + U = ½ m v² - G m M / R

As there is no friction the energy is conserved

Em₀ = Emf

½ m v₀² - G m M / (R + h) = ½ m v² - G m M / R

½ m (v₀² –v²) = G m M (-1 / R + 1 / R + h)

½ (v₀² - v²) = G M (-h / R (R + h))

v² = v₀² + 2 G M h / R (R + h))

Let's calculate

v² = 200² + 2 6.67 10⁻¹¹ 7.36 10²² / 1.74 (1.74 + 1 ))10¹²

v2 = 40000 + 2,059

v = 200.005 m / s

5 0

2 years ago

What are the activities involved in the scientific method

Hunter-Best [27]

Observe,plan,trial,repeat

8 0

2 years ago