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mixas84 [53]
3 years ago
15

Please help I'm taking a timed test!

Physics
2 answers:
SCORPION-xisa [38]3 years ago
8 0
B. A small rubber ball bouncing near a little girl
xenn [34]3 years ago
8 0

Answer:

B  ......a small rubber ball bouncing near a little girl

Explanation:

All the other answers  arent a type of energy change they aint moving sooo where is the energy  change ...... Nowhere .

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Which statements about inertia and centripetal force are correct? Check all that apply. Inertia is always present. Inertia cause
allsm [11]
Inertia IS always present. Inertia is NOT the force that causes objects to continue moving in circles, that is centripetal force. Centripetal force is NOT always present. Centripetal force DOES pull objects toward the center of a circle. <span> Inertia and centripetal force DOES cause circular motion. Thank you and eat sand fren ;)</span>
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3 years ago
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This is a term use to describe an ecological community in which moisture and temperature are high
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It is described as having a marshy surface where mosses, lichens, berries and low shrubs grow with mucky soil and permafrost underneath. This is a term use to describe an ecological community in which moisture and temperature are high. This is a northern hemisphere habitat with wet soil.

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3 years ago
It is interesting to speculate on the properties of a universe with different values for the fundamental constants.
qwelly [4]

Answer:

Part a)

\lambda = 0.345 m

Part b)

\Delta x = 0.274 m

Part c)

r = 2.8 \times 10^{11} m

Explanation:

Part a)

De broglie wavelength is given as

\lambda = \frac{h}{mv}

\lambda = \frac{1}{(0.145)(20)}

\lambda = 0.345 m

Part b)

By principle of uncertainty we know that

\Delta x \times \Delta P = \frac{h}{4\pi}

\Delta x \times (0.145)(21 - 19) = \frac{1}{4\pi}

\Delta x = 0.274 m

Part c)

As we know that

\frac{kq_1q_2}{r^2} = \frac{mv^2}{r}

also we know

mvr = \frac{nh}{2\pi}

v = \frac{h}{2\pi mr}

now we have

\frac{ke^2}{r} = \frac{mh^2}{4\pi^2m^2 r^2}

r = \frac{h^2}{4\pi^2mke^2}

r = 2.8 \times 10^{11} m

5 0
3 years ago
It takes Serina 4.44 hours to drive to school. Her route is 15 km long. What is Serina’s average speed on her drive to school?
Svet_ta [14]

Answer: 3.38 km per hour

Explanation:

3 0
3 years ago
How long will it take by 50W heater to melt 100g of ice at 0degreeC? Specific heat capacity of water = 4.2J/ (g0C), latent heat
vaieri [72.5K]

Answer:

420 s

Explanation:

3 0
3 years ago
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