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SOVA2 [1]
3 years ago
10

Where does the kinetic energy come fromwhen you roll down a hill?

Physics
1 answer:
Lapatulllka [165]3 years ago
8 0
From the change of GPE into KE. Conservation of energy tells us this.
You might be interested in
What are TWO benefits of scientific using a diagram to model the water cycle? [PLS HELP ASAP]~pick 2 letters~
LenKa [72]

Answer:

A.) it can show changes that occur in many different parts of earth at the same time

D.) it can be used to show how the parts of the cycle relate to one another

Explanation:

When a scientific diagram is used as a model, it explains the phenomena described in the research.

Scientific models describing water cycle help students understand that a group of parts which relate can combine to form a larger system. The different parts of a water cycle such as evaporation and condensation all work together to facilitate continuity of the water cycle. Additionally, the models highlights the individual processes contributed by the stages of water cycle showing changes and resulting processes.

Option B and C are incorrect because the model diagrams show much details including individual processes contributed by each of the parts leading to functioning of the whole water cycle process.

8 0
3 years ago
Honey bees can acquire a small net charge on the order of 1 pC as they fly through the air and interact with plants. Estimate th
murzikaleks [220]

Answer:

3.35\cdot 10^{-16}N

Explanation:

The force exerted on a charged particle due to a magnetic field is given by:

F=qvB sin \theta

where

q is the charge of the particle

v is the velocity of the particle

B is the magnetic field strength

\theta is the angle between the directions of B and v

In this problem we have:

q=1 pC=1\cdot 10^{-12} C is the charge of one honey bee

v=15 mi/h = 6.7 m/s is the velocity of the bee

B=5.0\cdot 10^{-5} T is the average strength of the Earth's magnetic field

\theta=90^{\circ}, because the bee flies east to west while the Earth's magnetic field is south to north

Substituting into the equation, we find:

F=(1\cdot 10^{-12}C)(6.7 m/s)(5.0\cdot 10^{-5} T)(sin 90^{\circ})=3.35\cdot 10^{-16}N

7 0
3 years ago
Factors that affect the force of gravity between objects include their distance apart and their
mr_godi [17]

Answer:

factors that affect the force of gravity between objects include their distance apart and their mass.

Explanation:

6 0
3 years ago
The outer surface of a skier’s clothes of emissivity 0.7000.700 is at a temperature of 5.505.50 °C. Find the rate of radiation i
Ludmilka [50]

Answer:

121.0 W

Explanation:

We use the equation for rate of heat transfer during radiation.

Q/t = σεA(T₂⁴ - T₁⁴)

Since temperature of surroundings = T₁ = -20.0°C = 273 +(-20) = 253 K, and temperature of skier's clothes = T₂ = 5.50°C = 273 + 5.50 = 278.5 K.

Surface area of skier , A = 1.60 m², emissivity of skier's clothes,  ε = 0.70 and σ =  5.67 × 10⁻⁸ W/m²K⁴ .

Therefore, the rate of heat transfer by radiation Q/t is

Q/t = σεA(T₂⁴ - T₁⁴) = (5.67 × 10⁻⁸ W/m²K⁴ ) × 0.70 × 1.60 m² × (278.5⁴ - 253⁴) = 6.3054 × (1918750544.0625) × 10⁻⁸ W = 1.2098 × 10² W = 120.98 W ≅ 121.0 W

7 0
3 years ago
Read 2 more answers
Which of the following equals the change in velocity divided by the time?
Usimov [2.4K]

Answer:

speed

Explanation:

5 0
3 years ago
Read 2 more answers
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