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Makovka662 [10]
3 years ago
15

What method of thermal energy is at work when heat lamps are used to warm up baby chickens?

Physics
2 answers:
garik1379 [7]3 years ago
7 0

From the list of choices you provided, the answer is A-radiation.

ioda3 years ago
5 0

what are the rest of the choises

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An object has 600J of kinetic energy from its motion and a speed of 10m/s. What is it's mass?
Gemiola [76]

Answer:

The mass is 12 kg

Explanation:

KE = \frac{1}{2} mv²

Substitute:

600 = \frac{1}{2} m(10)²

600 = \frac{1}{2} m 100

600 = 50m

m = \frac{600}{50}

m = 12

4 0
3 years ago
A scientific theory is_____.
natta225 [31]

Answer:

B. A well-tested explanation for a widely accepted hypothesis

Explanation:

This is true about a scientific theory going by the fact of it being a well tested explanation. For example, in one of the Newtons law of motion which he stated to be<em> "To every action, there is equal and opposite reaction", </em><em>the hypothesis has been known till he was able to offer a well tested explanations with calculations showing that, it was actually true.</em>

6 0
3 years ago
A 73.9 kg weight-watcher wishes to climb a
Tresset [83]

The height to which the weight-watcher must climb to work off the equivalent 991 (food) Calories is 0.59 Km

<h3>How to determine the energy. </h3>

1 food calorie = 103 calories

Therefore,

991 food calories = 991 × 103

991 food calories = 102073 calories

Multiply by 4.2 to express in joule (J)

991 food calories = 102073 × 4.2

991 food calories = 428706.6 J

<h3>How to determine the height </h3>
  • Energy (E) = 428706.6 J
  • Mass (m) = 73.9 kg
  • Acceleration due to gravity (g) = 9.8 m/s²
  • Height (h) =?

E = mgh

Divide both side by mg

h = E / mg

h = 428706.6 / (73.9 × 9.8)

h = 591.95 m

Divide by 1000 to express in km

h = 591.95 / 1000

h = 0.59 Km

Learn more about energy:

brainly.com/question/10703928

7 0
2 years ago
An orange might roll off your cafeteria tray when you stop suddenly because of
Rina8888 [55]
Inertia: <span>The </span>law<span> of </span>inertia says <span>that an object at rest stays at rest and an object in motion stays in motion unless a force does something.</span>
8 0
3 years ago
Is density independent of sample size?
erik [133]

Answer:

➢ Length, Width, Height, Volume, Mass. ➢ A size independent property is a physical property that does not change when the size of an object changes.

Examples:

➢ Examples of size independent properties: ➢ Density, Color, State of Matter.

Hope this helps :)

5 0
4 years ago
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