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3 years ago

14

Taylor drives 5 miles in 10 minutes. She stops at a light for 2 minutes. She then travels another 10 miles in 8 minutes. What wa

s her average speed?

1 answer:

attashe74 [19]3 years ago

5 0

45 miles per hour is the answer to the probably.

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Pedro is planning to model how changes in weather affect evaporation from lakes for his first experiment he wants to test how hu

Valentin [98]

Answer:

C. volume of water and temperature

Explanation:

a p e x

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3 years ago

2 decaliters + 800 deciliters = __________ liters?

Stolb23 [73]

Answer is 100 liters

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3 years ago

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How much heat is needed to change the temperature of 3 grams of gold (c = 0.129 ) from 21°C to 363°C? The answer is expressed to

Temka [501]

Q= mcΔT

Where Q is heat or energy

M is mass, c is heat capacitance and t is temperature

You have to convert Celsius into kelvin in order to use this formula I believe

Celsius + 273 = Kelvin

21 + 273 = 294K

363 + 273 = 636K

Now...

Q= (0.003)(0.129)(636-294)

Q= 0.132 J if you are using kilograms, in terms of grams which seems more appropriate the answer would be 132J of energy.

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2 years ago

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a typical cmall flashlight contains two batteries each having na emf of 2.0 v connected in series with a bulb havin ga resistanc

Helen [10]

Answer:

P = 0.25 W

Explanation:

Given that,

The emf of the battry, E = 2 V

The resistance of a bulb, R = 16 ohms

We need to find the power delivered to the bulb. We know that, the formula for the power delivered is given by :

$P=\dfrac{V^2}{R}\\\\P=\dfrac{2^2}{16}\\\\=0.25\ W$

So, 0.25 W power is delivered to the bulb.

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3 years ago

A current of 12 A flows for 20 minutes into an electric cooker. How much charge has the cooker used?

cluponka [151]

Time= 20 minutes= 20*60=1200 s
Charge=current*time=12*1200=14400 C

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2 years ago