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3 years ago

How many joules are required to heat .250 kg of liquid water from 0 °C to 100 °C ?

Physics

1 answer:

dedylja [7]3 years ago

4 0

Answer:

Specific heat of water is 4.186 J/g/C. The heat required to raise the temperature by

Here is mass of water being heated, specific heat of water and change in temperature.

Here .

Heat energy required is

Explanation:

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What is the power generated by a 3.7 V cell phone battery that provides 2.0 A of current?

expeople1 [14]

Answer:

7.4 watt

Explanation:

Power= V× I

= 3.7×2.0= 7.40 watt

8 0

3 years ago

why is the earth more attracted to the sun gravitational pull than the gravitational pull of the moon

Ierofanga [76]

First, let's take a look at the equation for the force of gravity between two objects:

F = (GMm)/r², where,

G = gravitational constant = 6.67 x 10⁻¹¹
M = mass of one object
m = mass of the other object
r = distance between the two objects

From this equation, we can see that the force of gravity is directly proportional to the mass of the two objects and inversely proportional to the distance between them. We can then say that the Earth is more attracted to the sun than the moon because of the massive mass of the Sun (1.9891 x 10³⁰) compared to moon (7.3577 x 10²²). Although, the moon is nearer to the Earth, it has little effect to bring down the gravitational pull of the Sun.

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3 years ago

How long will bus take to travel 150 km at an average speed of 40km/hr

romanna [79]

Answer:

3.75 hours

Explanation:

By $v = \frac{d}{t}$

where v is the velocity (or speed in this case)

d is the distance travelled

t is the time taken

$t = \frac{150}{40}=3.75$
Therefore it takes 3.75 hours for the bus to travel 150 km and 40 km/hr.

7 0

2 years ago

The winning time for a 500.0 mile circular race track was 3 hours and

lyudmila [28]

Explanation:

We have,

Distance traveled in a circular track is 500 miles

The winning time was 3 hours and 13 minutes. It means time is 3.217 hours.

The driver's average speed is given by total distance divided by total time taken. Its formula can be written as :

$v=\dfrac{d}{t}\\\\v=\dfrac{500\ miles}{3.217\ h}\\\\v=155.42\ mph$

At the end of the race, the driver reaches the point form where he has started. It means the displacement of the driver is equal to 0. Hence, driver's average velocity is equal to 0.

3 0

3 years ago

An object in space is initially stationary relative to the Earth. Then, a force begins acting on the object, starting with a for

Thepotemich [5.8K]

Answer:

21741 s i believe

Explanation:

8 0

3 years ago