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4 years ago

Recreational time can come before our after school

Physics

2 answers:

Dafna11 [192]4 years ago

8 0

Answer:

TRUE

Explanation:

Studentka2010 [4]4 years ago

6 0

After school recreational time always come

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How much energy is required to increase the temperature of

Basile [38]

Explanation:

Q=msdt

= 2 x 128 x (7-4)

=256 x 3

= 768 J

6 0

3 years ago

The temperature of a gas is increased by 10degree Celsius. what is the corresponding change on Fahrenheit scale?

Grace [21]

On a Fahrenheit thermometer, the gas becomes 18 degrees warmer.

8 0

3 years ago

A ruby laser delivers a 16.0-ns pulse of 4.20-MW average power. If the photons have a wavelength of 694.3 nm, how many are conta

stepan [7]

Answer:

The value is $n = 2.347 *10^{17} \ photons$

Explanation:

From the question we are told that

The amount of power delivered is $P = 4.20 \ M W = 4.20 *10^{6} \ W$

The time taken is $t = 16.0ns = 16.0 *10^{-9} \ s$

The wavelength is $\lambda = 694.3 \ nm = 694.3 *10^{-9} \ m$

Generally the energy delivered is mathematically represented as

$E = P * t = \frac{n * h * c }{\lambda }$

Where $h$ is the Planck's constant with value $h = 6.262 *10^{-34} \ J \cdot s$

c is the speed of light with value $c = 3.0*10^{8} \ m/s$

$4.20 *10^{6} * 16*10^{-9}= \frac{n * 6.626 *10^{-34} * 3.0*10^{8} }{694.3 *10^{-9}}$

=> $n = 2.347 *10^{17} \ photons$

4 0

3 years ago

When you release the mass, what do you observe about the energy?

anygoal [31]

Explanation:

Mass and energy are closely related. Due to mass–energy equivalence, any object that has mass when stationary (called rest mass) also has an equivalent amount of energy whose form is called rest energy, and any additional energy (of any form) acquired by the object above that rest energy will increase the object's total mass just as it increases its total energy. For example, after heating an object, its increase in energy could be measured as a small increase in mass, with a sensitive enough scale.

3 0

3 years ago

A certain car going from Atlanta to Philadelphia averages 24.0 m/s over the course of the trip. Determine how long it takes the

Dennis_Churaev [7]

Answer:

14.5 hours

Explanation:

The relationship between speed, time and distance for a uniform motion is

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