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4 years ago

Which sentences describes an object that has kinetic energy

1 answer:

3 0

Anything associated with the movement of objects has kinetic energy.
Examples are river flowing, moving cars, wind mills, or even just simple walking and running

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If constants aren't given in an experiment, what can be constant in the experiment?

mario62 [17]

Answer:

Anything in an experiment that remains unchanged.

Explanation:

An example could be the temperature of the laboratory room. If there is something that has an effect on an experiment that is not variable, it is a constant. Another constant could be, say, if you were doing calculations with the same amount and kind of fluid throughout the experiment, then that fluid would also be a constant.

6 0

3 years ago

A teaspoonful of white dwarf material on earth would weigh

sashaice [31]

Answer:

15 tons

Explanation:

4 0

3 years ago

When different resistors are connected in parallel across an ideal battery, we can be certain that: a) their equivalent resistan

sergeinik [125]

Answer:

b) the potential difference across each is the same.

Explanation:

When resistors are connected in parallel with each other

then the terminals of all the resistors will connected across the terminals of the battery

So we know the potential difference of the battery is same across all the resistors

So we can say that the equivalent resistance of all the resistance is

$\frac{1}{R} = \frac{1}{R_1} + \frac{1}{R_2} + \frac{1}{R_3}$

so its not the mean of all resistors

also we know that the resistance are all different so power across each resistance is different given as

$P = \frac{V^2}{R}$

also current in each resistance is also different and given by

$i = \frac{V}{R}$

so correct answer will be

b) the potential difference across each is the same.

5 0

3 years ago

What is the value of sin r and sin i in physics

taurus [48]

Answer:

★The second law of refraction

The ratio of sine of angle of incidence to the sine of angle of refraction is a constant for a light of given colour and for a given pair of media. This law is also called Snell's law of refraction. If 'i' is the angle of incidence and 'r' is the angle of refraction then, Sin i/Sin r = constant

This constant value is called the refractive index of the second medium with respect to the first.

7 0

3 years ago

What two things does the wavelength of peak of the blackbody

Georgia [21]

Answer:

The correct option is;

c. Temperature and color

Explanation:

Based on Wien's Law which can be presented mathematically as follows;

$\lambda _{max} = (0.29 \ cm \ K) / T$

The wavelength of the peak of the blackbody curve tells the temperature and color.

An example is the Sun that has a temperature of 5800 K, hence the peak wavelength is given by $\lambda _{max} = (0.29 \ cm \ K) / 5800 = 0.00005 \ cm$ = 500 nano-meter from which the color can be deduced as 500 nano-meter is the wavelength of yellow light.

8 0

4 years ago