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2 years ago

Thermal energy is added to 4 identical samples of water.what increases in each example

Physics

1 answer:

inessss [21]2 years ago

3 0

I’m pretty sure the tempature starts to rise in each sample.

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A car moving at some speed hits the brakes and skids to a stop after 13 m on a level road. If the coefficient of friction for th

vesna_86 [32]

Answer:

12.974 m/s

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

g = Acceleration due to gravity = 9.81 m/s²

$\mu$ = Coefficient of friction =0.66

a = Acceleration = $\mu g$

$v^2-u^2=2as\\\Rightarrow -u^2=2\mu gs-v^2\\\Rightarrow u=\sqrt{v^2-2\mu gs}\\\Rightarrow u=\sqrt{0^2-2\times -(9.81\times 0.66)\times 13}\\\Rightarrow u=12.974\ m/s$

Car's original speed before braking was 12.974 m/s

6 0

4 years ago

An inductor is connected to an AC power supply having a maximum output voltage of 3.00 V at a frequency of 280 Hz. What inductan

Sergio [31]

Answer:

L = 0.48 H

Explanation:

let L be the inductance, Irms be the rms current, Vrms be the rms voltage and Vmax be the maximum voltage and XL be the be the reactance of the inductor.

Vrms = Vmax/(√2)

= (3.00)/(√2)

= 2.121 V

then:

XL = Vrms/I

= (2.121)/(2.50×10^-3)

= 848.528 V/A

that is L = XL/(2×π×f)

= (848.528)/(2×π×(280))

= 0.482 H

Therefore, the inductance needed to kepp the rms current less than 2.50mA is 0.482 H.

6 0

3 years ago

If the maximum length is 0.3 meters from the equillibrium point what is the and the spring oscillates 100 per minute what is it'

kaheart [24]

20.......................................

5 0

4 years ago

An aerosol can of air freshener is sprayed into a room. what happens to the pressure of the gas if it's temperature stays consta

andrezito [222]

We can use the equation of state for an ideal gas to answer the question:
$pV=nRT$
or, by rewriting it,
$p= \frac{nRT}{V}$
where p is the gas pressure, V its volume, T its temperature, n the number of moles of the gas and R the gas constant.

When the gas is sprayed from the can into the room, its volume V has increased, while n (the number of moles of the gas) stayed the same. Since R is a constant and the temperature T also stayed constant, if we look at the formula we see that the numerator didn't change, while the denominator (V) has increased, so the pressure of the gas has decreased.

7 0

3 years ago

The MRI (Magnetic Resonance Imaging) body scanners used in hospitals operate at a frequency of 400 MHz (M = 106 ). Calculate the

horrorfan [7]

Answer:

Energy, $E=2.65\times 10^{-25}\ J$