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3 years ago

How is thermal energy being transferred between the water and the thermometer?

Physics

1 answer:

Goshia [24]3 years ago

8 0

Answer:

When the thermometer is warmed, the liquid expands by more than the volume of the hollow space in which it is confined, and so some of it must move from the bulb into the capillary tube. It should be conduction and then convection/advection, not radiation. Radiation is usually the slowest heat transfer.

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A 500,000 kg cargo ship is traveling at 75 km/h when its engine is shut off. The magnitude of the frictional force between boat

Ymorist [56]

Answer:1.8 hr

Explanation:

Given

mass of cargo=500,000 kg

initial speed $=75 km/h\approx 20.833 m/s$

Frictional force=85 v

at t=0 engine is shut off so acquired speed is slowly decreasing

$85v=-500,000\frac{\mathrm{d} v}{\mathrm{d} t}$

$85dt=-\frac{dv}{v}$

Integrating both sides

$85\int_{0}^{t}dt=-500,000\int_{20.83}^{6.944}\frac{dv}{v}$

$85t=500,000\ln \frac{1}{3}$

t=6462.425 s

t=1.8 hr

4 0

3 years ago

a tire rolls from rest to an angular velocity of 6 radians per second. the angle it turns through is 12 radians. what is the ang

True [87]

Answer:

$\alpha =1.5\ rad/s^2$

Explanation:

Given that,

Initial angular velocity, $\omega_i=0$

Final angular speed, $\omega_f=6\ rad/s$

Angular displacement, $\theta=12\ rad$

We need to find the angular acceleration of the tire. We can find it using the third equation of rotational kinematics. So,

$\omega_f^2-\omega_i^2=2\alpha \theta\\\\\alpha =\dfrac{\omega_f^2-\omega_i^2}{2\theta}\\\\\alpha =\dfrac{6^2-0^2}{2\times 12}\\\\\alpha =1.5\ rad/s^2$

So, the angular acceleration of the tire is equal to $1.5\ rad/s^2$ .

7 0

3 years ago

During an experiment, you take a measurement of 18.3 inches. What is this measurement in centimeters? 1 in = 2.54 cm

Phoenix [80]

I Think The answer would be c I hope it helps My friend Message Me if I’m wrong and I’ll change My answer and fix it for you

8 0

4 years ago

Read 2 more answers

What is the speed of an object at rest

sammy [17]

The speed of an object is measured by calculating the distance it travels per unit time.
The formula in Physics for calculating speed is = distance/ time.

Since an object at rest is not covering any distance, the speed is always assumed to be 0 m/s.

4 0

3 years ago

How you would orient the magnets and what you would do with the magnets to achieve maximum repulsion

Westkost [7]

The orientation of the magnets that gives the strongest repulsion because these poles and facing each other that is then leaves highest flux density of the poles for a force of repulsion to be very high

3 0

3 years ago