4 years ago

How is the kelvin scale different from the Celsius scale?

Physics

1 answer:

k0ka [10]4 years ago

5 0

Difference is between the freezing point of water and the boiling point of water.

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A train rolls to a stop along a horizontal track without the conductor applying the brakes. What answer choice BEST explains why

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Answer:

Explanation:

Friction always eventually stops whatever is in motion.

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4 years ago

6. Is an object moving in uniform circular motion accelerating? Explain.

n200080 [17]

An object moving in a circle is accelerating. Accelerating objects are objects which are changing their velocity.

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3 years ago

4. Protons and neutrons are held together to form this _________

Olenka [21]

Answer:

strong nuclear force.

Explanation:

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2 years ago

Speakers A and B are vibrating in phase. They are directly facing each other, are 8.2 m apart, and are each playing a 78.0 Hz to

Stels [109]

Answer:6.298,4.1,1.9015

Explanation:

Wavelength= $\frac{velocity of sound }{frequency}$

= $\frac{343}{78}$ =4.397 m

Distance of 3rd speaker from speaker A is x

From B 78-x

Difference between the distances must be a whole number of wavelengths

First

$x-\left ( 8.2-x\right )=4.397$ for 1 st wavelength

2x=8.2+4.397=12.597

x=6.298m

second

For zero wavelength

$x-\left ( 8.2-x\right )=0$

2x=8.2

x=4.1m

Third

$\left ( 8.2-x\right )-x=4.397$

x=1.9015 m

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3 years ago

a car travelling at 50km/h from rest covers a distance of 10km in 40minutes. Calculate the acceleration

Margarita [4]

Answer:

$9.67\cdot 10^{-3}m/s^2$

Explanation:

We can solve the problem by using the following suvat equation:

$v^2-u^2=2as$

where

v is the final velocity

u is the initial velocity

a is the acceleration

s is the displacement

For the car in this problem:

u = 0 (it starts from rest)

$v=50 km/h \cdot \frac{1000}{3600}=13.9 m/s$ is the final velocity

s = 10 km = 10 000 m is the displacement

Solving for a, we find:

$a=\frac{v^2-u^2}{2s}=\frac{13.9^2}{2(10000)}=9.67\cdot 10^{-3}m/s^2$

7 0

3 years ago