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2 years ago

The unit of mass is fundamental unit

2 answers:

8 0

The main reason the unit of mass is a fundemental unit, is because that's what the act states. However, the equations exist in a way that any set of units can be defined as fundemental. For example, the SI unit of electricity is the ampere, and the derived units do not have fractional powers.

Irina18 [472]2 years ago

7 0

Answer:

Kilogram and symbol kg.

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Otrada [13]

Answer:

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2 years ago

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Alona [7]

Answer:

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Explanation:

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2 years ago

A heater has resistance of 10 ohms. It operates at 120 volts. a. What is the current through the heater?

Natali5045456 [20]

Answer:

I = 12 A

Explanation:

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2 years ago

A vertical spring (spring constant =160 N/m) is mounted on the floor. A 0.340-kg block is placed on top of the spring and pushed

AleksandrR [38]

(a) 3.5 Hz

The angular frequency in a spring-mass system is given by

$\omega=\sqrt{\frac{k}{m}}$

where

k is the spring constant

m is the mass

Here in this problem we have

k = 160 N/m

m = 0.340 kg

So the angular frequency is

$\omega=\sqrt{\frac{160 N/m}{0.340 kg}}=21.7 rad/s$

And the frequency of the motion instead is given by:

$f=\frac{\omega}{2\pi}=\frac{21.7 rad/s}{2\pi}=3.5 Hz$

(b) 0.021 m

The block is oscillating up and down together with the upper end of the spring. The block will lose contact with the spring when the direction of motion of the spring changes: this occurs when the spring is at maximum displacement, so at

x = A

where A is the amplitude of the motion.

The maximum displacement is given by Hook's law:

$F=kA$

where

F is the force applied initially to the spring, so it is equal to the weight of the block:

$F=mg=(0.340 kg)(9.81 m/s^2)=3.34 N$

k = 160 N/m is the spring constant

Solving for A, we find

$A=\frac{F}{k}=\frac{3.34 N}{160 N/m}=0.021 m$

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2 years ago

Like pole of magnet ----------each other

Lady_Fox [76]

Answer:

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8 0

2 years ago

The unit of mass is fundamental unit​

The unit of mass is fundamental unit