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3 years ago

What is the solution to the problem expressed to the correct number of significant figures?

Physics

1 answer:

oksian1 [2.3K]3 years ago

7 0

Answer:

73.72

Explanation:

For this subtraction problem, the answer or solution is expressed to the least precise of the numbers we are trying to subtract.

The least precise number is the number with the lowest significant numbers:

105.4 - 31.681

105.4 has 4 significant numbers

31.681 has 5 significant numbers

So;

105.4

- 31.681

------------------

73.719

----------------

The solution is therefore 73.72

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What is radioactive dating? How is it used to determine age of something?

Liono4ka [1.6K]

Answer:

Technique of comparing abundance ratio between radioactive isotopes to a reference isotope to determine the age of a material called radioactive dating. It determines the age by having a more abundance of isotopes in the cellular being.

6 0

2 years ago

A 3.0-A current is maintained in a simple circuit that consists of a resistor between the terminals of an ideal battery. If the

harina [27]

Answer:

$R=2.78\ \Omega$

Explanation:

Given that,

The current flowing in the circuit, I = 3 A

The power of the battery, P = 25 W

We need to find the resistance of the battery. We know that the power of the battery is given by the formula as follows :

$P=I^2R$

Put all the values to find R.

$R=\dfrac{P}{I^2}\\\\R=\dfrac{25}{(3)^2}\\\\R=2.78\ \Omega$

So, the resistance is equal to $2.78\ \Omega$ .

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3 years ago

Refrigerant-134a enters an adiabatic compressor as saturated vapor at -24C and leaves at 0.8 MPa and 60C. When the mass flow r

sergey [27]

Answer:

= 287kW

Explanation:

Knowing the enthalpy data, we have to

$h1=239.16kJ/kg\\h2=296.81kJ/kg$

So,

$E_i_n_p_u_t=mh_1$

Here,

m=mass flow rate

h= Enthalpy of refrigerant at the compressor

Replacing

= 1.2 × 239.16

= 287kW

4 0

3 years ago

Vector B~ has x, y, and z components of 8.7,

blagie [28]

Answer:

The magnitude of B is $10.95\ units$

Explanation:

we know that

The magnitude of Vector B is

$B=\sqrt{x^{2}+y^{2}+z^{2}}$

where

x,y and z are the components of vector B

we have

$x=8.7\ units, y=1.4\ units,z=6,5\ units$

substitute

$B=\sqrt{8.7^{2}+1.4^{2}+6.5^{2}}$

$B=\sqrt{119.9}$

$B=10.95\ units$

3 0

3 years ago

Processes such as dissolving, melting, freezing, and evaporationg can affect the appearance of a substance, but the identity of

Vlada [557]

The answer to this question is D

8 0

3 years ago