The energy absorbed or released during a reaction in which a substance is produced is called the

Physics

1 answer:

sweet [91]3 years ago

7 0

the answer is bond energy but I am not pretty sure

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Can a physical guantity have unit but is dimensionless ?

Goshia [24]

Ans: A quantity cannot have units until it has dimensions. A quantity that has dimensions must have units. Yes a quantity have units but still be dimensionless for example,unit of angle is radian ,but it is a dimensionless quantity. A dimensionless quantity may have unit.

5 0

3 years ago

A small metal sphere weighs .28 N in air and has a volume of13

Ray Of Light [21]

To solve this problem we will start by considering how to calculate the apparent weight. On the sphere this will then be given that the real weight is the sum of the apparent weight and the Buoyant Force. Therefore we will have to

$W_T = W_A + F_B$

Here

$W_T$ = True Weight

$W_A$ = Apparent Weight

$F_B$ = Buoyant Force

If we seek to find the apparent weight we will have to,

$W_A = W_T-F_B$

$W_A = 0.28N - V\rho g$

Remember that

V = Volume (Volume Sphere)

$\rho$ = Density (At this case water density)

g = Gravitational acceleration

$W_A = 0.28N - (13*10^{-6}m^3)(1000kg/m^3)(9.8)$

$W_A = 0.1526N$

Therefore the apparent weight will be 0.1526N

5 0

4 years ago

According to Lenz's law, an induced current in the direction depicted in the picture would be created when: a. An external downw

LenKa [72]

Answer:

C. An external downward field is created or an external downward field is removed

Explanation:

As we can see that from the attached figure that the induced current would be counter clockwise. So the field occur because of induced current i.e. out of page. This represent that the current is induced in order to rise the flux out of the direction of the page

Therefore because of the external field, the field out of page & flux would be reducing or the external upward field is eliminated

So option C is correct