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3 years ago

Which statement is wrong?

Physics

1 answer:

Neporo4naja [7]3 years ago

4 0

Answer:

2. Adding the same amount of heat to two different objects will produce the same increase in temperature.

Explanation:

Different materials have different specific heat capacity. The heat applied is proportional to the product of the mass, specific heat capacity and temperature rise of a substance.

This statement is false because applying the same heat to two different substances does not produce the same temperature increase.

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What is one property of a suspension that is different from that of a solution or a colloid?

Step2247 [10]

Answer:

Explanation:

If left to rest it will separate.

3 0

3 years ago

Find the time t2 that it would take the charge of the capacitor to reach 99.99% of its maximum value given that r=12.0ω and c=50

defon

Answer:

Explanation:

Given that, .

R = 12 ohms

C = 500μf.

Time t =? When the charge reaches 99.99% of maximum

The charge on a RC circuit is given as

A discharging circuit

Q = Qo•exp(-t/RC)

Where RC is the time constant

τ = RC = 12 × 500 ×10^-6

τ = 0.006 sec

The maximum charge is Qo,

Therefore Q = 99.99% of Qo

Then, Q = 99.99/100 × Qo

Q = 0.9999Qo

So, substituting this into the equation above

Q = Qo•exp(-t/RC)

0.9999Qo = Qo•exp(-t / 0.006)

Divide both side by Qo

0.9999 = exp(-t / 0.006)

Take In of both sodes

In(0.9999) = In(exp(-t / 0.006))

-1 × 10^-4 = -t / 0.006

t = -1 × 10^-4 × - 0.006

t = 6 × 10^-7 second

So it will take 6 × 10^-7 a for charge to reached 99.99% of it's maximum charge

8 0

3 years ago

Is the following chemical equation balanced? MgI2 + Br2 MgBr2 + I2 yes no

Brums [2.3K]

Yes

Explanation:

This chemical equation:

$Mg I_2 + Br_2 \rightarrow Mg Br_2 + I_2$

is balanced, because the number of atoms of each element is the same on the reactant side and on the product side. In fact:

- Mg: one atom on the left, one on the right

- I: 2 atoms on the left, and 2 on the right

- Br: 2 atoms on the left, and 2 on the right

So, the reaction is balanced.

3 0

3 years ago

Read 2 more answers

As a freely falling object picks up downward speed, what happens to the power supplied by the gravitational force?

vitfil [10]

We will start from the definition of power in terms of the Force. Power could be described as the change of energy in an instant of time. Considering that Energy is the product between the Force and the distance traveled we would arrive at the expression

$P = \frac{E}{t}$

$P = \frac{F*h}{t}$

Here,

F = Force

h = Height

t = Time

As there is no external force, apart from the force of gravity, and this, is constant during the course of the object we will also have to be constant power and therefore this during its course will be the same. The correct answer is (1)

4 0

4 years ago

A gas cylinder contains argon atoms (m=40.0 u). The temperature is increased from 286 K (13°C) to 362 K (89°C) (a) What is the c

Rama09 [41]

Answer:

(a). The change in the average kinetic energy per atom is $1.57\times10^{-21}\ eV$ .