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3 years ago

13

Which statement best compares and contrasts two physical properties of matter?

1 answer:

Stolb23 [73]3 years ago

5 0

Answer:

D

Explanation:

Boiling points and melting points are similar because they both involve the change in a state of a material, but they are different because boiling point involves a change from a liquid to a gas and melting point involves a change from a solid to a liquid.

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What is the weight on Earth of a girl with a mass of 32 kg (F = ma)?

GenaCL600 [577]

Answer:

F = 313.6 N

Explanation:

weight is the force acting on an object due to gravity.

so,

f = ma (m = mass, a = acceleration)
f = 32 × 9.8
f = 313.6 Newton

( note : i have taken acceleration due to gravity as 9.8, it can be taken as an approx of 10, so if you have to take 10, the weight of girl will be 320 Newton )

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3 years ago

What will happen when you slide the sponges in different directions?

Ede4ka [16]

Transform boundary

is the answer from stemscopes

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3 years ago

Which of the following are used in an electrochemical cell?

yanalaym [24]

Answer:

B please give me brainlyest

Explanation:

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3 years ago

A 0.366 kg metal cylinder is placed inside the top of a plastic tube, the lower end of which is sealed off by an adjustable plun

DochEvi [55]

Answer:

$a = 32.6 m/s^2$

Explanation:

As we know that pressure between the cylinder and plunger is increased by 1.59 times

So this will make a net force upwards on the cylinder which is given as

$F = \Delta P A$

now we will have

$\Delta P = P_2 - P_1$

Here initial pressure is given as

$P_1 = P_o + \frac{mg}{A}$

now new pressure is given as

$P_2 = 1.59 P_1$

so we have force on the cylinder given as

$F = P_2A - mg - P_oA$

$F = 1.59(P_0 + \frac{mg}{A})A - (mg + P_0A)$

$F = 0.59(1.01 \times 10^5 \times \pi(7.24 \times 10^{-3})^2 + 0.366(9.81))$

$F = 11.93 N$

now the acceleration is given as

$F = ma$

$11.93 = 0.366 a$

$a = 32.6 m/s^2$

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3 years ago

A ball has a mass of 140 g what is the force needed to accelerate the mall at 25 m/s squared

IRISSAK [1]

3.5 Newton of force is needed to accelerate 140g of ball at 25 m/s^2 using the formula f=ma
Change 140g to kg

8 0

3 years ago

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