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3 years ago

How do you find density of a regular solid?

1 answer:

3 0

Put the object or material on a scale to figure out its mass. 3. Divide the mass by the volume to figure out the density (p = m / v). You may also need to know how to calculate the volume of a solid so use the formula

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Is there any difference between reflection and echo???

Fofino [41]

Answer:

reflection is the act of reflecting or the state of being reflected while echo is

reflection of sound waves from a surface back to the initial listener

6 0

3 years ago

A block with a weight of 9.0 N is at rest on a horizontal surface. A 1.2 N upward force is applied to the block by means of an a

lesya [120]

Answer:

a) 9 - 1.2 = 7.8 N

b) Since the force exerted by the box is it's weight, it acts in a downward direction. So the box will exert a force downward (perpendicular to the horizontal surface).

Explanation:

A 9N block would exert 9N of normal force on the horizontal plane under normal conditions. But in this case, we have a spring taking away some of the force by applying an upward force on the box.

So the force exerted by the box on the surface would now be:

a) 9 - 1.2 = 7.8 N

b) Since the force exerted by the box is it's weight, it acts in a downward direction. So the box will exert a force downward (perpendicular to the horizontal surface).

8 0

3 years ago

an airplane is moving with a constant velocity in level flight. compare the magnitude of the forward force by the engines to the

Iteru [2.4K]

The two forces are equal in magnitude

Explanation:

We can answer this question by applying Newton's second law of motion, which states that

$\sum F = ma$

where

$\sum F$ is the net force acting on an object

m is the mass of the object

a is its acceleration

In this problem, the airplane is moving with constant velocity, so its acceleration is zero:

a = 0

This means that the equation becomes

$\sum F = 0$

There are two forces acting on the airplane in the horizontal direction:

- The forward force exerted by the engine, F

- The frictional drag force, D, backward

So the net force on the plane along the horizontal direction is

$\sum F = F-D$

However we also said that

$\sum F = 0$

Combining the two equations, we find

$F-D=0 \rightarrow F=D$

So, the two forces have same magnitude.

Learn more about Newton's second law:

brainly.com/question/3820012

#LearnwithBrainly

5 0

3 years ago

Find the exponent A in the equation

hodyreva [135]

Start by swapping the variables in the equations with their units (leave A alone for now): $v=\frac{a^2t^A}{x} \Rightarrow \frac{L}{T} = \frac{ (\frac{L}{T^2})^2 T^A }{L}$

Multiply by L and square the fraction: $\frac{L^2}{T} = \frac{L^2}{T^4} T^A \Rightarrow \frac{L^2}{T} \div \frac{L^2}{T^4}=T^A$

Divide the fraction by multiplying by the reciprocal: $\frac{L^2}{T} \times \frac{T^4}{L^2} = T^A \Rightarrow T^3=T^A$

Therefore A=3

5 0

3 years ago

Arti mimpi ketika disuruh mandi bersama orang tua

poizon [28]

Aku udah tanya ama orang yang ngerti tafsiran kemarin, artinya kamu punya suatu masalah yang terpendam pada orang tua kamu.

Maksud dari mandi bersama dalam konteks mimpi ini adalah kalian harus membersihkan semuar rasa permasalahan - permasalahan yang kalian pendam dari diri kalian dan mulai hubungan kalian dari awal dengan hati yang bersih

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3 years ago