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3 years ago

How do line symmetry differ from rotational symmetry?.

Physics

1 answer:

sergeinik [125]3 years ago

3 0

Answer:

A line of symmetry is a line that separates a shape into two identical halves.
Rotational symmetry is the same thing except when you rotate the object, it has to have the exact same line of symmetry.

Hope this helps!!!

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In a two-slit experiment, the slit separation is 3.00 × 10-5 m. The interference pattern is created on a screen that is 2.00 m a

balu736 [363]

Answer:

The value is $\lambda = 214.3 \ nm$

Explanation:

From the question we are told that

The slit separation is $d = 3.00 * 10^{-5} m$

The distance of the screen is $D = 2.00\ m$

The order of fringe is n = 7

The path difference is $y = 10.0 \ cm = 0.1 \ m$

Generally the path difference is mathematically represented as

$y = \frac{n * \lambda * D}{ d}$

=> $0.1 = \frac{7 * \lambda * 2.00 }{ 3.00 * 10^{-5}}$

=> $\lambda = \frac{0.1 *3.00 * 10^{-5} }{7 * 2.00 }$

=> $\lambda = 2.143 *10^{-7} \ m$

=> $\lambda = 214.3 \ nm$

6 0

3 years ago

Explain Using the equation for translational kinetic energy, show why a car moving at 40 m/s has four times the translational ki

djverab [1.8K]

Answer:

Explanation:

Equation for translational kinetic energy = 1/2 m V² where m is mass and V is velocity .

In first case let mass of car be m

Translational kinetic energy = 1/2 m x 40² = 800 m .

In the second case ,

Translational kinetic energy = 1/2 m x 20² = 200 m

So , in former case kinetic energy of car is 4 times that of second case.

7 0

3 years ago

An arrow of 43 g moving at 84 m/s to the right, strikes an apple at rest. The arrow sticks to the apple and both travel at 16.8

Aloiza [94]

Answer:

The mass of the apple is 0.172 kg (172 g)

Explanation:

The Law Of Conservation Of Linear Momentum

The total momentum of a system of bodies is conserved unless an external force is applied to it. The formula for the momentum of a body with mass m and speed v is

P=mv.

If we have a system of two bodies, then the total momentum is the sum of both momentums:

$P=m_1v_1+m_2v_2$

If a collision occurs and the velocities change to v', the final momentum is:

$P'=m_1v'_1+m_2v'_2$

Since the total momentum is conserved, then:

P = P'

Or, equivalently:

$m_1v_1+m_2v_2=m_1v'_1+m_2v'_2$

If both masses stick together after the collision at a common speed v', then:

$m_1v_1+m_2v_2=(m_1+m_2)v'$

We are given the mass of an arrow m1=43 g = 0.043 kg traveling at v1=84 m/s to the right (positive direction). It strikes an apple of unknown mass m2 originally at rest (v2=0). The common speed after they collide is v'=16.8 m/s.

We need to solve the last equation for m2:

$m_2v_2-m_2v'=m_1v'-m_1v_1$

Factoring m2 and m1:

$m_2(v_2-v')=m_1(v'-v_1)$

Solving:

$\displaystyle m_2=\frac{m_1(v'-v_1)}{v_2-v'}$

Substituting:

$\displaystyle m_2=\frac{0.043(16.8-84)}{0-16.8}$

$\displaystyle m_2=\frac{-2.8896}{-16.8}$

$\displaystyle m_2=0.172\ kg$

The mass of the apple is 0.172 kg (172 g)

3 0

3 years ago

Which type of wave is a sound wave ?

mestny [16]

Technically, both B and D are correct when transmitted through solids, but your answer (and the answer I got from taking the test) will be

D) Longitudinal

Hope this helps!

4 0

3 years ago

An object has a constant velocity of 20 m/s to the north, and there are two forces acting on it. What is this situation called

Llana [10]

When an object move with a constant velocity and there are forces acting on it, this is called unbalanced force. The forces acting on an object is a net force, which is capable of changing speed and/or direction of motion of an object. However, the two forces acting on the object can be added together to give the resultant force, which is a single force that has the same effect on the object as all the individual forces acting together.

5 0

3 years ago

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