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3 years ago

True or False: The medium moves up and down in a transverse wave.

Physics

1 answer:

kicyunya [14]3 years ago

4 0

False ...................

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A ball traveling with an initial momentum of 5.1 kgm/s bounces off a wall and comes back in the opposite direction with a moment

liubo4ka [24]

Answer:

-9.4 kg m/s

Explanation:

Change in momentum = final momentum − initial momentum

Δp = p − p₀

Δp = -4.3 kg m/s − 5.1 kg m/s

Δp = -9.4 kg m/s

Impulse = change in momentum

J = Δp

J = -9.4 kg m/s

8 0

4 years ago

A particle with charge -5 C initially moves at v = (1.00 i^ + 7.00 j^ ) m/s. If it encounters a magnetic field B =80 Tkˆ, find t

algol [13]

Answer:

The magnetic force is $\= F = 400\r j + 2800\r i$

Explanation:

From the question we are told that

The charge is $q = -5C$

The velocity is $v = (1.00\ \r i + 7.00 \ \r j )\ m/s$

The magnetic field is $B = 80 \r k \ \ T$

Generally the magnetic force is mathematically represented as

$\= F = q \= v \ \ X \ \ \= B$

=> $\= F = -5 (1.0 \r i + 7.0 \r j ) \ \ X \ \ 80 \r k$

=> $\= F = -5.0 \r i + 35\r j \ \ \ X \ \ 80\r k$

=> $\= F = 400\r j + 2800\r i$ N/B - Applied cross - product of unit vector

8 0

4 years ago

6. What is the change in temperature of a metal rod that is 55.0 cm long, decreases length by 0.20 cm, and that has a coefficien

MrMuchimi

Explanation:

We have,

Length of a metal rod is 55 cm or 0.55 m

Change in length is 0.2 cm or 0.002 m

It is required to find the change in temperature of a metal rod. The coefficient of linear expansion is given by :

$\alpha =\dfrac{\Delta L}{L_0\Delta T}$

$\Delta T$ is the change in temperature

$\Delta T =\dfrac{\Delta L}{L_0\alpha }\\\\\Delta T =\dfrac{0.002}{0.55\times 12\times 10^{-6}}\\\\\Delta T= 303.03^{\circ} C$

So, the change in temperature is 303.03 degrees Celsius.

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3 years ago

Clever poster reasoning

nadya68 [22]

To advertise and get the word out of whatever you need to

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3 years ago

What is one reason why rock layers are not horizontal?

Evgesh-ka [11]

One of the most important reasons is that when mountains were built there were events such as tilting. Because of that most of the sedimentary rocks were no longer horizontal.We know that because of the law of original horizontality

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4 years ago