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3 years ago

Is a measure of waves that passes a point in a given amount of time

Physics

1 answer:

GREYUIT [131]3 years ago

8 0

FREQUENCY is the number of complete waves that pass a given point in a certain amount of time.

Good luck :)

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A bullet with a mass of 0.00658 kg is fired through a 1.95 kg block of wood on a frictionless surface. The initial speed of the

Svetradugi [14.3K]

The final velocity of the block is 1.29 m/s

Explanation:

We can solve this problem by using the principle of conservation of momentum: in fact, the total momentum of the system must be conserved before and after the collision. Therefore, we can write:

$p_i = p_f\\m_1 u_1 + m_2 u_2 = m_1 v_1 + m_2 v_2$

where:

$m_1 = 0.00658 kg$ is the mass of the bullet

$u_1 = 822 m/s$ is the initial velocity of the bullet

$v_1 = 439 m/s$ is the final velocity of the bullet

$m_2 = 1.95 kg$ is the mass of the block

$u_2 = 0$ is the initial velocity of the block

$v_2$ is the final velocity of the block

Re-arranging the equation and solving for v2, we find:

$v_2 = \frac{m_1 u_1 - m_1 v_1}{m_2}=\frac{(0.00658)(822)-(0.00658)(439)}{1.95}=1.29 m/s$

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5 0

3 years ago

Sound waves move the most slowly through

lbvjy [14]

Answer:

Gases

Explanation:

The molecules in a gas are spaced very far apart.

8 0

2 years ago

Read 2 more answers

How does the gravitational force between two objects change if the distance between the objects doubles?

Ymorist [56]

if the distance between the objects is doubled the force is reduced by a factor of 4

<h3>Whats is gravitational force?</h3>

Gravitational force is the force of attraction between objects in the universe.

f = G * m1 * m2 / r^2

f = gravitational force

G = gravitational constant

m1 = mass of object 1

m2 = mass of object 2

r = distance between the objects

From the formular, the gravitational force and the distance is an inverse relationship so increasing the distance by a factor results to reduction of the force by the square of the factor. hence doubling the distance which is distance mutiplied by 2 will lead to reduction of the force by 2^2 = 4

Therefore: The force decreases by a factor of 4.

hope it helps

4 0

1 year ago

A fixed 15.3-cm-diameter wire coil is perpendicular to a magnetic field 0.77 T pointing up. In 0.20 s , the field is changed to

maksim [4K]

Answer:

Induced emf will be 0.468 volt

Explanation:

We have given diameter of wire d = 15.3 cm

So radius $r=\frac{d}{2}=\frac{15.3}{2}=7.65cm$

So area $A=\pi r^2=3.14\times (7.65)^2=183.76\times 10^{-4}m^2$

Change in magnetic field dB = 0.26 - 0.77 = -0.51 T

Time for change in magnetic field dt = 0.26 sec

We know that emf is given by $e=\frac{-d\Phi }{dt}=-A\frac{dB}{dt}=-183.76\times 10^{-4}\times \frac{-0.51}{0.2}=0.0468volt$

5 0

2 years ago

How does hydroelectric energy work

lions [1.4K]

<span>The water is held behind a dam, forming reservoir. The force of the water being released from the reservoir through the dam spins the blades of a giant turbine.</span>

6 0

2 years ago