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3 years ago

5. A pendulum is 0.25 m long. What is the frequency of its oscillations?

Physics

1 answer:

vodka [1.7K]3 years ago

6 0

Answer:

I would say your answer is: The frequency of oscillations is 1 HZ { 1 cycle per second}.

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The largest origin of nonpoint pollution in the united states is A) rain B) industry C) agriculture

guajiro [1.7K]

The answer would be : A

6 0

3 years ago

Refraction or the bending of waves takes place when a light wave changes A) color. B) frequency. C) intensity. D) speed.

DENIUS [597]

The answer is D. speed

6 0

4 years ago

Read 2 more answers

4. Find the uniform acceleration that causes a car’s velocity to change from 32m/s to

GrogVix [38]

Answer:

$a=8\ m/sec^2$

Explanation:

we know that

The formula to calculate the acceleration is

$a=\frac{V_2-V_1}{t}$

we have

$V_2=96\ m/sec$

$V_1=32\ m/sec$

$t=8\ sec$

substitute

$a=\frac{96-32}{8}$

$a=8\ m/sec^2$

4 0

4 years ago

Which of the following statements is FALSE about collisions? (Consider Newton's Laws an the Conservation of Momentum.)

pantera1 [17]

The following statements are false about collisions: 

The velocity change of two respective objects involved in a collision will always be equal.
Total momentum is always conserved between any two objects involved in a collision.

Answer: Option B, and D

Explanation:

In any collisions, equal amount of net force will be acted upon the colliding objects due to the third law of Newton, irrespective of the significance difference in mass of the objects. Similarly, they can also have different acceleration values during collision of two objects if the masses are identical.

But the statements regarding the equal change in velocity of two objects respectively involved in collision always is false, as the conservation of momentum is applicable for isolated system only. So it is true for only isolated system and not in all the systems.

The same reason goes for falsifying the fourth statement which states that total momentum is always conserved between two objects involved in a collision as this statement is only true for isolated system where the conservation of momentum can be applied. Thus the second and fourth statement is false regarding collision.

8 0

3 years ago

A 2:2 kg toy train is con ned to roll along a straight, frictionless track parallel to the x-axis. The train starts at the origi

Liula [17]

Answer:

a) 10.51 J

b) 3.48 m/s

Explanation:

Given data :

mass of train ( M ) = 2.2 kg

Given initial velocity ( u ) = 1.6 m/s

a) calculating work done by the force over the journey of the train

F = mx + b ------ ( 1 )

m = slope = ( Δ f / Δ x ) = 2.8 / -7.5 = - 0.373 N/m

x = distance travelled on the x axis by the train = 7.5 m

F = force experienced by the train = 2.8 N

x = 0

∴ b = 2.8

hence equation 1 can be written as

F = ( -0.373) x + 2.8 ----- ( 2 )

hence to determine the work done by the force

W = $\int\limits^7_0 { ( -0.373) x + 2.8 )} \, dx$ Note: the limits are actually 7.5 and 0

∴ W ( work done ) = -10.49 + 21 = 10.51 J

b) calculate the speed of the train at the end of its journey

we will apply the work energy theorem

W = 1/2 m*v^2 - 1/2 m*u^2

∴ V^2 = 2 / M ( W + 1/2 M*u^2 ) ( input values into equation )

V^2 = 12.11

hence V = 3.48 m/s

6 0

3 years ago