Physics Middle School

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Key Stage 3 Science - Physics
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Question 37 of 45
A wave has a wavelength of 10 m and a speed of 65 m/s. What is the frequency of this wave in Hz?
Hz
Enter your answer as a number
CA
9
O

Answers

Answer 1

Answer: frequency = 6.5 Hz

Explanation:

Given that the

Speed V = 65 m/s

Wavelength (λ) = 10m

Wave speed is the product of frequency and wavelength. That is,

V = fλ

Substitute V and (λ) into the formula to get frequency f

65 = 10f

Make f the subject of formula

f = 65/10

f = 6.5 Hz

Therefore, the frequency of this wave is 6.5 Hz?

Related Questions

May I please get some help?

A unicorn running on a beach at 8 m/s changes speed at a constant rate of 2.7
m/s2 over a period of 2 seconds. What is the unicorn's velocity at the end of this
time?​

Answers

Answer:

13.4 m/s

Explanation:

Write down what you have, so:

V0=8 m/s

a=2.7 m/s^2

t=2 seconds

We are trying to find final velocity, so we will use vf = v0 + at

From there, we plug in the given values.

vf = 8 m/s + (2.7 m/s^2 x 2 seconds)

vf = 13.4 m/s

Answer:

about 13s

Explanation:

A projectile is fired vertically upwards and reaches a height of 78.4 m. Find the velocity of projection and the time it takes to reach its highest point.

Answers

Answer:

1.) U = 39.2 m/s

2.) t = 4 seconds

Explanation: Given that the

height H = 78.4m

The projectile is fired vertically upwards under the acceleration due to gravity g = 9.8 m/s^2

Let's assume that the maximum height = 78.4m. And at maximum height, final velocity V = 0

Velocity of projections can be achieved by using the formula

V^2 = U^2 - 2gH

g will be negative as the object is moving against the gravity

0 = U^2 - 2 × 9.8 × 78.4

U^2 = 1536.64

U = sqrt( 1536.64 )

U = 39.2 m/s

The time it takes to reach its highest point can be calculated by using the formula;

V = U - gt

Where V = 0

Substitute U and t into the formula

0 = 39.2 - 9.8 × t

9.8t = 39.2

t = 39.2/9.8

t = 4 seconds.

How did the angel of the pendulum affect the period

Answers

Answer:The starting angle of a pendulum does not affect its period for .

Explanation: however, the period increases with increasing . The starting angle of a pendulum does not affect its period for.

What is the weight, on Earth, of a book with a mass of 1.5 kg?
0 15 N
6.5 N
11.3.N
147 N

Answers

Answer:14.7 N

[tex]solution \\ mass = 1.5 \: kg \\weight = m \times \: g \\ \: \: \: \: \: \: \: \: \: \: \: \: = 1.5 \times 9.8 \\ \: \: \: \: \: \: \: \: \: = 14.7 \: newton[/tex]

hope this helps...

Good luck on your assignment...

Given:

Mass,m = 1.5 kg

Acceleration due to gravity,g = 9.8 m/s² [ constant ]

To find out:

Find the weight?

Formula used:

Weight = m × g

Solution:

Weight of book = m × g

★ Putting the values in the above formula,we get:

Weight of book = 1.5 × 9.8

= 15/10 × 98/10

= 1,470/100

= 14.7 kg.m/s²

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