Applications of waves practice exercise 3

A doctor at Kenyatta National Hospital uses X-ray images to check for broken bones. Explain how X-rays work in diagnosis and why they are suitable for this purpose. (2 marks)

A doctor at Kenyatta National Hospital uses X-ray images to check for broken bones. Explain how X-rays work in diagnosis and why they are suitable for this purpose. (2 marks)

A doctor at Kenyatta National Hospital uses X-ray images to check for broken bones. Explain how X-rays work in diagnosis and why they are suitable for this purpose. (2 marks)

A local radio station in Meru broadcasts news every morning. How do people receive this news using waves? (1 mark)

A local radio station in Meru broadcasts news every morning. How do people receive this news using waves? (1 mark)

A local radio station in Meru broadcasts news every morning. How do people receive this news using waves? (1 mark)

A fisherman on Lake Naivasha uses a sonar device to locate fish. Explain how sonar uses waves to achieve this and why it's effective in water. (2 marks)

A fisherman on Lake Naivasha uses a sonar device to locate fish. Explain how sonar uses waves to achieve this and why it's effective in water. (2 marks)

A fisherman on Lake Naivasha uses a sonar device to locate fish. Explain how sonar uses waves to achieve this and why it's effective in water. (2 marks)

At a school in Eldoret, students complained of poor Wi-Fi signal in some classrooms. Use your knowledge of wave behavior to explain why the signal is strong in some areas and weak in others. (2 marks)

At a school in Eldoret, students complained of poor Wi-Fi signal in some classrooms. Use your knowledge of wave behavior to explain why the signal is strong in some areas and weak in others. (2 marks)

At a school in Eldoret, students complained of poor Wi-Fi signal in some classrooms. Use your knowledge of wave behavior to explain why the signal is strong in some areas and weak in others. (2 marks)

David used a remote control to change the channel on the TV while sitting across the room. Which type of wave made this possible, and how? (1 mark)

David used a remote control to change the channel on the TV while sitting across the room. Which type of wave made this possible, and how? (1 mark)

David used a remote control to change the channel on the TV while sitting across the room. Which type of wave made this possible, and how? (1 mark)

Explain how satellite TV uses waves to deliver content to homes in rural areas of Kenya, and mention one factor that can interfere with this signal. (2 marks)

Explain how satellite TV uses waves to deliver content to homes in rural areas of Kenya, and mention one factor that can interfere with this signal. (2 marks)

Explain how satellite TV uses waves to deliver content to homes in rural areas of Kenya, and mention one factor that can interfere with this signal. (2 marks)

Mary lives in Kisumu and her cousin lives in Nairobi. They talk every weekend using their mobile phones. Explain how this is possible using your knowledge of waves. (1 mark)

Mary lives in Kisumu and her cousin lives in Nairobi. They talk every weekend using their mobile phones. Explain how this is possible using your knowledge of waves. (1 mark)

Mary lives in Kisumu and her cousin lives in Nairobi. They talk every weekend using their mobile phones. Explain how this is possible using your knowledge of waves. (1 mark)

Refer to the image below of an ultrasound scan. How are waves used to help doctors see inside the body? (1 mark)

Refer to the image below of an ultrasound scan. How are waves used to help doctors see inside the body? (1 mark)

Refer to the image below of an ultrasound scan. How are waves used to help doctors see inside the body? (1 mark)

Look at the image below of the microwave oven. How are waves used in the microwave to heat food? (1 mark)

Look at the image below of the microwave oven. How are waves used in the microwave to heat food? (1 mark)

Study the image below of the microwave oven. How are waves used in the microwave to heat food? (1 mark)

While travelling from Kisii to Nairobi, Pamela noticed that her phone signal kept going off and returning. Use your understanding of wave transmission to explain two possible reasons why this happened. (2 marks)

While travelling from Kisii to Nairobi, Pamela noticed that her phone signal kept going off and returning. Use your understanding of wave transmission to explain two possible reasons why this happened. (2 marks)