It’s a piece of hardware (you can touch it) that changes something on the screen. Examples are a keyboard putting letters on the screen or a mouse moving the cursor

The correct answer is A. true.
It was written in 1948 by the bureau of Labor statistics .
HOPE IT HELPS YOU
D. Por el uso de tubos de vacio.
Answer:
The fastest way to obtain the revocation status of digital certificate of the website is by using Online certificate Status Protocol (OSCP).
Explanation:
Online certificate status protocol is the protocol that help user to check and verify the digital certificate revocation status. This protocol is linked with the digital certificate issuance authority. Whenever someone want to verify the status of the digital certificate that is attached to access the website. The website administrator can send the request to OSCP handler to ensure the status of the certificate. The OSCP handler is connected through certificate issuance authority, send the detail to verify the status. After verifying the status, OSCP handler respond as certificate is valid or revoked to the concerned user.
The correct answer is centrifugal force.
The force that pulls out from the center on a body that is in a circular motion is called centrifugal force. This force increases as the speed of motion increases. It is centrifugal force that results in a strong outward pull on your vehicle traveling around a corner.