A straight ladder should extend at least 3 feet above the work surface or landing for safe access to and from the ladder. This helps provide stability and a secure handhold when climbing up or down.
a plant stands up straight because it is reaching to the light source which is usually straight above it. it will bend to the light if the source is not above it
The surface feature above the mantle plume is known as the "hotspot".
The flame-like structures that extend from the chromosphere are known as solar prominences. These are large, bright features that rise above the solar limb and are anchored to the Sun's surface by magnetic fields. Prominences consist of dense, cool gas that can extend thousands of kilometers into space and often appear in loop or arch shapes. They are associated with solar activity and can erupt, leading to coronal mass ejections.
None of the above. A crack in the Earth's surface is called a fissure or a fault.
The epicenter of an earthquake is directly above the focus or hypocenter, which is the point where the seismic waves originate within the Earth. It is typically located on the Earth's surface directly vertically above the focus.
When setting up a straight or extension ladder, the top of the ladder should extend at least 3 feet above the support point. This extension provides extra stability and ensures safe access to the working area. Additionally, it helps prevent the ladder from slipping off the edge.
When using an extension ladder, it should extend at least 3 feet above the walking surface to provide adequate support and safety for the user. This ensures that the ladder provides a stable handhold for entering or exiting the working area. Always ensure that the ladder is positioned at the correct angle and secured properly before use.
1 metres
From the US OSHA Construction standards:1926.1053(b)(1)When portable ladders are used for access to an upper landing surface, the ladder side rails shall extend at least 3 feet (.9 m) above the upper landing surface to which the ladder is used to gain access; or, when such an extension is not possible because of the ladder's length, then the ladder shall be secured at its top to a rigid support that will not deflect, and a grasping device, such as a grabrail, shall be provided to assist employees in mounting and dismounting the ladder. In no case shall the extension be such that ladder deflection under a load would, by itself, cause the ladder to slip off its support.
To safely access the roof using a ladder extension, make sure the ladder is long enough to reach the roof and is securely placed on a stable surface. Extend the ladder at least 3 feet above the roof edge for stability. Use proper ladder safety techniques, such as maintaining three points of contact and facing the ladder while climbing. Have someone hold the ladder at the base for added stability.
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30 feet above sea level and 50 feet above earths surface... science homework these days
30 feet above sea level and 50 feet above earths surface... science homework these days
To safely climb a ladder to access your roof, make sure the ladder is on a stable surface and is at the correct angle (about 75 degrees). Always face the ladder and use three points of contact (two hands and one foot or two feet and one hand) while climbing. Do not lean too far to the side and avoid carrying heavy items while climbing. Use a ladder that is tall enough to extend at least 3 feet above the roof edge for easy access.
Assuming it is a two section ladder then it must therefore have a minimum length of 28 feet.
The troposphere extends approximately 7-17 kilometers (4-10 miles) above the Earth's surface, depending on the location and season.
The stratosphere's upper limit is about 20 miles above sea level.