Answer: long handle
Explanation: they are better for tree planting and other hole-digging. Long shovel handles can reach deep into a hole. And you'll get better leverage, which is easier on your back. ... The lighter the shovel, the easier time you will have digging.
Answer: Option B) Power
Explanation:
Power is the rate at which energy is expended per unit time. Hence, the rate at which electric energy is used is simply called electrical power.
Mathematically, the relationship between energy and power is:
Power = (Electrical energy /Time)
Hence, power consumption or electrical energy used in homes is rated in kilowatt per hour (kWh).
The pressure exerted on the stone is
What is pressure?
- The force delivered perpendicularly to an object's surface per unit area across which that force is dispersed is known as pressure (symbol: p or P).
- A scalar quantity, pressure. It connects the normal force operating on the surface and the vector area element, which is normal to the surface. The scalar scale parameter is pressure.
- The pascal (Pa), or one newton per square meter, is the SI unit for pressure.
- A force is an effect that has the power to alter an object's motion. A motion of an object having mass to accelerate when it changes its velocity, for as when it moves away from rest. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both direction and magnitude.
Formula for pressure = Force / area
The required answer is
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Answer:
W = 181.26 J
Explanation:
Given that,
The force acting on the cart, F = 20 N
It is at an angle of 25 degrees above the horizontal to move a crate a distance of 10m across the floor.
We need to find work done by the student. The work done by the student is given by :
So, the required work done is 181.26 J.
When a ray of light passes from one medium to another it changes its path, this phenomenon of light is called the deviation of light.