Answer:
1176 Nm or J
Explanation:
W = F*d
F = 60kg * 9.8 kgm/s^2 = 588 N
W = 588 N * 2m = 1176 N*m
Answer:
(a) 46.94 J.
(b) 55.95 m/s
Explanation:
(a)
Potential Energy: This is the energy of a body, due to its position. The S.I unit of potential energy is Joules (J).
The formula of potential energy in a stretched spring is
Ep = 1/2ke² .......................... Equation 1
Where Ep = potential energy of the spring, k = Force constant of the spring, e = extension or compression.
Given: k = 425 N/m, e = 0.47 m.
Substitute into equation 1
Ep = 1/2(425×0.47²)
Ep = 46.94 J.
(b)
at the instant When the arrow leaves the bow, the potential energy of the arrow is converted kinetic energy of the bow.
I.e,
Ep = 1/2mv² ............. Equation 2
Where m = mass of the arrow, v = velocity of the arrow.
make v the subject of the equation
v = √(2Ep/m)............. Equation 3
Given: Ep = 46.94 J, m = 0.03 Kg.
Substitute into equation 3
v = √(2×46.96/0.03)
v = √(93.92/0.03)
v = √(3130.67)
v = 55.95 m/s
It is overhead at the equator, it is because the sun ray’s
will be moving vertically as this will be directed at the equator. It is
because if it moves vertically, it will hit or overhead the equator and this
usually happens in spring and fall.
Answer:
The value is 
Explanation:
From the question we are told that
The operating temperature is 
The emissivity is 
The power rating is 
Generally the area is mathematically represented as
Where 
is the Stefan Boltzmann constant with value
So
(1) The image of an object placed further from the lens than the focal point will be upside down and smaller than the object.
(2) When light rays reflect, they bounce back.
(3) Images formed by a concave lens will look magnified.
(4) When light rays enter a different medium, they bend.
<h3>
1.0 Object placed further from the lens than the focal point</h3>
The image of an object placed further from the lens than the focal point will be diminished and inverted.
Thus, the correct answer will be "upside down and smaller than the object".
<h3>2.0 What is reflection of light?</h3>
The ability of light to bounce back when it strike a hard surface is known as refection.
<h3>3.0 Image formed by concave lens</h3>
A concave lens is diverging lens is usually virtual, erect and magnified.
<h3>4.0 Refraction of light</h3>
The change in speed of light when it travels from medium to another medium is known as refraction. Refraction is also, the ability of light to bend around obstacles.
Learn more about reflection and refraction of light here: brainly.com/question/1191238
