Answer:
<h2>135,000 J</h2>
Explanation:
The work done by an object can be found by using the formula
workdone = force × distance
From the question we have
workdone = 900 × 150
We have the final answer as
<h3>135,000 J</h3>
Hope this helps you
Answer:
Efficiency of a machine is how well the machine works and what the machine is capable of doing.
Mechanical advantage=Load/Effort.
720/180=4
The color that is refracted the most has the SHORTER wavelength. The shorter the wavelength,the more it gets refracted.
Answer:
Similarities between magnetic fields and electric fields: ... Magnetic fields are associated with two magnetic poles, north and south, although they are also produced by charges (but moving charges). Like poles repel; unlike poles attract. Electric field points in the direction of the force experienced by a positive charge ...
Explanation:
copied and pasted from google. I copied and pasted your question into google and got this exact answer
Here is another thing from the same website just not shortened:
Similarities between magnetic fields and electric fields:
- Electric fields are produced by two kinds of charges, positive and negative. Magnetic fields are associated with two magnetic poles, north and south, although they are also produced by charges (but moving charges).
- Like poles repel; unlike poles attract
- Electric field points in the direction of the force experienced by a positive charge. Magnetic field points in the direction of the force experienced by a north pole.
Differences between magnetic fields and electric fields:
- Positive and negative charges can exist separately. North and south poles always come together. Single magnetic poles, known as magnetic monopoles, have been proposed theoretically, but a magnetic monopole has never been observed.
- Electric field lines have definite starting and ending points. Magnetic field lines are continuous loops. Outside a magnet the field is directed from the north pole to the south pole. Inside a magnet the field runs from south to north.
Answer:
V = (√2) + 1) m/s
Explanation:
Let the mass and speed of the running student be M and V respectively.
We are told that when he speeds up by 1 m/s, he has the same kinetic energy as his brother.
Thus, his speed at which he mow has the same kinetic energy as his brother is (V + 1) m/s
Now, we are told that the mass of the student is twice as large as that of his brother. Thus, his brother's mass is; M/2
Since kinetic energy is given by the formula K.E = ½mv²
Therefore, since we want to find the original speed of both students and that the initial condition says that the running student had half the kinetic energy of the brother, we now initial condition as;
½MV²= ½(½(M/2)V²) - - - - (eq 1)
Since he has sped up by 1 m/s, and has a kinetic energy now equal to that of his brother, we have;
(½M(V + 1)²) = (½(M/2)V²) - - - - (Eq2)
Dividing eq 1 by eq 2 gives;
V²/(V + 1)²= 1/2
Taking square root of both sides gives;
V/(V + 1) = 1/√2
Cross multiply to give;
(√2)V = V + 1
(√2)V - V = 1
V((√2) - 1) = 1
V = 1/((√2) - 1)
Simplifying this using surfs gives;
V = [1/((√2) - 1)] × ((√2) + 1))/((√2) + 1))
V = ((√2) + 1))/1
V = (√2) + 1) m/s
