Answer:
The question is incomplete because the options are not given. We'll solve this question with the options.
There are two properties of negative charges which we have to consider to find the figure of its electrical field.
Firstly, for a negative charge, the electrical field lines are always directed radially outwards and they don't intersect.
Secondly, we know that similar charges repel each other, so there will be no electrical field present directly between these two negative charges. Electrical field line will be present between two charges only when there is a force of attraction.
Taking both of these facts into consideration, the electrical field line between two negatives is represented by the figure below.
Answer:
Stays the same.
Explanation:
The temperature does not change just because something melts.
First, we must recall that distance is the total length traveled by an object in which the direction of the motion does not matter. Meanwhile, displacement is the distance of the object from its starting point which means the directions matters for displacement.
Now, speed is distance over time while velocity is displacement over time. Since we're talking about the same object's motion, the total time traveled is (120 + 90) = 210 seconds.
Now, the total distance traveled by the object is (400 + 250) = 650 m. Meanwhile the total displacement traveled by the object is 400 m, East + 250 m, West = 150 m, East.
Now, to find the speed and velocity, we just divide the values of distance and displacement, respectively, over time. Thus, we have
speed = 650 m / 210s ≈ 3.095 m/s
velocity = 150 m, East /210 s ≈ 0.714 m/s, East
Now, rounding the values up to 2 significant digits, we have
a) speed = 3.1 m/s
b) velocity = 0.71 m/s, East
Answer:
The power output in horsepower to raise the object is, P = 13.14 Hp
Explanation:
Given data,
The mass of the object, m = 2000 kg
The object is raised to a height, h = 5.0 m
The time duration of the work, t = 10 s
The force acting on the mass,
F = mg
= 2000 x 9.8
19600 N
The work done on the object is,
W = F x h
= 19600 x 5
= 98000 J
The rate of doing work is defined as the power. It is given by the formula,
P = W / t
= 98000 /10
= 9800 Watts
1 Hp = 745.7 Watts
Therefore,
9800 watts = 13.14 Hp
Hence, the power output in horsepower to raise the object is, P = 13.14 Hp
The correct answer is A.
Stress that pushes a mass of rock in opposite directions is called shearing.
When shear stress occurs, the force of the stress pushes some of the crust in different directions. When this happens, a large part of the crust can break off which makes the rock smaller. Shear stress happens more often at plate boundaries and usually occurs when passing plates rub against each other as they move in opposite directions.
The friction of shear stress at the edge of the plate can cause earthquakes.
