Answer: B
Explanation:
5. bending the electric wire a.change in size
b.change in shape
c.change in texture
Answer:
change in shape
hope this will help you
The deep interior of the Earth cannot be mapped using seismic waves . true or false ?
Answer: The answer is false.
A skateboard rolls off a horizontal ledge that is 1.12 m high, and lands
1.48 m from the base of the ledge.
How much time was he in the air?
(Unit = s)
The structure of the NaCl crystal forms reflecting planes 0.541 nm apart. What is the smallest angle, measured from these planes, at which constructive interference of an X-ray beam reflecting off the two planes is observed?
Answer:
[tex]\theta=4.5^{\circ}[/tex]
Explanation:
Given that,
The distance between reflecting planes is 0.541 nm, d = 0.541 nm
Let the wavelength is 0.085 nm
We need to find the smallest angle, measured from these planes, at which constructive interference. Using Bragg's equation to find it as follows :
[tex]m\lambda=2d\sin\theta[/tex]
For smallest angle, m = 1
[tex]\theta=\sin^{-1}(\dfrac{m\lambda}{2d})\\\\\theta=\sin^{-1}(\dfrac{1\times 0.085\ nm }{2\times 0.541\ nm })\\\\\theta=4.5^{\circ}[/tex]
So, the smallest angle is 4.5 degrees.
A a healthy diet and exercise have an impact on the overall health of
the body. While your digestive and respiratory systems seem very
separate in their activities, in reality, the systems work together in
several ways. Which of these correctly pairs a body system with it's
function? All BUT ONE may apply.
Answer:
This would be answer choice A
The digestive system breaks large nutrient molecules into smaller ones that are absorbed into the bloodstream. So, the correct option is A.
What is meant by metabolism ?Metabolism is defined as the mechanism of the body by which the energy is produced from the food we eat, through some chemical reactions.
Here,
The overall proper health of the body is attained through having proper diet and regular exercise. In order to maintain the health, several physiological activities occurs in our body simultaneously.
Metabolism is one of the main physiological mechanism in our body, by which the food we eat is being converted into energy which is necessary for the growth and proper functioning of our body cells and organs.
Digestion is the important process of metabolism.
Digestion is the process by which the large, insoluble food molecules we consume, are broken down into smaller, water-soluble molecules, so that it can be easily absorbed into the blood plasma.
The different steps of digestion are ingestion, propulsion, mechanical digestion, chemical digestion, absorption and defecation.
Hence,
The digestive system breaks large nutrient molecules into smaller ones that are absorbed into the bloodstream.
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Name and draw the circuit symbols for the
two pieces of equipment used to measure
current and voltage.
Answer:
here is the answer its a picture
Explanation:
it is dangerous to stand near the railway leak when train passing by,why?
It is dangerous to stand close to railroad tracks when a rapidly moving commuter train passes. Explain why atmospheric pressure would push you toward the moving train. Water pressure inside a hose nozzle can be less than atmospheric pressure due to the Bernoulli effect.
Pls brainliest!? :)
What is an inexpensive, portable, and common way to assess body fat in the fitness industry?
DEXA
Bioelectrical impedance
Skinfold testing
Hydrostatic weighing
Answer: Skinfold testing
Explanation:
Skinfold testing, is also referred to as calliper testing and it's used to know the body fat percentage. Skinfold testing is an inexpensive, portable, and common way to assess body fat in the fitness industry.
It is typically done with the use of caliper tapes, marker pens which makes it cheap. Skinfold testing isn't usually accurate which is as a result of human errors.
7- A mass initially at O moves 10.0 m to the east and then 5.0 m to the
north. What is the final displacement of the mass?
Answer:
15.0m
Explanation:
10.0+5.0
=15.0m
The diagram shows the top view of a 65-kg student at point A on an amusement park ride. The ride spins the student in a horizontal circle with a radius of 2.5 m, at a constant speed of 8.6 m/s. The floor is lowered and the student remains against the wall without falling to the floor.
The magnitude of the centripetal force acting on the student at point A is approximately
Question 4 options:
1398 N
47 N
223 N
1923 N
Answer:
1923 N
Explanation:
From the question given above, the following data were obtained:
Mass (m) = 65 Kg
Radius (r) = 2.5 m
Velocity (v) = 8.6 m/s
Centripetal force (F) =?
The centripetal force, F, can be obtained by using the following formula:
F = mv²/r
F = 65 × 8.6² / 2.5
F = 65 × 73.96 / 2.5
F = 4807.4 / 2.5
F = 1922.96 ≈ 1923 N
Thus, the magnitude of the centripetal's force acting on the student is approximately 1923 N
A block slides across a flat, horizontal surface to the right. For each choice, the arrows represent velocity vectors of the block at successive intervals of time. Which of the following diagrams represents the situation in which the block loses kinetic energy?
The diagrams the question refers to is in the attachment.
Answer: Third diagram or alternative C.
Explanation: In physics, vector is a representation of magnitude and direction.
Kinetic Energy is energy made by a moving object, i.e., when an object with mass has velocity, it also has Kinetic Energy. It's calculated as:
[tex]K=\frac{1}{2}mv^{2}[/tex]
Vectors below are representing change in velocity during intervals of time.
In the first diagram, vectors doesn't change, so velocity and kinetic energy are constant.
At the second, velocity still constant, however, the "intensity" of the arrow is weaker than the first, which means velocity is less than the first diagram and so is its kinetic energy.
In the fourth diagram, the arrows grow bigger from left to right. This means velocity increases during time. If velocity grows bigger, so does kinetic energy.
In the third diagram, the arrows decrease as it goes to the right: the block's velocity decreases during the successive intervals, which means, kinetic energy diminishes through the interval.
Thus, diagram C represents the situation in which the block loses kinetic energy.
A toy car with an initial velocity of 5 m/s slows to a stop with an acceleration of -1.5 m/s^2.
What is your car's initial velocity?
What is the car's final velocity?
What is the acceleration of the car?
Write the equation you will use to solve this problem.
What is the displacement of the toy car?
4.8 m
8.3 m
16.7 m
21.4 m
Car's Initial velocity (u) = 5 m/s
Car's Final velocity (v) = 0 m/s (Stop)
Acceleration of the car (a) = -1.5 m/s²
Equation used to solve this problem:
[tex] \boxed{ \bf{ {v}^{2} = {u}^{2} + 2as}}[/tex]
By substituting values in the equation, we get:
[tex] \rm \longrightarrow {0}^{2} = {5}^{2} +2 \times ( - 1.5) \times s \\ \\ \rm \longrightarrow 0 = 25 - 3s \\ \\ \rm \longrightarrow 25 - 3s = 0 \\ \\ \rm \longrightarrow 25 - 25 - 3s =0 - 25 \\ \\ \rm \longrightarrow - 3s = - 25 \\ \\ \rm \longrightarrow 3s = 25 \\ \\ \rm \longrightarrow \dfrac{3s}{3} = \dfrac{25}{3} \\ \\ \rm \longrightarrow s = 8.3 \: m[/tex]
[tex] \therefore [/tex] Displacement of the toy car (s) = 8.3 m
Why might a material transmt some waves, while absorbing or reflecting other waves
Answer:
Because the different waves will feel like to bounce off to different directions, and different items will do different actions.
Describe the three times acceleration can happen
Answer:
There are three ways an object can accelerate: a change in velocity, a change in direction, or a change in both velocity and direction.
Explanation:
There are three ways an object can accelerate by a change in velocity, a change in direction, or a change in both velocity and direction.
What is acceleration?Acceleration is given by the ratio of Resultant or total force acting on any object and the its mass.
It can also be defined as the rate change of velocity with time.
acceleration a = (Δv) / (Δt)
The change in velocity will change the acceleration. As, the acceleration is vector quantity, its direction change will also change the acceleration.
And both the change in velocity and direction will have effect on acceleration.
Learn more about acceleration.
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