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juin [17]
3 years ago
7

According to the scientific theory of atoms, which of the following statements

Physics
1 answer:
olga_2 [115]3 years ago
5 0

Answer:

gikjjc hgc  jmjuyv

Explanation:

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2. An example of a force applied against the direction of motion is: A) opening a door B)applying brakes suddenly to a moving ca
Blababa [14]

Answer:

Option(B),option(C) and Option(D) are the correct answer to the given question .

Explanation:

  • In the option(B) if we apply the force to stop the car. The motion and force of car is in the opposite direction .Suppose the person is moving the car to the straight and person immediately apply break the back wheel of the car is stop this means that  force and direction of motion is opposite that's why this is correct .
  • In the  option(C) the ball  and batsman hinting the ball is in the opposite direction .Suppose the ball is coming to the batsman to the right and it hits to the left its a opposite direction Therefore in this the force and direction of motion is opposite that's why this is correct .
  • In the option(D) if the person drawing water from a well there is always upward force is applied but there is always motion is there i.e downward force i,e mg.that's why  force and direction of motion is opposite that's why this is correct .
  • In the option(A) the force of opening the door of force and the motion is in the same direction therefore it is not the against the direction of motion that's why this option is incorrect .
8 0
4 years ago
An athlete stretches a spring an extra 40.0 cm beyond its initial length. how much energy has he transferred to the spring, if t
marissa [1.9K]
The energy transferred to the spring is given by:
U= \frac{1}{2}kx^2
where 
k is the spring constant
x is the elongation of the spring with respect its initial length

Let's convert the data into the SI units:
k=52.9 N/cm = 5290 N/m
x=40.0 cm=0.4 m

so now we can use these data inside the equation ,to find the energy transferred to the spring:
U= \frac{1}{2}kx^2= \frac{1}{2}(5290 N/m)(0.4m)^2=423.2 J
4 0
3 years ago
A person, of weight mg, is standing on a scale in an elevator. What will the
uranmaximum [27]

more than mg

Explanation:

the pressure

7 0
3 years ago
The wavelength of light in a medium is ____ the wavelength of light in a vacuum. Question 10 options: longer than shorter than e
Nookie1986 [14]

Answer:

B

Explanation:

Shorter than is the answer. Correct on the test!

7 0
3 years ago
A mass is attached to the end of a spring and set into oscillation on a horizontal frictionless surface by releasing it from a c
Aneli [31]

Answer

given,

x = (3.9 cm)sin[(9.3 rad/s)πt]

general equation of displacement

x = A sin ω t

A is amplitude

now on comparing

c) Amplitude  =3.9 cm

a) frequency =

     f = \dfrac{\omega}{2\pi}

     f = \dfrac{9.3\pi}{2\pi}

           f = 4.65 Hz

b) period of motion

        T= \dfrac{1}{f}

        T= \dfrac{1}{4.65}

        T = 0.215 s

d) time when displacement is equal to x= 2.6 cm

x = (3.9 cm)sin[(9.3 rad/s)πt]

2.6 = (3.9 cm)sin[(9.3 rad/s)πt]

sin[(9.3 rad/s)πt] = 0.667

9.3 π t = 0.73

t = 0.025 s

4 0
3 years ago
Read 2 more answers
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