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VMariaS [17]
3 years ago
13

Select the correct answer.

Physics
2 answers:
Kamila [148]3 years ago
6 0
I think D ? Is the answer
ASHA 777 [7]3 years ago
3 0
The correct answer is C
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Mrs. Stark weighs 70kg. How much Potential Energy does she have if she stands on the roof of an 80m tall building?
sesenic [268]

70kg

1 earth gravity

80 M of height

---------------------------------

54917.2 Joules of energy

Mrs. Stark has 54,917.2 Joules of energy.

3 0
3 years ago
An erect object is placed on the central axis of a thin lens, further from the lens than the magnitude of its focal length. The
Zolol [24]

Answer:

the image is virtual and erect and the lens divergent; therefore the correct answer is C

Explanation:

In a thin lens the magnification given by

      m = h '/ h = - q / p

where h ’is the height of the image, h is the height of the object, q is the distance to the image and p is the distance to the object.

It indicates that the object is straight and is placed at a distance p> f

analyze the situation tells us that the magnification is positive so the distance to the image must be negative, that is, that the image is on the same side as the object.

Consequently the lens must be divergent

The magnification value is

          0.4 = h ’/ h

          h ’= 0.4 h

therefore the erect images

therefore the image is virtual and erect and the lens divergent; therefore the correct answer is C

4 0
3 years ago
1c. Which of the following is a scalar quantity?
Oksanka [162]

Answer:

Scalar quantity. a)  35 m

Explanation:

Scalars and vectors are the geometrical representation of a physical quantity. Some physical quantities are scalars and others are vectors.

The physical quantities that are fundamental or derived belong to either of these categories.

The basic nature of a scalar is that it is expressed only with the magnitude.

The nature of a vector is that it has a magnitude as well a definite direction.

The basic way to differentiate a physical quantity whether it is a scalar or vector is to look for direction. If it has a direction, then it is a vector quantity or else it is a scalar. It is notable that every physical quantity has a magnitude.

Hence, the scalar quantity in the given list is  a). 35 m

6 0
4 years ago
A woman takes her dog rover for a walk on a leash. She pulls on the leash with a force of 30.0 N at an angle of 29° above the ho
IrinaK [193]

19.8 N force is tending to lift Rover vertically off the ground.

<h3>What is horizontal and vertical component?</h3>

The horizontal velocity component (v_{x}) describes the influence of the velocity in displacing the projectile horizontally. The vertical velocity component (v_{y}) describes the influence of the velocity in displacing the projectile vertically.

According to the question,

The women pulls the dog with a force of 30 N at an angle of  29° from the horizontal.

Horizontal component=  30cos(29°) = 22.2 N

Vertical component = 30sin(29°) = 19.8 N

Therefore,

The horizontal component would tend to make the dog move forward and the vertical component would tend lift it off the ground.

Hence,

19.8 N force is tending to lift Rover vertically off the ground.

Learn more about horizontal and vertical component here:

brainly.com/question/11776718

#SPJ1

4 0
2 years ago
"The White Shark" allows riders to start from rest on a tube and then slide down a 44 meter slide. It takes the rider 6.2 second
Leni [432]
<span>Acceleration is the rate of change of the velocity of an object that is moving. This value is a result of all the forces that is acting on an object which is described by Newton's second law of motion. Calculations of such is straightforward, if we are given the final velocity, the initial velocity and the total time interval. However, we are not given these values. We are only left by using the kinematic equation expressed as:

d = v0t + at^2/2

We cancel the term with v0 since it is initially at rest,

d = at^2/2
44 = a(6.2)^2/2
a = 2.3 m/s^2



 </span>
6 0
3 years ago
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