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worty [1.4K]
4 years ago
13

What is the correct answer?

Physics
2 answers:
AveGali [126]4 years ago
4 0
The last three.......
Elina [12.6K]4 years ago
3 0

Answer:

biking / jogging/ running, walking

Explanation:

Cardio workouts can strengthen your heart and blood vessel

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A line on a speed-time graph with a steep slope indicates a greater speed? true or false
makvit [3.9K]
I think this is false
hope this helps...

5 0
3 years ago
) Force F = − + ( 8.00 N i 6.00 N j ) ( ) acts on a particle with position vector r = + (3.00 m i 4.00 m j ) ( ) . What are (a)
natali 33 [55]

To develop this problem it is necessary to apply the concepts related to the Cross Product of two vectors as well as to obtain the angle through the magnitude of the angles.

The vector product between the Force and the radius allows us to obtain the torque, in this way,

\tau = \vec{F} \times \vec{r}

\tau = (8i+6j)\times(-3i+4j)

\tau = (8*4)(i\times j)+(6*-3)(j\times i)

\tau = 32k +18k

\tau = 50 k

Therefore the torque on the particle about the origen is 50k

PART B) To find the angle between two vectors we apply the definition of the dot product based on the vector quantities, that is,

cos\theta = \frac{r\cdot F}{|\vec{r}|*|\vec{F}|}

cos\theta = \frac{(8*-3)+(4*3)}{\sqrt{(-3)^2+4^2}*\sqrt{8^2+6^2}}

cos\theta = -0.24

\theta = cos^{-1} (-0.24)

\theta = 103.88\°

Therefore the angle between the ratio and the force is 103.88°

5 0
3 years ago
Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view aditional
Sliva [168]

Answer:

A T-chart is used comparing two sides of a topic for example pros and cons or cause and effect. A star diagram is used for organizing the characteristics of a single topic, a central space is used for displaying the topic, with each point showing or listing an attribute about the topic.

5 0
3 years ago
Read 2 more answers
What does it mean when work is positive?
Vedmedyk [2.9K]
<h2>Answer:</h2>

d. An object did work on the environment.

<h2>Explanation:</h2>

Work is defined in many contexts. Some of these are;

i. <em>Work is the product of force and displacement</em>. In this case, work done is positive if the force applied on an object or body and the displacement caused by the force are in the same direction. If instead the force and displacement are in opposite direction, then the work done will be negative. If it is the case the force and the displacement are perpendicular to each other, the work done is zero.

ii. In the first law of thermodynamics, the internal energy of a system is the sum of the work done and the heat exchanged between the system and the environment. Therefore, <em>work done is the difference between the internal energy of a system and the heat exchanged between the system and the environment</em>.

In this case, work is said to be positive if work is done by the system (object) on the environment. It is negative if work is done by the environment on the system (object).

6 0
3 years ago
Read 2 more answers
When placed in water does a pencil bend towards the normal or away from the normal?
Anarel [89]

Answer:

ni sin theta i = nr sin theta r       where theta i is the angle of   incidence     and theta  r the angle of refraction

For nr greater than ni   (air to water) theta r must be smaller and the image would be bent towards the normal

7 0
3 years ago
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