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3 years ago

Hideki is having trouble completing long workouts. What does he need to improve?

Physics

1 answer:

KonstantinChe [14]3 years ago

3 0

He needs to improve his endurance time.

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At the focal point of a converging lens, the object:

rewona [7]

Answer:

D) Image cannot be seen

Explanation:

As we know by lens formula

$\frac{1}{d_i} + \frac{1}{d_o} = \frac{1}{f}$

now we know that

object is placed at the focal point of lens

$d_o = f$

so we will have

$\frac{1}{d_i} = 0$

so the image will form at infinite

so image will be at infinite distance from the lens

so it cannot be seen

8 0

4 years ago

Read 2 more answers

If a boy weighs 490 N and stands on a flat rough surface with a

OleMash [197]

The force of static friction acting on the boy is 333 Newtons.

Hence, option (d) 333N is the correct answer.

Given the data in the question;

Weight of boy; $F_n = 490N$

Coefficient of static friction; $u_s = 0.68$

Force of static friction acting on the boy; $F_s = \ ?$

<h3>Friction</h3>

Friction is simply referred as the resistance an object experience when moving or trying to move over another object. It can either by dynamic or static.

Static friction is the resistance experienced by a body at rest.

Coefficient of friction is the measure of how easily a body moves in relation to the other.

Static friction is expressed as;

$F_s = u_s * F_n$

Where $F_s$ is the normal force and $u_s$ is the coefficient of static friction.

We substitute our given values into the equation above

$F_s = u_s * F_n\\\\F_s = 0.68 * 490N\\\\F_s = 333.2N\\\\F_s = 333N$

The force of static friction acting on the boy is 333 Newtons.

Hence, option (d) 333N is the correct answer.

Learn more friction: brainly.com/question/17237604

8 0

3 years ago

Why is it difficult to see colors outside at night?

Stella [2.4K]

I choose D. but I'm not sure if it's right yet. Let me know if it was :)

7 0

3 years ago

Poate cineva sa imi rezolve fisa Asta pana Maine?

Firlakuza [10]

Answer:

httfytstuytshysts

Explanation:htrhstrhhstrsstrthrssr

5 0

3 years ago

The largest single publication in the world is the 1112-volume set of British Parliamentary Papers for 1968 through 1972. The co

Marat540 [252]

Answer:

$m_l=550\ kg$ is the mass of librarian.

Explanation:

Given:

mass of the system, $m_s=3.3\times 10^{3}\ kg$

velocity of librarian relative to the ground, $v_l=2.5\ m.s^{-1}$

velocity of the cart relative to the ground, $v_c=0.5\ m.s^{-1}$

N<u>ow using the principle of elastic collision:</u>

Net momentum of the system is zero.

$m_l\times v_l=(3300-m_l)\times v_c$

$m_l\times 2.5=(3300-m_l)\times 0.5$

$m_l=550\ kg$ is the mass of librarian.

6 0

3 years ago

Read 2 more answers