All categories

3 years ago

HELP 50 POINTS

Physics

2 answers:

Pie3 years ago

8 0

Answer:

Explanation:

Inga [223]3 years ago

7 0

Answer:

Explanation:

When you pull the string the weight will experience a downward force and come closer to the vertical tube. And the angle between weight and hand through string is decreased so the angular velocity decreases

You might be interested in

Clarissa has a credit card with a limit of $1,000 and pays her balance in full each month. If Clarissa needs a short-term loan,

Aloiza [94]

Answer:

B.she cannot use it because the credit card is not collareral

Explanation:

sorry if am wrong

5 0

3 years ago

What is meant by action and reaction

ElenaW [278]

Answer: action and reaction forces and are the subject of Newton's third law of motion. Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction

Explanation:

8 0

3 years ago

The competitive exclusion principle states that _______.

nikdorinn [45]

<span>The competitive exclusion principle states that when two organisms attempt to fill the same niche, one will exclude the other from the ecosystem. Research partitioning is an adaptive evolution that when species are have similar preys, they compete with each other and one species is deemed to extinct in the process however if two species are of different preys, then they can exist with one another. To exist with one another, organisms belonging to a same species either compete for the resources or divide it amongst themselves. This concept is important because it helps in diversified ecology, where animals and plants of the same species co-exist and creates a beauty with nature.</span>

4 0

4 years ago

Read 2 more answers

Two physics students are standing on skateboards and facing each other. Their masses, including the skateboards, are 95 kg and 5

andrey2020 [161]

Answer:

1) $\sum \vec p=0\ kg.m.s^{-1}$

2) $v_2=55.078\ m.s^{-1}$

Explanation:

Given:

mass of heavier student, $m_1=95\ kg$

mass of lighter student, $m_2=58\ kg$

velocity of the heavier student after the mutual push, $v_1=3.1\ m.s^{-1}$

Since they push each other and we are neglecting any friction that means we can consider this as a perfectly elastic collision. So the momentum of the two bodies will be equal and in opposite direction.

Since momentum is a vector quantity so the total momentum of the system as a whole will be zero.

<u>From the condition of elastic collision:</u>

$p_1=p_2$

$m_1.v_1=m_2.v_2$

$95\times 3.1=58\times v_2$

$v_2=55.078\ m.s^{-1}$

6 0

4 years ago

Which of the following are found within the electromagnetic spectrum? Check all that apply. sound waves visible light X rays ult

sattari [20]

Answer:

Visible light

X rays

ultraviolet radiation

gamma rays

microwave radiation

Explanation:

Electromagnetic waves consist of oscillating electric and magnetic fields which vibrate in a direction perpendicular to the direction of motion of the wave (transverse wave). Electromagnetic waves have all same speed in a vacuum ( $c=3.0\cdot 10^8 m/s$ , known as speed of light) and are classified into 7 different types according to their frequency and wavelength. This classification is called electromagnetic spectrum.

From lowest to highest wavelength, the 7 types are:

Gamma rays

X-rays

Ultraviolet radiation

Visible light

Infrared radiation

Microwaves

Radio waves

Sound waves, on the contrary, do not belong to the electromagnetic spectrum, since they are another type of wave called mechanical waves (which consist of vibrations of the particles in a medium).

8 0

3 years ago