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3 years ago

What is an earthquake?

1 answer:

6 0

An earthquake is when two tectonic plate merge and one snaps up suddenly, causing the plate to shake violently until it settles back into place. hope i helped :3

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Since the moon orbits the earth approximately every 27 days, there is a lunar eclipse approximately every 27 days.

Dahasolnce [82]

Answer:

No ! its False

Explanation:

We all know , we dont have lunar eclipse in every 27 days . They do not happen every month because the Earth's orbit around the sun is not in the same plane as the Moon's orbit around the Earth.

5 0

3 years ago

A 105 kg astronaut carrying a 16 kg tool bag finds himself separated from his spaceship by 18 m and moving away from the spacesh

Ratling [72]

Answer:

$T=22.5sec$

Explanation:

From the question we are told that:

Mass of astronaut $m_a=105kg$

Mass of tool $m_t=16kg$

Distance $d=18m$

Velocity of separation $v_s= 0.1m/s$

Velocity of tool bag $v_t=4.5m/s$

Generally the equation for momentum is mathematically given by

$P=mv$

Therefore

Initial Momentum before drop

$P_1=0.1(105+16)$

$P_1=12.1$

Initial Momentum after drop

$P_2=-16(4.5)+105V$

Therefore

Since $P_1=P_2$

$-72+105V=12.1$

$V=0.8m/s$

Generally the equation for Time T is mathematically given by

$T=\frac{d}{V}$

$T=\frac{18}{0.8}$

$T=22.5sec$

3 0

3 years ago

A pendulum of mass 5.0 ???????? hangs in equilibrium. A frustrated student walks up to it and kicks the bob with a horizontal fo

Rudiy27

Answer:

a. 37.75°

b. 6.21 m

Explanation:

a. The horizontal force acting on a pendulum bob is given as:

F = mgsinθ

where m = mass of bob

g = acceleration due to gravity

θ = angle string makes with the vertical or angle of displacement

Making θ subject of formula, we have:

θ = $sin^{-1}(\frac{F}{mg} )$

θ = $sin^{-1} (\frac{30}{5*9.8})$

θ = 37.75°

The maximum angle of displacement is 37.75°

b. Period of a pendulum is given as:

$T = 2\pi\sqrt{ \frac{L}{g} }$

where L = length of string

Therefore, making L subject of formula:

$L = \frac{gT^2}{4\pi^2}$

$L = \frac{9.8 * 5^2}{4\pi^2} \\\\\\L = 6.21 m$

The string holding the pendulum has to be 6.21 m long.

4 0

3 years ago

Newton's _____law states that when one object exerts a force on a second object, the second object always exerts a force back on

Nina [5.8K]

<h2>Answer:Third</h2>

Explanation:

Newton's third law states that every action force has a equal and opposite reaction force.

Example 1:

Consider yourself hitting a wall with your hand,you are exerting a force on the wall but still you feel hurt because the wall exerts same force on your hand in opposite reaction.

Example 2:

Consider yourself standing on ground.You are exerting force on ground.But how are you able to stand on ground even if your mass is forcing you to go down?The answer is normal reaction force.The ground exerts a force on your feet which makes you to stand still.

3 0

3 years ago

What feelings do learned helplessness and depression have in common?

8_murik_8 [283]

Answer:

Learned helplessness can have a profound impact on mental health and well-being. People who experience learned helplessness are also likely to experience symptoms of depression, elevated stress levels, and less motivation to take care of their physical health. Not everyone responds to experiences the same way.

Explanation:

Brainlist will be very accepted ;D *wink*

6 0

3 years ago