PHYSICS HIGH SCHOOL

What should you do if you get caught in quicksand

Answers

Answer 1

Answer:

Answer:

-you have to make yourse;f as light as possible so toss your bag, jacket, and shoes.

-Try to take a few steps backwards.

-Keep your arms up and out of the quicksand.

-Try to reach for a branch or person's hand to pull yourself out.

-Take deep breaths.

-Move slowly and deliberately.

Related Questions

What leads to the development of the theory?
What is the main fuel consumed in the core of a red giant?a. H b. C c. Fe d. He
if an object is moving at a constant speed in one direction, what is needed to change its speed or direction?.
A . 2 m/s^2B . 30 m/s^2C . 30 m/s D . 0.5 m/s
Removing the dimensional prefix and express in scientific notation ( include unit)7.4nm6.78 x 10^8 MHz5.36 x 10^6 kV1500mACalculate the following numbers into scientific notation (include units)7800nm + 95pm =2500nm - 7pm =(65x10^4m) x (4.5x10^-6s-1)=(24x10^5m) / (2x10^-8s) =convert the following to the prefix commonly used (use units)55 000 000 Hz4.8x10^4V0.0068s0.00000000234m

Most asteroids lie between the orbits ofa. Jupiter and Saturn.
b. Mars and Jupiter.
c. Jupiter and Neptune.
d. Mars and Earth.

Answers

Most asteroids lie between the orbits of Mars and Jupiter. This certain area is called the asteroid belt. This so-called asteroid belt is inhabited by numerous asteroid, where a lot of collisions do occur. The asteroid belt was formed from the collisions of planetesimals.

Answer:

b. Mars and Jupiter.

Explanation:

Asteroids are irregular sized and shaped rocky bodies -very small as compared to a planet which revolve around the sun in elliptical orbit. In the solar system, majority of the asteroids can be found in the asteroid belt which lies between the orbits of Mars and Jupiter. It is thought to be the debris of an unformed planet due to large gravity of Jupiter. Examples of asteroids - Ceres, Vesta, Eros etc.

"A hole is punched in a full milk carton, 10 cm below the top. What is the initial velocity of outflow?"

Answers

Answer:

The initial velocity of outflow is 1.4 m/s.

Explanation:

As a hole is punched in a full milk carton, and we have to calculate the initial velocity of outflow 10 cm below the top. We use the concept of conservation of energy.

Further Explanation:

Using the conservation of energy, below the top the potential energy converted in kinetic energy

P.E =K.E

$mgh=(1)/(2) mv^(2)$

As mass of milk does not change at the top and 10 cm below the top, therefore

$v=√(2gh)$

Here, v is the initial velocity,

g is acceleration due to gravity

h is height.

Given: h = 10 cm and g = 9.8 m/s2

Substituting the given values, we get

$v=√(2×9.8×0.1m)$

$v=√(1.96)=1.4 m/s$

Lear more:

brainly.com/question/1581227

Key word:

Conservation of energy, Kinetic energy, potential energy.

P 1 = 101,325 Pa (atmospheric pressure)
Milk has almost same density as water: (Rho)= 1,000 kg /m³
P 2 = 101,325 Pa + 1,000 kg/m³ · 9.81 m/s² · 0.1 m = 102,306 Pa
The hydrostatic equation:
P 1 + (Rho)v1² / 2 = P 2 + (Rho)·g·h2
101,325 + 1,000 v1²/2 = 102,306 + 1000 · 9.81 · 0.1
500 v 1² = 102,306 + 981 - 101,325
v 1² = 3.924
v 1 = √ 3.924
v 1 = 1.98 m/s
The initial velocity of outflow is 1.98 m/s.

Which is larger an atom or a molecule

Answers

MOLECULE;
For example, a hydrogen atom forms one bond, an oxygen atom forms two, and carbon forms four bonds. Look at that molecule of water again - each hydrogen has one bond, and the oxygen in the middle has two bonds. Molecules can be much bigger.

Which describes why people on earth can see light from the stars in the sky that are so far away? A.
Light from the stars is visible light and travels in longitudinal waves. Longitudinal waves require a medium to travel; therefore, light is reflected off particles of matter in space to be seen on the earth.

B.
Light from the stars is visible light and travels in electromagnetic waves. Electromagnetic waves require a medium to travel; therefore, light is reflected off particles of matter in space to be seen on the earth.

C.
Light from the stars is visible light and travels in electromagnetic waves. Electromagnetic waves do not require a medium to travel; therefore, light travels through the vacuum of space to be seen on the earth.

D.
Light from the stars is visible light and travels as surface to surface waves. Surface waves require a medium to travel; therefore, light travels from the surface of the star to the surface of the earth.

Answers

Choice-C is a correct statement.

Each of the other choices combines elements of truth
with elements of hogwash.

Which best describes the motion of air particles when a sound wave passes through them? A. The particles move together and apart perpendicular to the direction of the wave. B. Air particles move parallel to the sound waves C. The particles move perpendicular to the direction of the wave. D. The particles move both perpendicular and parallel to the direction of the wave.

Answers

Before solving this question first we have to understand longitudinal wave and transverse wave.

A longitudinal wave is a wave in which the particles of the medium vibrate parallel to the direction of propagation of wave. In this type of wave one will notice compressions and rarefactions. Compressions are high pressure zones where the particles of the medium are close to each other . The rarefactions are low pressure zones where there will be large separation between particles.

A longitudinal wave is a repeated motion of compressions and rarefactions. The particle of the medium show a little displacement along the direction of wave.

A transverse wave is a wave in which the particle vibration is perpendicular to the direction of propagation of wave .In this type of wave one will notice crests and troughs.It is a repeated motion of crests and troughs.

Sound wave is a longitudinal wave. When it passes through air it forms rarefactions and compressions.

Hence from the above we get that out of the four options given in the question only option B is right which depicts that the air particles move parallel to the sound waves.

Sound waves are like waves in the ocean. when there is an earthquake under the water, the waves are created but, they do not move the water. This is because the water is acting as a medium for the energy produced by that earthquake. Because the energy stored in the sound wave needs particles to bounce off of the answer is D.

Which one of the following choices best describes an advantage of isometric exercise? A. Rapid strength improvement
B. Improved strength across the entire range of motion
C. Improved joint flexibility
D. Motivational

Answers

Answer: C. Improved joint flexibility

Explanation:

Isometric exercises are the exercises which involves the contraction of particular muscles or group of muscles. In these exercises the muscles do not change their length and the joints does not move. These are the exercises which are done in one position. These exercises are performed in order to obtain strength during training exercises during which the muscle length and joint angles do not basically change. These exercises are high intensity exercises and contributes to the building of muscles and burning of fat.

On the basis of the above information, A. Rapid strength improvement is the correct option.

Final answer:

The primary advantage of isometric exercise is rapid strength improvement in a specific area, not necessarily improved flexibility or range of motion.

Explanation:

The best answer that describes an advantage of isometric exercise is A. Rapid strength improvement. Isometric exercises are often used for rehabilitation and building strength, as they involve the contraction of a specific set of muscles in a static position. This type of exercise does not involve the muscle changing length or the joint angle changing, which allows for an increase in strength in a very focused manner.

This does not necessarily mean that isometric exercises enhance joint flexibility (C) or improve strength across the entire range of motion (B) as the movement is static. The motivation aspect (D) can differ from person to person, but it's not a direct physical benefit of isometric exercises.