PHYSICS HIGH SCHOOL

1. What causes tides?A. The energy generated by waves.
B. The changes in Earth's climate.
C. The gravitational pull of the Sun on Earth's oceans.
D. The gravitational pull of the Moon on Earth's oceans.

Answers

Answer 1
Answer:

Answer:

D.) The gravitational pull of the Moon on Earth's oceans.

Explanation:

A.) is incorrect because waves caused by the moon's gravitational pull. Waves and tides are essentially the same thing.

B.) is incorrect because climate change only has a small, indirect effect on the tides (i.e., rising sea levels).

C.) is incorrect because while the gravitational pull of the Sun affects the tides to some extent, it is nowhere near as influential as the Moon's gravitational pull.

D.) is correct because the gravitational forces between the Moon and the Earth are the primary cause of the tides.
Answer 2
Answer: it is letter d! :).

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How do i write in standard form 20000 degrees celsius?

Answers

These are the possible answers:
2.0000 * 10^4=20000
20.000 * 10^3=20000
200.00 * 10^2=20000

Determine the volume at the equivalence point if a 0.100 M NaOH(aq) solution is used to titrate the following acidic solutions: (a) 50.0 mL of 0.200 M HBr(aq) (b) 30.0 mL of 0.150 M HNO3(aq)

Answers

Answer:

a) NaOH volume at the equivalence point is 100 ml.

b) NaOH volume at the equivalence point is 45 ml.

Explanation:

To calculate the concentration of acid, we use the equation given y neutralization reaction:

n_1M_1V_1=n_2M_2V_2

where,

n_1,M_1\text{ and }V_1 are the n-factor, molarity and volume of acid.

n_2,M_2\text{ and }V_2 are the n-factor, molarity and volume of base

a) If a 0.100 M NaOH (aq) solution is used to titrated with 50.0 mL of 0.200 M HBr(aq).

We are given:

n_1=1\nM_1=0.200M\nV_1=50.0mL\nn_2=1\nM_2=0.100M\nV_2=?mL

Putting values in above equation, we get:

1* 0.200M* 50.0 mL=1* 0.100 M* V_2\n\nV_2=100 mL

b) If a 0.100 M NaOH (aq) solution is used to titrated with 30.0 mL of 0.150 M HNO_3(aq).

We are given:

n_1=1\nM_1=0.150M\nV_1=30.0mL\nn_2=1\nM_2=0.100M\nV_2=?mL

Putting values in above equation, we get:

1* 0.150M* 30.0 mL=1* 0.100 M* V_2\n\nV_2=45 mL

Using information about natural laws, explain why some car crashes produce minor injuries and others produce catastrophic injuries.

Answers

The larger the mass and the speed, the larger the force it would produce if it crashes something. Some car crashes produce minor injuries because maybe this car is small and runs at very slow speed which would mean less force when in impact with another. However, if a big truck crashes, it is expected to produce a larger force causing catastrophic injuries.

The car crash in which the car is moving at higher speed will cause catastrophic injuries whereas the car moving at smaller speed will cause minor injuries. This is due to the law of inertia of the bodies.

Explanation:

The inertia of a body is defined as the resistance of the body towards any change in its current state of rest or motion. The body does not want to change its state and this resistance of the body is directly proportional to the mass of the body.

According to the law of inertia, a body continues to be in its state of rest or motion until and unless an external force acts on the body.

A car moving at a higher speed and having a higher mass is considered to have higher inertia of motion and therefore when it crashes, it experiences a very high stopping force and due to this, the injuries caused in the car crash will be very catastrophic.

Whereas, if the same car is moving at a lower speed, the inertia of motion of the car will be less and when this car crashes, it will experience a smaller force and comes to rest. Due to this, the injuries caused in the crash will be minor.

Thus, The car crash in which the car is moving at higher speed will cause catastrophic injuries whereas the car moving at smaller speed will cause minor injuries. This is due to the law of inertia of the bodies.

Learn More:

1. Which one remains constant in uniform circular motion brainly.com/question/2562955

2. The unit of the gravitational constant brainly.com/question/1724648

3. The x-component of the given vector brainly.com/question/2562517

Answer Details:

Grade: High School

Subject: Physics

Chapter: Laws of motion

Keywords:

natural laws, law of inertia, mass, speed, car crash, minor injuries, catastrophic, bodies, rest or motion, state, inertia of motion.

A cart rolling down an incline for 5.0 seconds has an acceleration of 4.0 m/s .If the cart has an initial speed of of 2.0 m/s ,what's its final speed.

Answers

A cart rolling down an incline for 5.0 seconds has an acceleration of 4.0 m/s .If the cart has an initial speed of of 2.0 m/s and its final speed is calculated as 22m/s.

Given data is,

Time t = 5 seconds

Acceleration  a = 4 m/s

Initial speed u = 2 m/s.

What is velocity?

Velocity is defined as the rate of change of object's position with some function of time.

Mathematically, Velocity can be defined by the ratio of distance and time.

Velocity = Distance/ time.

The velocity after a certain time of acceleration can be described with the formula as,

V = u + at

where, v is the final velocity,

u is the initial velocity,

a is the acceleration,

t is the time.

Substituting all the given values in the formula,

V = 2 + ( 4x5)

  = 2 + 20

V = 22m/s

The final velocity of a cart rolling down can be calculated as 22 m/s.

To know more about the velocity,

brainly.com/question/13867834

#SPJ5

Answer: solve it with the following formula:

Vf = Vi + at

Final velocity = initial velocity + ( acceleration × time)

Explanation:

Putting the values

Vf = 2.0m/s+ 4.0m/s²× 5.0s

Vf = 2.0m/s +20.0 m/s (m/s² × s = m/s)

Vf = 22.0 m/s

Which of the following is not one of da Vinci's contributions to technology?a. effect of the moon on tides
b. modern theory on the formations of the continents
c. precise observations of human anatomy
d. ideas for space travel

Answers

Answer: Option d: ideas of space travel.

Explanation:

Leonardo da Vinci was an Italian. He had numerous skills in various different fields. Leonardo contributed to technology for the effect of moon on the tides,  his theory on formation of continents, human anatomy, art and much more. But he did not contribute in the ideas for space travel. Hence, the correct option is d.

Answer:D

Explanation:

What is refractive index?

Answers

The refractive index of a substance is the ratio . . .

           (speed of light in vacuum) divided by (speed of light in the substance) .


So the speed of light in a substance is

           (299,792,458 meters per sec) divided by (the refractive index of the substance).
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