1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
NARA [144]
2 years ago
13

Which of the following statements is true? Like charges attract and unlike charges repel each other. Gravitational forces only e

xist between large masses. On a level surface, normal force is greater than the weight of the object. Applied forces are those created by another object or person.
Physics
1 answer:
ra1l [238]2 years ago
5 0

Answer:

I believe the correct answer to your question is C.) On a level surface, normal force is greater than the weight of the object.

Sidenote:

Also sorry if my answer is wrong, but I do believe this is the correct answer.

I hope you have a great day!

You might be interested in
A mixture of nitrogen and xenon gases, at a total pressure of 836 mm Hg, contains 2.80 grams of nitrogen and 24.9 grams of xenon
larisa86 [58]

Answer: Partial pressure of nitrogen and xenon are 288mmHg and 548 mmHg respectively.

Explanation:

The partial pressure of a gas is given by Raoult's law, which is:

p_A=p_T\times \chi_A

where,

p_A = partial pressure of substance A

p_T = total pressure

\chi_A = mole fraction of substance A

We are given:

m_{N_2}=2.80g

m_{Xe}=24.9g

Mole fraction of a substance is given by:

\chi_A=\frac{n_A}{n_A+n_B}

And,

n_A=\frac{m_A}{M_A}

Mole fraction of nitrogen is given as:

\chi_{N_2}=\frac{\frac{m_{N_2}}{M_{N_2}}}{(\frac{m_{N_2}}{M_{N_2}}+\frac{m_{Xe}}{M_{Xe}})}

Molar mass of N_2 = 28 g/mol

Molar mass of Xe =  g/mol

Putting values in above equation, we get:

\chi_{N_2}=\frac{\frac{2.80}{28}}{\frac{2.80}{28}+\frac{24.9}{131}}

\chi_{N_2}=\frac{0.100}{0.100+0.190}=0.345

To calculate the mole fraction of xenon, we use the equation:

\chi_{Xe}+\chi_{N_2}=1\\\\\chi_{Xe}=1-0.345=0.655

p_{N_2}=836mmHg\times 0.345=288mmHg

p_{Xe}=836mmHg\times 0.655=548mmHg

Thus partial pressure of nitrogen and xenon are 288mmHg and 548 mmHg respectively.

6 0
3 years ago
Which of the following materials used by plants to make food can be found in the air?
Rashid [163]

Answer:

<em><u>number</u></em><em><u> </u></em><em><u>d</u></em>

Explanation:

<em><u>because</u></em><em><u> </u></em><em><u>plant</u></em><em><u> </u></em><em><u>need</u></em><em><u> </u></em><em><u>carbondioxide</u></em>

5 0
1 year ago
Hannah, who has a mass of 65 kg, is riding at 25 m/s in her sports car when she must suddenly swerve off the road to avoid
Annette [7]

Hannah comes to a rest in <em>t</em> = 0.4 s, so her acceleration is

<em>a</em> = (0 - 25 m/s) / (0.4 s) = -62.5 m/s²

(that is, the acceleration points in the direction opposing her movement forward as she brakes)

Then the force exerted on her by the seatbelt has magnitude

<em>F</em> = (65 kg) (62.5 m/s²) = 4062.5 N ≈ 4063 N

7 0
3 years ago
True or false solids possess a greater level of kinetic energy than gases ​
Kipish [7]

Answer:

False

Explanation:

Solid particles have the least amount of energy, and gas particles have the greatest amount of energy. The temperature of a substance is a measure of the average kinetic energy of the particles. A change in phase may occur when the energy of the particles is changed.

8 0
2 years ago
Your environmental science class has collected information on the trash your school throws away. To reduce the amount of trash y
MakcuM [25]
In my school we have recycle bins than store trash, plastic, and paper. Every Friday a group of students in with the responsibilities collect them all together around the school and yeah...
3 0
3 years ago
Other questions:
  • When two waves undergo complete, constructive interference, which of the following increases ?
    14·1 answer
  • What are two real life examples that resemble peristalsis?
    9·1 answer
  • Although all sports require a person to be in shape to some degree, some sports demand more from the body. Which sport does not
    7·2 answers
  • Mary walked north from her home to Sheila's home, which is 4.0 kilometers away. Then she turned right and walked another 3.0 kil
    14·1 answer
  • A spacecraft is traveling in interplanetary space at a constant velocity. What is the estimated distance traveled by the spacecr
    14·2 answers
  • A 3 kg mass object is pushed 0.6 m into a spring with spring constant 210 N/m on a frictionless horizontal surface. Upon release
    14·1 answer
  • Current is the movement of positive charges called electrons.
    12·2 answers
  • This table shows the weights of four different objects that are sitting on the
    6·1 answer
  • 5. Which of the following is NOT a course goal?
    12·1 answer
  • How long does it take a car traveling at 45km/h to travel 100.0 m?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!