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
Sever21 [200]
3 years ago
15

(NO LINKS) A carpenter strikes a nail with a hammer, pushing it into wood.

Physics
1 answer:
Andrej [43]3 years ago
6 0

Answer:

D, Im not very sure about this but I would say D

Explanation:

I tried

You might be interested in
When you speak or sing, you force air through your ?
zaharov [31]
You force air from your lungs up through your larynx which is commonly called the voicebox
6 0
4 years ago
A spaceship ferrying workers to moon Base i takes a straight-line pat from the earth to the moon, a distance of 384,000km, Suppo
GrogVix [38]

Answer:

95.78125%

18000 m/s

22233.33 seconds

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration

v=u+at\\\Rightarrow v=0+20\times 15\times 60\\\Rightarrow v=18000\ m/s

The velocity of the rocket at the end of the first 15 minutes is 18000 m/s which is the maximum speed of the rocket in the complete journey.

Distance traveled while speeding up

s=ut+\dfrac{1}{2}at^2\\\Rightarrow s=0\times t+\dfrac{1}{2}\times 20\times 900^2\\\Rightarrow s=8100000\ m

Distance traveled while slowing down

s=18000\times 900+\dfrac{1}{2}\times -20\times 900^2\\\Rightarrow s=8100000\ m

Distance traveled during constant speed

384000000-(2\times 8100000)=367800000\ m

Fraction

\dfrac{367800000}{384000000}\times 100=95.78125\ \%

Fraction of the total distance is traveled at constant speed is 95.78125%

Time taken at constant speed

t=\dfrac{367800000}{18000}=20433.33\ s

Total time taken is 900+20433.33+900=22233.33\ s

6 0
3 years ago
Tranh slowed his skateboard as he
ICE Princess25 [194]

Answer:

Explanation:

Given parameters:

Initial velocity  = 8m/s

Final velocity  = 2m/s

Time taken  = 3seconds

Unknown and solution:

1. Is he accelerating or decelerating?

Tranh is obviously decelerating in this period. This is negative form of acceleration in which the speed reduces as the body comes to a stop.

Deceleration is a negative change in velocity with time i.e a body is reducing its velocity as time is changing.

2. What is the value?

 Mathematically;

          Deceleration  = \frac{Final velocity  - initial velocity}{time taken}

         Deceleration  = \frac{2 -8}{3}

                                  = -2m/s²

3 0
3 years ago
What is the period of the kinetic or the potential energy change if the period of position change of an object attached to a spr
mylen [45]

Answer: 2.2 s

Explanation:

This is a simple harmonic motion problem. A simple Harmonic motion can be defined as special type of periodic oscillation where the restoring force is directly proportional to the displacement. The restoring force then acts in the direction opposite to the displacement.

All simple harmonic motion is sinusoidal.

PERIOD is the time required to complete a full cycle.

From the question, the period of position change of an object attached to a spring is 4.4 s. There are two potential energy and two kinetic energy maxima per period, therefore, we have 4.4/2 = 2.2 s.

3 0
3 years ago
Which Lewis dot diagram shows an atom that needs 2 more electrons in its outermost shell?
sergiy2304 [10]

Answer: Option (c) is the correct answer.

Explanation:

Atomic number of hydrogen is 1 and one dot in its lewis structure displays only one electron. So, in order to complete its octet it needs one more electron.

Atomic number of carbon is 6 and its electronic distribution is 2, 4. Carbon needs 4 more electrons in order to complete its octet.

Atomic number of oxygen is 8 and its electronic distribution is 2, 6. In order to complete octet, oxygen needs 2 more electrons.

Atomic number of fluorine is 9 and its electronic distribution is 2, 7. In order to complete octet, fluorine needs 1 more electron.

Hence, we can conclude that out of the given options, lewis dot structure of oxygen atom needs 2 more electrons in its outermost shell.

8 0
4 years ago
Read 2 more answers
Other questions:
  • What is the kinetic energy of a 55 kilogram skier traveling at meters per second
    6·1 answer
  • Assume that a cloud consists of tiny water droplets suspended (uniformly distributed,
    13·1 answer
  • A man stands on the roof of a building of height 13.0and throws a rock with a velocity of magnitude 30.0 at an angle of 34.9 abo
    8·1 answer
  • Which of the following is not an experimental science
    15·1 answer
  • Compounds formed from the attraction of oppositely charged ions are called
    14·1 answer
  • Which of the following describes pressure in a fluid ?
    6·1 answer
  • The stair stepper is a novel exercise machine that attempts to reproduce the work done against gravity by walking up stairs. Wit
    7·1 answer
  • If 56.5 m3 of a gas are collected at a pressure of 455 mm Hg, what volume will the gas occupy if the pressure is changed to 632
    13·1 answer
  • PLS HELP 30 POINTS IF U HELP
    11·2 answers
  • The graphs display velocity data. Velocity is on the y-axis (m/s), while time is on the x-axis (s). Based on the graphs,
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!