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
zzz [600]
3 years ago
7

How much work would be required to lift a 12.0 kg mass up onto a table 1.15 meters high

Physics
1 answer:
astra-53 [7]3 years ago
8 0
Work = change of PE
PE = mgh 
Work = 12 kg * 10 * 1.15 m = 135 J 
You might be interested in
An astronaut is traveling in a space vehicle that has a speed of 0.480c relative to Earth. The astronaut measures his pulse rate
Alexxandr [17]

Explanation:

The heart rate of the astronaut is 78.5 beats per minute, which means that the time between heart beats is 0.0127 min. This will be the time t measured by the moving observer. The time t' measured by the stationary Earth-based observer is given by

t' = \dfrac{t}{\sqrt{1 - \left(\dfrac{v^2}{c^2}\right)}}

a) If the astronaut is moving at 0.480c, the time t' is

t' = \dfrac{0.0127\:\text{min}}{\sqrt{1 - \left(\dfrac{0.2304c^2}{c^2}\right)}}

\:\:\:\:=0.0145\:\text{min}

This means that time between his heart beats as measured by Earth-based observer is 0.0145 min, which is equivalent to 69.1 beats per minute.

b) At v = 0.940c, the time t' is

t' = \dfrac{0.0127\:\text{min}}{\sqrt{1 - \left(\dfrac{0.8836c^2}{c^2}\right)}}

\:\:\:\:=0.0372\:\text{min}

So at this speed, the astronaut's heart rate is 1/(0.0372 min) or 26.9 beats per minute.

8 0
3 years ago
A car is moving at 14 m/s. After 30 s, its speed inncreased to 20 m/s. What is the acceleration over time
Juli2301 [7.4K]

Answer:

0.2 m/s^2

Explanation:

initial speed 14m/s

final speed 20m/s

acceleration:

(20m/s - 14m /s) /30s = (6m/s)/30s = 0.2 m/s^2

7 0
2 years ago
The brief wave of positive electrical charge that sweeps down the axon is _____.
kobusy [5.1K]
I believe Action potential is the brief wave of positive charge that sweeps down the axon. Axon is part of the neuron that conducts impulses from the dendrites towards the cell body along the neuron. The action potential is brief since the sodium channels can only stay open for a very brief amount of time. As it travels along the neuron there is a change in polarity across the membrane of the axon .
5 0
3 years ago
Please answer these questions <br> 30 points
Maksim231197 [3]

Answer:

if i were you i would try to do the work because if you let someone else you wont be able to understand the question

6 0
3 years ago
Read 2 more answers
A 6.7kg object moves with a velocity of 8m/s. What's its kinetic energy?
Snezhnost [94]

Given parameters:

Mass of object = 6.7kg

Velocity  = 8m/s

Unknown parameter:

Kinetic energy  = ?

Energy is defined as the ability to do work. There are two forms of energy;

Kinetic and potential energy.

Kinetic energy is the energy due to the motion of a body. Whereas, potential energy is the energy due to the position of a body usually at rest.

Kinetic energy is mathematically expressed as;

             Kinetic energy  = \frac{1}{2} m v^{2}

where m is the mass of the body

           v is the velocity of the body

Since we have been given both mass and velocity, input the parameter to solve for the unknown;

            Kinetic energy  = \frac{1}{2} x 6.7 x 8²   = 214.4‬J

So the kinetic energy of the body is  214.4‬J

3 0
3 years ago
Other questions:
  • the line on the position time graph show the velocites of different vehicles which line represents a vehicle moving at constant
    12·1 answer
  • Which is the direction of in stantaneous velocity for angular path
    15·1 answer
  • What must be the acceleration of a train in order for it to stop from 12m/s in a distance of 541m?
    13·2 answers
  • Which phenomena support only the wave theory of light? Check all that apply.
    9·2 answers
  • When you throw a pebble straight up with initial speed V, it reaches a maximum height H with no air resistance. At what speed sh
    7·1 answer
  • An airplane is flying at a constant velocity through the air. What is the relationship between the magnitudes of the four forces
    12·1 answer
  • If a 230 gram object falls from 2 meters, what is its impulse and velocity upon impact?
    11·1 answer
  • Which term is defined as the ratio of the speed of light in a vacuum to the speed of light in the material it is passing through
    5·1 answer
  • Two identical cars, each traveling at the same velocity, and having the same mass come to a stop
    12·1 answer
  • galatics years. the time the solar system takes to circle around the center of mily way galaxy a galatic year is about 230
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!