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
wel
3 years ago
9

What is the mass of an object if a net force of 18 N causes it to accelerate at 15 m/s^2?

Physics
2 answers:
sveticcg [70]3 years ago
6 0
Sure the answer is 1.2kg... by using F=ma then making m the subject so.. F/a=m then 18/15=1.2 and the unit is kg so.. 1.2kg
trasher [3.6K]3 years ago
3 0

Answer:

1.2 kg

Explanation:

F = 18N

a = 15 m/s^2

F = ma

18 = 15m

m = 1.2 kg

You might be interested in
When resistors are connected in series, we can be certain that:______
Debora [2.8K]

Answer:

A) the same current flows in each one.

Explanation:

When resistors are connected in series, Ohm's law states that the current flowing through each resistor is the same. Since it is similar to Ohm's law for a single resistor, except that the series resistors appear as a sum. Then, the total resistance of a series circuit is equal to the sum of the individual resistors.

7 0
3 years ago
A catapult fires a 0.015kg stone at 70m/s.The spring constant of the catapult is 150N/M. Find the exrtention of the catapult.
adelina 88 [10]

Answer:

0.495m

Explanation:

The kinetic energy of the stone will be equal to the work done by the spring

Mathematically;

W = KE

1/2ke² = 1/2mv²

ke² = mv²

k is the spring constant = 150N/m

e is the extension

m is the mass = 0.015kg

v is the velocity = 70m/s

Substitute

150e² = 1/2 * 0.015 * 70²

150e² = 36.75

e² = 36.75/150

e² =  0.245

e = √0.245

e = 0.495m

Hence the extension of the catapult is 0.495m

7 0
3 years ago
How can a heat pump warm a house by causing a refrigerant to evaporate and condense
sveta [45]
The hot discharge gas from the refrigerant compressor is normally cooled and condensed at high pressure. This is then passed through an 'Expansion' valve which decreases the pressure to a low level causing expansion of the refrigerant liquid. 
<span>The liquid partially vapourises causing a 'Joule's/Thompson' refrigeration effect' which decreases temperature of the refrigerant which then passes to an evaporator coil in the air circulation system of the building. </span>
<span>In the evaporator coil, the heat exchange between the cold refrigerant and the warm air of the building, vaporises and heats the refrigerant which returns to the compressor. </span>
<span>The cycle is repeated until the air temperature reaches the thermostat set-point and switches off the system. </span>

<span>As a Heat pump, the hot refrigerant gas is not evaporating and condensing. </span>
<span>From the compressor discharge, the hot gas is by-passing the cooler/condenser unit and the expansion valve and passes directly to the 'evaporator' coils but now, as the heating medium for the air circulation system where it's cooled by the heat exchange between the hot gas and the cooler air in the building and returns to the compressor in a continuous cycle. </span>

<span>A Thermostat in the system starts and stops the compressor motor according to the heat or cool temperature settings.</span>
4 0
2 years ago
A woman steps in front of a child to keep him from running off. which term best describes this example? negative work positive w
lana [24]

Answer:

negative force

Explanation:

Here woman is applying the force to stop the child or to prevent him from running.

Here we know that the force applied by the woman is opposite to the motion of child but here the child is not displaced by this applied force but the child is only prevented his running.

So here the work done by the woman is zero as there is no displacement by this force.

But here we can say that the the force of woman is against the motion of child so here this force is opposite force and hence it is termed as negative force here.

so correct answer will be

negative force

4 0
3 years ago
Read 2 more answers
Airbags and safety belts can reduce injuries because they can
pashok25 [27]

Answer:

reduce the velocity of collision

5 0
2 years ago
Other questions:
  • Which of these statements expresses a key assumption in our most successful models for galaxy formation?
    11·1 answer
  • A 400-turn circular coil (radius = 1.0 cm) is oriented with its plane perpendicular to a uniform magnetic field which has a magn
    10·1 answer
  • The amount Of Kinetic energy an object has depends on its?
    8·2 answers
  • Identify the position where the cyclist has maximum kinetic energy.
    12·2 answers
  • How do you communicate better
    9·1 answer
  • A gas is compressed from an initial volume of 5.65 L to a final volume of 1.24 L by an external pressure of 1.00 atm. During the
    15·1 answer
  • What are the 2 main parts of physical science
    15·1 answer
  • What is the final step in the fourth stage of technological design, after a product has been improved and approved?
    7·1 answer
  • PART A) The acceleration of gravity is 9.8 m/s^2 What is the magnitude of the net force on a(n) 82 kg driver operating a dragste
    10·1 answer
  • The expression of x=4t+2t^2 Where x is distance and t=time What is displecement ?​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!