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
ycow [4]
4 years ago
12

Plz help!

Physics
1 answer:
Pavlova-9 [17]4 years ago
4 0

The correct answers are:

(1) Force on the object.

(2) 4000 N

Explanations:

(1) According to Newton's second law, force (F) is directly proportional to the acceleration (a) of an object:

F ∝ a

(or F = ma)

As the force (F) on the object increases, the acceleration of that object will also increase. One thing to remember here is that the (net) force must be in the same direction as the acceleration produced by that force to get the maximum increase in the object's acceleration.

Hence, the correct answer is "force on the object."

(2) Again, by using Newton's second law, we can find the net force as follows:

Mass = m = 2000kg

acceleration = a = 2 m/s^2

Since,

F = ma --- (A)

Plug in the values in equation (A):

F = 2000 * 2 = 4000 N

Hence, the correct answer is 4000N.

You might be interested in
Current was discovered not invented​
irina1246 [14]

Answer:

that's true current is discoverd originally by benjimin franklin Followed by tesla and Edison.

Explanation:

3 0
3 years ago
Which statement is true regarding DC current? A. The electrons move back and forth. B. There can only be one voltage supplied. C
Kazeer [188]

Answer:

B

Explanation:

In a DC current, the current supplied is steady motion (a straight horizontal line in a graph) and this is what makes it had to transform. The alternating current takes a sine wave motion in a graph. This means is voltage varies from zero to peak and reverses polarity. The rate at which it achieves this is its frequency in Hertz.

7 0
3 years ago
his is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Air enters a nozzle steadi
zepelin [54]

Answer:

his is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Air enters a nozzle steadily at 2.21 kg/m3 and 40 m/s and leaves at 0.762 kg/m3 and 192 m/s. The inlet area of the nozzle is 90 cm2.

determine (a) the mass flow rate through the nozzle, and (b) the exit area of the nozzle.

a)0.7956kg/s

b)5.437 × 10⁻³m²

Explanation:

The concepts related to the change of mass flow for both entry and exit is applied

The general formula is defined by

\dot{m}=\rho A V

Where,

\dot{m} = mass flow rate\\\rho = Density\\V = Velocity

values are divided by inlet(1) and outlet(2) by

\rho_1 = 2.21kg/m^3V_1 = 40m/s

A_1 = 90*10^{-4}m^2\\\rho_2 = 0.762kg/m^3\\V_2 = 192m/s

PART A) Applying the flow equation

\dot{m} = \rho_1 A_1 V_1\\\dot{m} = (2.21)(90*10^{-4})(40)\\\dot{m} = 0.7956kg/s

PART B) For the exit area we need to arrange the equation in function of Area, that is

A_2 = \frac{\dot{m}}{\rho_2 V_2}\\A_2 = \frac{0.7956}{(0.762)(192)}\\A_2 = 5.437*10^{-3}m^2

7 0
3 years ago
In the final situation below, the 8.0 kg box has been launched with a speed of 10.0 m/s across a frictionless surface. Find the
Murljashka [212]

Answer:

the energy of the spring at the start is 400 J.

Explanation:

Given;

mass of the box, m = 8.0 kg

final speed of the box, v = 10 m/s

Apply the principle of conservation of energy to determine the energy of the spring at the start;

Final Kinetic energy of the box = initial elastic potential energy of the spring

K.E = Ux

¹/₂mv² = Ux

¹/₂ x 8 x 10² = Ux

400 J = Ux

Therefore, the energy of the spring at the start is 400 J.

8 0
3 years ago
Which describes the type of image formed by a plane mirror?
guajiro [1.7K]

Answer:

It is a copy of an object and appears to be coming from behind the mirror.

Explanation:

  1. The plane mirror has a flat surface, where of its surface is polished to reflect the light.
  2. The plane mirror shows the image as the same size of the object.
  3. The image produced by the plane mirror is virtual and erect.
  4. But the orientation of the image formed changes the left and right.
  5. Hence,the image appears to be coming from behind the mirror.
6 0
3 years ago
Read 2 more answers
Other questions:
  • You are given a semiconductor resistor made from silicon with an impurity concentration of resistivity 1.00×10−3ωm. the resistor
    8·1 answer
  • The analysis on a mass basis of an ideal gas mixture at 30°F, 15 lbf/in.2 is 25% CO2, 10% CO, and 65% O2. Determine: (a) the ana
    6·1 answer
  • 0.300 kg baseball just before and just after it collides with a bat. Just before, the ball has velocity of magnitude 12.0 m/s an
    12·1 answer
  • 1. Which statement about subatomic particles is not true?
    6·1 answer
  • 8. The diagram below shows a hot air balloon rising. Propane gas tanks are seen at
    6·1 answer
  • If the intensity of an electromagnetic wave is 80 MW/m2, what is the amplitude of the magnetic field of this wave
    14·1 answer
  • How long will a trip take in hours of you travel 450kmat an average speed of 80 km/hr
    9·1 answer
  • Which term describes a characteristic of the image formed by a plane mirror?
    14·1 answer
  • Which refers to the number of wavelengths that pass a fixed point in a second?
    11·1 answer
  • Select the correct answer. What system prepares the body for the fight-or-flight response in stressful situations? A. somatic ne
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!