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
artcher [175]
3 years ago
6

An earthquake causes a 3 kg book to fall from a shelf. If the book lands with

Physics
1 answer:
Anna [14]3 years ago
7 0
The correct answer is C
You might be interested in
The net force acting on the ball below is ___ N
yKpoI14uk [10]

The net force applied to the object equals the mass of the object multiplied by the amount of its acceleration." The net force acting on the soccer ball is equal to the mass of the soccer ball multiplied by its change in velocity each second (its acceleration).

8 0
3 years ago
A pendulum consists of a stone with mass m swinging on a string of length L and negligible mass. The stone has a speed of v0 whe
Tcecarenko [31]

Answer:

m

Explanation:

6 0
3 years ago
Calculate the change in internal energy of the following system: A balloon is cooled by removing 0.659 kJ of heat. It shrinks on
bixtya [17]
<h2>Answer:</h2>

-310J

<h2>Explanation:</h2>

The change in internal energy (ΔE) of a system is the sum of the heat (Q) and work (W) done on or by the system. i.e

ΔE = Q + W       ----------------------(i)

If heat is released by the system, Q is negative. Else it is positive.

If work is done on the system, W is positive. Else it is negative.

<em>In this case, the system is the balloon and;</em>

Q = -0.659kJ = -695J    [Q is negative because heat is removed from the system(balloon)]

W = +385J  [W is positive because work is done on the system (balloon)]

<em>Substitute these values into equation (i) as follows;</em>

ΔE = -695 + 385

ΔE = -310J

Therefore, the change in internal energy is -310J

<em>PS: The negative value indicates that the system(balloon) has lost energy to its surrounding, thereby making the process exothermic.</em>

<em />

<em />

5 0
3 years ago
Describe newtons first law
Tanya [424]
It’s states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.
3 0
3 years ago
Read 2 more answers
If a spring is stretched 4m from its starting length when 20n of force is applied, then how much work (in joules) is done by the
lys-0071 [83]

ANSWER:

250 J

STEP-BY-STEP EXPLANATION:

F = 20N is required to stretch the spring by 4 meters

We know that the force is equal to:

F=k\cdot x

We solve for k (spring constant):

k=\frac{F}{x}=\frac{20}{4}=5\text{ N/m}

The work done in stretching the spring is given by the following equation (in this case the stretch is 10 meters:

\begin{gathered} W=\frac{1}{2}k\cdot x^2 \\ \text{ Replacing} \\ W=\frac{1}{2}\cdot5\cdot10^2 \\ W=250\text{ J} \end{gathered}

The work required is 250 joules.

5 0
1 year ago
Other questions:
  • Which is the symbol for gold?
    11·2 answers
  • Two different objects are 3 meters from the reference point on a graph and share the same y-coordinate.
    5·1 answer
  • Newspapers used as covers to keep out the cold were called _________.
    7·1 answer
  • Which shows the correct order of processes leading up to the formation of a main sequence star?
    8·2 answers
  • 17. What are the two factors that can cause the volume of water in the ocean to change? A. Temperature and pressure B. Gravity a
    15·1 answer
  • An object in a fluid experiences a buoyant force from the fluid. If the object is completely immersed, on which does the magnitu
    15·1 answer
  • 4. For a point charge, we derived an expression from Gauss’s law for the electric field a distance r away. You have a point char
    10·1 answer
  • What are the two outcomes for a proto star?
    11·1 answer
  • You push a cart with mass 30 kg forward, giving it an acceleration of 5 m/s2How much force did you apply? O A. 0.17 N O B. 35 N
    10·1 answer
  • A copper calorimeter of mass 120g contains 70g of water and 10g of ice at 0°C. What mass of steam at 100°C must be passed into t
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!