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
guapka [62]
3 years ago
11

How much energy to be removed to drop the temperature of 5.7kg of wood from 20degrees to 7degrees. #100points

Physics
2 answers:
Neporo4naja [7]3 years ago
5 0

see i was trying to figure out the answer but i didn't understand it so i took the time to research and work it out but i still didn't understand i found one that was close to it and i got the same one as the other person which is D but idk if it is that type of question if it is than it is d if not then idk

WITCHER [35]3 years ago
5 0

Answer:

D is correct they were correct

Explanation:

You might be interested in
If we have less power, we most likely have
katrin [286]
<span>the same amount of work being done over a longer period of time.</span>
3 0
3 years ago
Read 2 more answers
Suppose you throw a baseball downward from a roof so that it initially has 120 J of gravitational potential energy, and 10 J of
Volgvan

Answer:

B.

It will be greater than 10 J.

Explanation:

The total mechanical energy of an object is the sum of its potential energy (PE) and its kinetic energy (KE):

E = PE + KE

According to the law of conservation of energy, when there are no frictional forces on an object, its mechanical energy is conserved.

The potential energy PE is the energy due to the position of the object: the highest the object above the ground, the highest its PE.

The kinetic energy KE is the energy due to the motion of the object: the highest its speed, the largest its KE.

Here at the beginning, when it is at the top of the roof, the baseball has:

PE = 120 J

KE = 10 J

So the total energy is

E = 120 + 10 = 130 J

As the ball falls down, its potential energy decreases, since its height decreases; as a result, since the total energy must remain constant, its kinetic energy increases (as its speed increases).

Therefore, when the ball reaches the ground, its kinetic energy must be greater than 10 J.

7 0
3 years ago
Read 2 more answers
How do the Sun, Earth, and Moon systems interact
Nataly [62]

The sun is the mother star of the solar system, which only emits light to half of the planet, while the other part is always dark.

The sun emits light towards the earth, which dominates all life on earth. The movements of the Moon around the Earth and of the Earth around the Sun are complex. Movements of rotation around their own axes are superimposed on movements of orbital translation. The Earth and the Moon rotate around their own axes: This is rotation.

8 0
2 years ago
A student measures the speed of a rolling ball three times. She adds the measurements and divides by 3. What quantity did the st
Lapatulllka [165]
They calculated the mean value
7 0
4 years ago
Read 2 more answers
P6: An object of mass m sits on a spring of constant k in an elevator that is accelerating upwards with acceleration a. a) In te
tankabanditka [31]

Answer:

(a). The spring compressed is \dfrac{ma+mg}{k}.

(b). The acceleration is 1.5 g.

Explanation:

Given that,

Acceleration = a

mass = m

spring constant = k

(a). We need to calculate the spring compressed

Using balance equation

kx-mg=ma

x=\dfrac{ma+mg}{k}....(I)

The spring compressed is \dfrac{ma+mg}{k}.

(b). If the compression is 2.5 times larger than it is when the mass sits in a still elevator,

The compression is given by

x=2.5\times x_{0}

Here, acceleration is zero

So, x=2.5\times\dfrac{mg}{k}

We need to calculate the acceleration

Put the value of x in equation (I)

2.5\times \dfrac{mg}{k}=\dfrac{ma+mg}{k}

2.5\times\dfrac{mg}{k}=\dfrac{m}{k}(a+g)

a=2.5g-g

a=1.5g

Hence, (a). The spring compressed is \dfrac{ma+mg}{k}.

(b). The acceleration is 1.5 g.

8 0
3 years ago
Other questions:
  • What structure on the south african coast has a range of 63 km and releases flashes every 30 seconds?
    9·1 answer
  • A man is pushing a heavy crate up an inclined plane (ramp) into the back of semi trailer. What can the man do to make it easier
    13·2 answers
  • Is the hand grip test an example of an isometric or an isotonic muscle contraction? Explain your reasoning.
    7·1 answer
  • The distance traveled by an ibject divided by thr time it takes to travel that distance is called?
    7·1 answer
  • There are two types of body waves that travel out from the epicenter of an earthquake they have unique characteristics choose ea
    5·1 answer
  • If sound travels at 5600 m/s through a steel rod,what is the wavelength,given a wave frequency of 2480 Hz
    9·1 answer
  • What is threshold of hearing?
    12·1 answer
  • A car traveling 35 km/hr accelerates to a speed of 45 km/hr in .25 hr. What is its acceleration
    9·1 answer
  • By measuring the potential energy of an object relative to the ground, and the object's mass, you can calculate its speed when i
    7·2 answers
  • What is the effect on a field of tall grass when a wave caused by a cool summer breeze passes through the field?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!