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
k0ka [10]
2 years ago
7

The specific heat capacity of copper is 385 J/kg/°C. Calculate the energy needed to increase the temperature of a 4 kg block of

copper from 15°C to 33°C.
Physics
1 answer:
Vesnalui [34]2 years ago
6 0

Answer:

heat energy =mc∆t

Q = 4×385×[33-15]

Q = 4×385×18

Q = 27720joule

You might be interested in
Can someone please help me
guajiro [1.7K]
ANSWER:
C. Small, minimize

Hope it helps u!
5 0
2 years ago
A Universe Question!
vfiekz [6]
I'm pretty sure this is A

4 0
2 years ago
Question 8
spayn [35]

Answer:

500 years so hundreds

Explanation:

google search

5 0
3 years ago
A box is placed on a 30o frictionless incline. What is the acceleration of the box as it slides down the incline
balandron [24]

Answer:

<em>2.78m/s²</em>

Explanation:

Complete question:

<em>A box is placed on a 30° frictionless incline. What is the acceleration of the box as it slides down the incline when the co-efficient of friction is 0.25?</em>

According to Newton's second law of motion:

\sum F_x = ma_x\\F_m - F_f = ma_x\\mgsin\theta - \mu mg cos\theta = ma_x\\gsin\theta - \mu g cos\theta = a_x\\

Where:

\mu is the coefficient of friction

g is the acceleration due to gravity

Fm is the moving force acting on the body

Ff is the frictional force

m is the mass of the box

a is the acceleration'

Given

\theta = 30^0\\\mu = 0.25\\g = 9.8m/s^2

Required

acceleration of the box

Substitute the given parameters into the resulting expression above:

Recall that:

gsin\theta - \mu g cos\theta = a_x\\

9.8sin30 - 0.25(9.8)cos30 = ax

9.8(0.5) - 0.25(9.8)(0.866) = ax

4.9 - 2.1217 = ax

ax = 2.78m/s²

<em>Hence the acceleration of the box as it slides down the incline is 2.78m/s²</em>

5 0
3 years ago
A truck starts off 151 miles directly north from the city of Hartville. It travels due east at a speed of 41 miles per hour. Aft
Bess [88]

Answer:

9.51

Explanation:

The distance s is given by:

s(t) = \sqrt{151^2 + (vt)^2}

The change in distance is given by the time derivative of s:

\frac{ds}{dt} = \frac{v^2t}{\sqrt{151^2 + (vt)^2}}

For the time t you solve the equation of distance x for time:

x = vt => t = \frac{x}{v}

Plugging in for t:

\frac{ds}{dt}(t=\frac{x}{v})=\frac{vx }{\sqrt{151^2 + x^2}}=9.51

6 0
2 years ago
Other questions:
  • The research of social psychologist Vincent Hsu determined that Americans tend to fulfill their ideal of self-reliance through
    14·1 answer
  • The _______ is responsible for determining the frequency of vibration of the air column in the tube within a wind instrument. A.
    6·1 answer
  • At very high pressures, gases become ____________ and will eventually _______________.
    10·1 answer
  • Which of the following is associated with fission but not fusion?
    15·1 answer
  • What is the effect in the picture
    8·1 answer
  • Was the dirty job a chimney maker?<br> TrueOr false.
    15·2 answers
  • What is a rubens tube
    5·1 answer
  • Which property of a substance is not affected by physical changes?
    10·1 answer
  • Models are frequently used in science to assist in the understanding of complex information. Models can include items like a wor
    7·1 answer
  • What is the measure of the energy transformed between two points in an electric circuit is:
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!