2 years ago

An 800-W heater raises the temperature of 4 kg of soup by 40 °C in 13 minutes.

Physics

1 answer:

Tju [1.3M]2 years ago

6 0

Answer:

Q=0.16*c kJ

Explanation:

Heat transfer and energy changes is related by the equation

Q=mcΔT

where

Q=heat transfer

m=mass of substance

c=specific heat of the material

ΔT= change in temperature

Given

m= 4 kg

c=c

ΔT=40° C

Q=4*c*40

Q=160c

Q=160/1000*c kJ

Q=0.16*c kJ

You might be interested in

Help!!Help!!Help!!Help!!

DerKrebs [107]

Answer:

y=8

Explanation:

every time you multiply x by 3 you divide y by 3.

x=2, multiply it by 3: x=6

y=24, divide it by 3: y=8

8 0

2 years ago

a 60 kg woman in a elevator is accelerating upward at a rate of 1.2 m/s2. What is the gravitational force acting upon the woman?

Flura [38]

The gravitational force acting upon the woman is equal to <u>-588.6N</u>

Why?

To solve the problem, we need to consider that two forces are acting upon the woman, the first one is related to her weight and the second one is related to the acceleration of the elevator.

Gravitational force acting upon the woman:

$Force=m*gravityacceleration\\\\Force=60kg*-9.81\frac{m}{s^{2}}=-588.6N$

Hence, we have that the gravitational force acting upon the woman is equal to -588.6N.

Have a nice day!

5 0

2 years ago

Any of two or more forms of the same element which differ only in the number of neutrons their atoms contain is called an

telo118 [61]

C. isotope

Isotopes have the same atomic number but different mass number because of the difference in the number of neutrons in the nucleus of the atom.

8 0

3 years ago

Suppose that a constant force is applied to an object. newton's second law of motion states that the acceleration of the object

amm1812

Solve for "x"
X = speed of the 5 kg
3/15=5/x
cross multiply
3x=75
because (15)(5)=(3)(x)
divide 3 in both side
X=25
or
A=25 m/s^2
Hope this helps

6 0

2 years ago

What force is necessary to accelerate a 50kg box at 30 m/s2?

sammy [17]

Answer:

F = m X a

Therefore ,

Force required = 50 X 30 = 1500 newton

6 0

3 years ago