All categories

4 years ago

The amount of heat needed

1 answer:

4 0

Q = mcθ

Where Q = Amount of heat in J
   m = Mass of substance in kg
      θ = Temperature rise in °C or K
      C = Specific heat capacity in J/kgK

From given data:
Q = 33 kJ = 33 000 J, m= 2.0 kg, θ = 80 K, c = ?

33000 = 2 * c * 80
33000 = 160c
160c = 33000
   c = 33000/160 = 206.25

Therefore specific heat capacity is 206.25 J/kgK

You might be interested in

Please reply to me.

inysia [295]

<h3>✽ - - - - - - - - - - - - - - - ~<u>Hello There</u>!~ - - - - - - - - - - - - - - - ✽</h3>

➷ It would be C

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

6 0

4 years ago

Read 2 more answers

What happens to the temperature and thermal energy of water when it is heated in a pot on the stove?

Gekata [30.6K]

Answer:

Both its temperature and its thermal energy will increase.

Explanation:

Objects are made up of particles. For example, water is made up of water molecules. The kinetic energy of a particle of mass $m$ and velocity $v$ is equal to $\displaystyle \frac{1}{2}\, m \cdot v^2$ ,

The thermal energy of an object measures the total kinetic energy of all its particles.
On the other hand, the temperature of that object measures the average kinetic energy of all these particles.

Water in that pot gains energy when the pot is heated. That would increase the total kinetic energy of these water molecules.

What about temperature? Assume that the number of water particles in the pot stays the same- In other words, assume that water in the pot does not evaporate. As the total kinetic energy of these water molecules increase, their average kinetic energy would also increase. As a result, it would appear that the temperature of water in that pot has increased.

7 0

4 years ago

In a collision, the __________ collision is when an unsecured driver strikes the inside of the vehicle.

zaharov [31]

In a collision, the second collision is when an unsecured driver strikes the inside of the vehicle. It is a collision that happens between an occupant of a vehicle and the vehicle he is riding during the impact. The first collision would be the collision of the vehicle and the other object.

6 0

3 years ago

Read 2 more answers

At the instant a traffic light turns green, a car starts from rest with a given constant acceleration of 0.5 m/s squared. Just a

lubasha [3.4K]

Answer:

d= 1024 m

Explanation:

Kinematics of the car

The car moves with uniformly accelerated movement we apply the following formula:

d= v₀t+ (1/2)*a*t² Formula (1)

Where:

d:displacement in meters (m)

t : time in seconds (s)

v₀: initial speed in m/s

a: acceleration in m/s²

Data

v₀₁= 0 :initial speed of the car

a₁ =0.5 m/s² : acceleration of the car

Kinematics equation of the car

We replace data in the formula (1) :

d= 0+ (1/2)*0.5*t²

d= (0.25)*t² Equation (1)

Kinematics of the bus

The car moves with uniformly movement ( constant speed) we apply the following formulas:

d= v*t Formula (2)

Where:

d:displacement in meters (m)

t : time in seconds (s)

Data

v = 16 m/s

Kinematics equation of the bus

We replace data in the formula (2) :

d= 16*t Equation (2)

<em>Problem development</em>

when the car passes the bus the elapsed time (t) and the distance (d) is equal for both.

Equation (1) = Equation (2)=d

(0.25)*t² =16*t We divide both sides of the equation by t

(0.25)*t = 16

t= 16/(0.25)

t= 64 s

We replace t in the equation (2)

d= 16*t

d= 16*(64)

d= 1024 m

<em />

5 0

3 years ago

Two waves travel through ocean, one with wavelength 3 m, one with 6 m. Which one has greater speed?

spin [16.1K]

Answer: 6m

Explanation: 6 is more than 3 and their both being measured by m

4 0

3 years ago