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
frutty [35]
3 years ago
10

A researcher studying the nutritional value of a new candy places a 4.60 g sample of the candy inside a bomb calorimeter and com

busts it in excess oxygen. The observed temperature increase is 2.69 ∘ C. If the heat capacity of the calorimeter is 32.20 kJ ⋅ K − 1 , how many nutritional Calories are there per gram of the candy?
Physics
1 answer:
blagie [28]3 years ago
8 0

Answer:

4500.5 nutritional calories per gram

Explanation:

Heat lost by the new candy = heat gained by the bomb calorimeter.

Heat gained by the bomb calorimeter = c×ΔT

where c = heat capacity of the calorimeter = 32.20 KJ/K = 32200 J/K

ΔT = change in temperature = 2.69°C = 2.69 K.

Heat gained by the bomb calorimeter = 32200 × 2.69 = 86618 J

Heat lost by the new candy = heat gained by the bomb calorimeter = 86618 J = 20702.2 calories

4.60 g of the new candy lost this amount of calories by undergoing combustion,

The amount of calories per g = 20702.2 calories/4.6 g = 4500.5 calories per gram

You might be interested in
An explosive projectile is launched straight upward to a maximum height h. At its peak, it explodes, scattering particles in all
Varvara68 [4.7K]

Answer:

θ = tan⁻¹ (\frac{19.6 \ h}{v})

Explanation:

This problem must be solved using projectile launch ratios. Let's analyze the situation, the projectile explodes at the highest point, therefore we fear the height (i = h), the speed at this point is the same, but the direction changes, we are asked to find the smallest angle of the speed in the point of arrival with respect to the x-axis.

The speed at the arrival point (y = 0)

           v² = vₓ² + v_y²

Let's see how this angle changes, for two extreme values:

* The particle that falls from the point of explosion, in this case the speed is vertical

         v = v_y

the angle with the horizontal is 90º

* The particle leaves horizontally from the point of the explosion, the initial velocity is horizontal

         vₓ = v

the final velocity for y = 0

         v_f = vₓ² + v_y²

therefore the angle has a value greater than zero and less than 90º

As they ask for the smallest angle, we can see that we must solve the last case

the output velocity is horizontal vₓ = v

Let's find the velocity when it hits the ground y = 0, with y₀ = h

            v_{y}^2 = v_{oy}^2 - 2 g (y-y₀)

            v_{y}^2 = - 2g (0- y₀)

let's calculate

           v_{y}^2 = 2 9.8 h

         

we use trigonometry to find the angle

        tan θ = \frac{v_y}{v_x}

        θ = tan⁻¹ (\frac{v_y}{v_x})

let's calculate

         θ = tan⁻¹ (\frac{19.6 \ h}{v})

3 0
3 years ago
Which term below best matches this definition - a period in European history when many educated people stressed the importance o
german

Answer:

The Enlightenment.

Explanation:

The Enlightenment took place during the eighteen century and it typically involved a period of philosophical, cultural and intellectual movement in which ideas on nature, reason, humanity and God were emphasized on greatly over science and superstition through meetings that were held at coffeeshops, scientific academies, literary salons, masonic lodges, etc. Some of the influential philosophers of the enlightenment were Adam Smith, John Locke, Jean Jacques Rousseau, David Hume, Baruch Spinoza, Montesquieu, Hugo Grotius, Denis Diderot, Gottfried Wilhelm, Cesare Beccaria, Immanuel Kant etc. The enlightenment was also known as the age of reason or the age of enlightenment.

Hence, the enlightenment was a period in European history when many educated people stressed the importance of learning and reasoning; education was considered the key to understanding and solving society's problems.

5 0
3 years ago
10.
aliina [53]

The normal force is the supporting force that is exerted on an object that is in contact with another stable object.

Answer: Option C

<u>Explanation: </u>

Normal force is forward or upward pushing force acting on an object. Mostly the normal force acts as supporting force exerted on the object by the neighbouring stable object with which the object in question is in contact. So normal force falls under the category of contact forces.

Generally, normal force will be acting to support the weight of any object placed on another object. The best examples of normal forces are the weight of the book supported by table or by the pushing force of the wall on the person leaning on the wall.

5 0
3 years ago
Read 2 more answers
What is one factor that helps keep the planets and other solar system objects in orbit around the sun?
pshichka [43]
The answer is D<span>.the gravitational force between the sun and each object in the solar system</span>
7 0
3 years ago
Read 2 more answers
Crest to crest or trough to trough
V125BC [204]
The answer is D. wavelength!
7 0
3 years ago
Other questions:
  • Which statement best describe nucleic acids
    12·2 answers
  • Emir is standing in a treehouse and looking down at a swingset in the yard next door. The angle of depression from Emir's eyelin
    10·2 answers
  • 6. A cat walks 1.5km South and then 2.4km East. What is the total displacement of the cat?
    5·1 answer
  • Two tiny conducting spheres are identical and carry charges of -18.4 µC and +53.0 µC. They are separated by a distance of 2.73 c
    7·1 answer
  • Which part of the electromagnetic spectrum is nearest to radio waves?
    14·2 answers
  • As temperature increases what energy decreases
    10·1 answer
  • A plant blossoms with violet-colored flowers. The flowers appear violet because they all light rays except for rays.
    8·2 answers
  • Two charged objects attract each other with a force of F. What happens to the force between them if one charge is doubled, the o
    8·1 answer
  • HELPPPPP ASAP WILL GIVE brainly to correct answer
    6·2 answers
  • Example of a solid that sunlines is ( ? )
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!