1.What is true about heat capacity and specific heat?a) Only heat capacity accounts for mass.

b) Both heat capacity and specific heat account for mass.

c) Neither specific heat nor heat capacity accounts for mass.

d) Only specific heat accounts for mass.

2. Which of the following factors is not used in calculating the specific heat of a substance?

a) mass

b) temperature change

c) heat required for a temperature change

d) melting point

3. The amount of heat needed to raise 250 g of a substance by 15 K is 2,930 J. What is the specific heat of the substance ?

a) 0.78

b) 11,000

c) 780

d) 1.1 × 10^7

4. If 50 g of liquid water [C = 4,180 J/(kgK)] changes temperature in a calorimeter from 298 K to 348 K, then how much heat is transferred?

a) 10.5 J

b) 10.5 kJ

c) 72.7 J

d) 100 kJ

Answers

Answer 1

Answer: 1-c. 2-d. 3-a. and 4 is -b.

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What speed would a +1.00 C particle need to have to travel in a straight line through a 5.00 T magnetic field that is directed into the screen and a 2.00 V/m electric field that is directed from top to bottom?40.0 m/s
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0.0400 m/s

I will report you if you give a cruddy answer - please explain!

Answers

Okay so we need to bring a couple of equations into this

First E =F/q

We have our q and E lets solve for F

F = Eq

So remember th equation

F = qV x B

F = qVBsin(Ф)

The angle is perpendicular so

sin(90) = 1

F = qVB

Solve for V

F/qB = V

Eq/qB = V

Look at that the charges cancel out!

V = E/B

(Fun fact: Thats what they use in mass spectrometers which is why it says the particle should travel in a straight line)

Anyways lets solve this!

V = 2/5

V = 0.4 m/s

there are 2 forces acting on the particle: magnetic n electric force

the 2 forces must be equal 4 it to travel in a straight line

as it has +1C charge, q, the charge is dropped in the following:

magnetic force = qv x B where v is velocity n B is magnetic field;

x represents cross-product which in this case of 90-deg. is same as multiply

magnet force = v*5

electric force = qE where E is electric field

= 2

as magnet force = electric force

v*5 = 2

v=2/5=0.400m/s

What pressure, in millimeters of mercury (mm Hg), is equivalent to 2.13 atmospheres

Answers

The "Standard Atmosphere" is 760 mm Hg . 2.13 times that pressure is (2.13 x 760) = 1,618.8 mm Hg.

Gravitational potential energy is a form of potential energyA.) caused by gravity alone.
B.) caused by gravity and that depends on an object's position and mass.
C.) caused by gravity and that depends on an object's mass, but not its position.
D.) caused by gravity and that depends on an object's position, but not its mass.

Answers

B. The mass and height dictates the force gravity will pull on it

Using the value of atmospheric pressure at sea level, 1 × 105 Pa, estimate the total mass of the earth's atmosphere above a 5-m2 area.

Answers

Answer:

5×10^4 kg

Explanation:

pressure= force/Area

area= 5m^2

pressure = 1×10^5 Pa

1×10^5=mg/5 (weight will be the force)

5×10^5=m×10 (gravitational field strength of the earth)

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mass=5×10^4 kg!

hope this helps!

Magnetic fields are produced by particles that are(1) moving and charged
(2) moving and neutral
(3) stationary and charged
(4) stationary and neutral

Answers

Magnetic fields are produced by particles that are moving and charged.

Answer:

the correct answer is 1 moving and charged.

Explanation:

Magnetic fields are produced by moving electric charges. Everything is made up of atoms, and each atom has a nucleus made of neutrons and protons with electrons that orbit around the nucleus.

What is potential energy?

Answers

Potential Energy is a type of energy that is "possessed" by a body of its position, electrical charge, etc.

Answer:

potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.

Explanation:

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