What is the specific heat of an unknown substance if 2000 J of energy are required to raise the temperature of 4 grams of the substance 5 degrees Celsius?

Answers

Answer 1

Answer: The energy required to heat a substance is related by the formula:
Q = mCpΔT ; where Q is the energy, m is the mass of the substance, Cp is the specific heat capacity and ΔT is the change in temperature.
2000 = (4)(Cp)(5)
Cp = 100 Joules / g °C

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What kind of energy does a rubber band have when it is stretched?elastic potential energy

kinetic energy

gravitational potential energy

chemical energy

Answers

It is "Elastic Potential Energy" when a rubber band is stretched

Hope this helps!

Answer:

elastic potential or if you don't have it like I didn't its just potential

Explanation:

PLEASE HELP ME A lens with a surface that curves outward like the exterior of a sphere is __________. (Points : 1) reflected refracted concave convex

Answers

Convex.

Concave curved inward (like how a cave foes in) and convex curves outward. Reflected and refracted do not apply to a lens.

Answer:

Convex

Explanation:

What are examples of devices that use electromagnetic waves

Answers

Radio waves, microwaves, visible light and X Rays.

You run straight off a high diving board at a speed of 6 m/sec. You hit the water 2 seconds later.a. How far did you travel horizontally during the 2 seconds?
b. How far did you travel vertically during the 2 seconds?
c. How fast were you moving horizontally when you hit the water?
d. How fast were you moving vertically when you hit the water?

Answers

My answers are in the comments. Sorry for the repeated answers on some of them

The average distance from the sun to Pluto is approximately 6.10 time 10^9 km. How long does it take light from the sun (384,000 km/s) to reach Pluto?

Answers

From the information as given in the question, the transit time
for light from the sun would be

   (6.1 x 10⁹ km) / (3.84 x 10³ km/sec) = 15,885 seconds (rounded).
   (4.4 hours) .
==============================

-- A better figure for Pluto's average distance from the sun is 5.874 x 10⁹ km.

-- " 384,000 km/sec " is about 28% too high for the speed of light.
    A much better figure is 300,000 km/sec.

Using these numbers, the transit time is

   (5.874 x 10⁹ km) / (3 x 10⁵ km/sec) = 19,580 seconds
   (5.4 hours)

Calculate the displacement for an object traveling at a constant velocity of 32 m/s for 4 s.

Answers

Answer:

128 m

Explanation:

displacement = velocity x time

32 x 4 = 128

Answer:

Displacement= velocity X time

= 32 X 4

=128m/s

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