Which term refers to the phenomenon of light shining on a metal and causing electrons to break free from their atoms?A. Blackbody radiation
B.Ultraviolet catastrophe
C. Emission spectra
D. Photoelectric effect
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Related Questions
When is acceleration the greatest on a graph
The four terrestrial planets that have solid, rocky surfaces areA. Mars, Venus, Earth, and Jupiter.B. Mercury, Venus, Jupiter, and Mars.C. Mercury, Jupiter, Saturn, and Mars.D. Mercury, Venus, Earth, and Mars.
Which of the following best explains why clear-cutting forests is more destructive than selectively cutting down trees in forests?a. Clear-cutting eliminates all trees leaving none behind to maintain soil fertility or house native animals. b. Clear-cutting places the land at greater risk for wildfires. c. Clear-cutting makes land more attractive for human development. d. Clear-cutting causes less soil erosion than selective cutting.
Scientists have observed that the average sunspots have increased in the last 50 years. Which of these statements best describes an effect of this increase in sunspots? A) Earth's temperature has become cooler. B) Earth's temperature has not changed over time. C) Earth's temperature has become warmer. D) Earth's temperature has reduced by fifty times.
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Answer
Chemical energy in to thermal energy
Explanation
When acetylene fuel is burning in presence of oxygen, we have chemical process taking place. The torch is used to heat metal to its kindling temperature in oxy-fuel cutting. The steam of gas is then trained on the metal burning it into a metal oxide that flows out of the spout.
So the energy transformation represents this process is Chemical energy into thermal energy
Here are the following choices:
A. Chemical energy turns into thermal energy.
B. Kinetic energy turns into potential energy.
C. Thermal energy turns into electromagnetic energy.
D. Potential energy turns into chemical energy.
B) pressure changes
C) temp changes
D) all the other choices
E)enters new medium
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Time = d/v
Fisrt calculate time : ( 118/29 ) = 4 seconds
Then calculate acceleration
A = 29/4 = 7.25 m/s²
Now the force.
Force = mass * acceleration.
F= 1,019 * 7.25
F= 7,387 N
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1. First determine the suitable formula for this word problem. Which is a. A=vf-vi/t
Given are: Vf=99.2 km/h Vi= 0.0 km/h T= 4.0sec
Solution:
A= 99.2 km/h – 0.0km/h / 4.0 sec
A = 99.2 km/h / 4 sec
A = 2.8 km/h/sec
Answer:
24.8 km per second
Explanation:
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Answer:
vB = 15.4 m/s
Explanation:
Principle of conservation of energy:
Because there is no friction the mechanical energy is conserve
ΔE = 0
ΔE : mechanical energy change (J)
K : Kinetic energy (J)
U: Potential energy (J)
K = (1/2)mv²
U = m*g*h
Where :
m: mass (kg)
v : speed (m/s)
h : hight (m)
Ef - Ei = 0
(K+U)final - (K+U)initial =0
(K+U)final = (K+U)initial
((1/2)mv²+m*g*h)final = ((1/2)mv²+m*g*h)initial , We divided by m both sides of the equation:
((1/2)vB² + g*hB = (1/2 )vA²+ g*hA
(1/2) (vB)² + (9.8)*(14.7) = 0 + (9.8)(26.8 )
(1/2) (vB)² = (9.8)(26.8 ) - (9.8)*(14.7)
(vB)² = (2)(9.8)(26.8 - 14.7)
(vB)² = 237.16
vB = 15.4 m/s : speed of the cart at B
Answer:
the guy above me is correct
Explanation:
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3x10^8=5.5x 10^4 λ
λ=5.45x10^3m
Answer:
5.5 x 10-3 meters