It's Endorphins. That's a pain killer produced by the brain.
The answer is True
Burning fossil fuels DOES causes more air pollution than soil erosion, dust storms, and forest fires
Therapy uses high-energy radiation to shrink tumors and kill cancer cells (1). X-rays, gamma<span> rays, and charged particles are types of radiation used for cancer treatment.</span>
Answer:
Bohr found experimental evidence for his atomic model by studying <em><u>line spectra</u></em>.
Answer:
10.71m/s
Explanation:
Mechanical energy is conserved since the ramp surface had no friction and the experiences no significant air resistance
Potential energy at the top of the ramp = mgh
where m is m, g = 9.8 m/s² ( acceleration due to gravity ) and h is height
since the length of the surface L of the ramp is 20.0 m and it is inclined at 17°
h, height = Lsinθ = 20 sin 17° = 5.85 m
kinetic energy of the block = mv²
potential energy = kinetic energy
m × 9.8 × 5.85 m = mv²
cancel m on both side
v = √(2 × 9.8 × 5.85) = 10.71m/s