Answer:
Explained
Explanation:
Light from the distance objects can be used to find the luminosity of the object. Once, Luminosity is known that is the energy emitted by the starts are known.
Scientist can now find out the temperature of the stars because Hot objects emit more of their light of short wavelength and cold objects emit more of their light of longer wavelength. Therefore the difference in temperature of the stars can be known.
20 N
Newtons third law states that any action (pulling the sled) has an equal and opposite reaction (the sled pulling back on you).
Think about pulling a sled on really slippery ice, you would pull yourself toward the sled just as much as the sled toward you.
Answer:
288 cm is 2.88 meters. This is because each centimeter is 1/100th of a meter, or in other words, each meter is 100 cm. To find out cm-m, divide the amount of cm by 100 and change the unit to m.
Explanation:
formula is cm/100=m
288/100= 2.88m
Answer:
20m per sec
Explanation:
40÷ 2 = 20 which is your acceleration per sec
Answer:
v = 12.8 m/s
Explanation:
Applying the law of conservation of energy:
where,
m₁ = mass of baseball = 149 kg
m₂ = mass of catcher = 57 kg
u₁ = initial speed of ball = 17.7 m/s
u₂ = initial speed of catcher = 0 m/s
v₁ = v₂ = v = final speed of ball and the final speed of catcher = ?
both are same because ball is in hands of cathcer in the final state.
Therefore,
<u>v = 12.8 m/s</u>