Answer:
Its A
Explanation:
The lens bulges outward in its center, like reading glasses.
Light travels in straight lines. Once a light has been produced, it will keep moving in a straight line until it hits something else. Shadows are evidence of light traveling in straight lines. An object blocks light so that it can’t reach the surface where we see the shadow.
Answer:
a) 0.41 m/s
b) 0.51 m/s
Explanation:
(a)
M = total mass of wagon, rider and the rock = 93.1 kg
V = initial velocity of wagon = 0.456 m/s
m = mass of the rock = 0.292 kg
v = velocity of rock after throw = 15.4 m/s
V' = velocity of wagon after rock is thrown
Using conservation of momentum
M V = m v + (M - m) V'
(93.1) (0.456) = (0.292) (15.4) + (93.1 - 0.292) V'
V' = 0.41 m/s
b)
M = total mass of wagon, rider and the rock = 93.1 kg
V = initial velocity of wagon = 0.456 m/s
m = mass of the rock = 0.292 kg
v = velocity of rock after throw = - 15.4 m/s
V' = velocity of wagon after rock is thrown
Using conservation of momentum
M V = m v + (M - m) V'
(93.1) (0.456) = (0.292) (- 15.4) + (93.1 - 0.292) V'
V' = 0.51 m/s
To help make sure information goes from short-term memory to long-term memory, you can use memory-enhancing strategies. One strategy is rehearsal, or the conscious repetition of information to be remembered. Think about how you learned your multiplication tables as a child.
Proven ways to protect memory include following a healthy diet, exercising regularly, not smoking, and keeping blood pressure, cholesterol, and blood sugar in check. Living a mentally active life is important, too. Just as muscles grow stronger with use, mental exercise helps keep mental skills and memory in tone.
According to one study, mental stimulation like reading can help protect memory and thinking skills, especially as you age. The authors even suggest that reading every day can slow down the late-life cognitive decline. ... The act of reading helps to heighten overall brain function and increase memory.
Let's take a deeper dive into evidence-based exercises that offer the best brain-boosting benefits.
Have fun with a jigsaw puzzle. ...
Try your hand at cards. ...
Build your vocabulary. ...
Dance your heart out. ...
Use all your senses. ...
Learn a new skill. ...
Teach a new skill to someone else. ...
Listen to or play music.
