Answer:
50 cm
Explanation:
Given that
Focal length of the mirror, f = 25 cm
Distance of the image, u = ?
Distance of the object, v = 50 cm
The formula for the focal length of a convex mirror is given by the relation
1/f = 1/u + 1/v,
where each of the parameters are exactly the same as what I've defined above. So now, if we plug in the values, we have
1/25 = 1/u + 1/50
1/u = 1/25 - 1/50
1/u = (2 - 1)/50
1/u = 1/50
u = 50 cm
So then, we can conclude that the size of the image is 50 cm
Answer:They need the Heimlich maneuver performed
Explanation:
Which means Get the person to stand up.
Position yourself behind the person.
Lean the person forward and give five blows to their back with the heel of your hand.
Place your arms around their waist.
Make a fist and place it just above the navel, thumb side in.
Grab the fist with your other hand and push it inward and upward at the same time. Perform five of these abdominal thrusts.
Repeat until the object is expelled and the person can breathe or cough on their own.
Electronic tablets and cell phones
