A rubber ball is held 4.0 m above a concave spherical mirror with a radius of curvature of 1.5 m. At time equals zero, the ball is dropped from rest and falls along the principal axis of the mirror. How much time elapses before the ball and its image are at the same location?

The time elapsed when the ball placed above the concave mirror and the image formed would be at the same location is 0.55 s.

The position of the image formed is determined using the followimg mirror formula;

[tex]\frac{1}{f} = \frac{1}{v} + \frac{1}{u}[/tex]

where;

f = R/2

f = 1.5/2

f = 0.75 m

When the ball and its image is in the same position, u = v

The position of the ball is calculated as;

[tex]\frac{1}{f} = \frac{1}{u} + \frac{1}{u} \\\\\frac{1}{f} = \frac{2}{u} \\\\u = 2f\\\\u = 2(0.75)\\\\u = 1.5 \ m[/tex]

The time taken for the ball to travel the caluclated distance is determined as;

h = ut + ¹/₂gt²

1.5 = 0  + ¹/₂(9.8)t²

1.5 = 4.9t²

t² = 1.5/4.9

t² = 0.306

t = 0.55 s

Thus, the time elapsed when the ball and its image are at the same location is 0.55 s.

Learn more about concave mirror here: https://brainly.com/question/7512320

Example 2- If a weather balloon initially has a volume of 25000mL, but then rises up in the air and its new
pressure is 5atm, and its new volume is 15L, what was its initial pressure?
pressure
Binder

Choose the answer that describes the hierarchy among these three body regions.
A. The oral region is part of the facial region, and the facial region is part of the cephalic region.
B. The cephalic region is part of the facial region, and the facial region is part of the oral region.
C. The cephalic region is part of the facial region, and the facial region is part of the manual region.
D. The oral region is part of the cephalic region, and the cephalic region is part of the facial region.

Which one of the following pairs of atoms would form a non-polar covalent bond?

a. Cl and C1

b. Na and Cl

C. C.and o

d. N and O

given scientific reason for Nacl dissolves in water​

Which type of stars have the highest luminosity?

A. main sequence

B. blue giants

C. red super giants

D. BOTH blue giants and red super giants​

HELP PLS ASAP


how many liters of CO2 are produced when 32.6 liters of propane gas C3H8 reacts with excess oxygen at STP?

C3H8 + 5O2 > 4H2O + 3CO2

Use the periodic table to answer the questions below.
Which diagram shows the correct electron
configuration for nitrogen (N)?

What do these 2 changes have in common?
Both are only physical changes.
Both are caused by heating.
Both are chemical changes.
Both are caused by cooling.

Laura sees a horse pulling a buggy.

Which statement best describes the forces acting on the horse and buggy?

The net forces exerted on the horse and cart are the same, but the action force is larger.
The net forces exerted on the horse and cart are the same, but they are in the same direction.
The net forces exerted on the horse and cart are not the same, so the two forces cancel out.
The net forces exerted on the horse and cart are not the same, so they are not balanced forces.

One-fourth of a gaseous mixture is Argon and 3/4 of the gas is Oxygen. The total pressure in the container
is 8 atmospheres. What is the partial pressure of the Argon?

Balance the following equation.

( ? )NaCl + ( ? ) AgNO3 → ( ? ) AgCl + ( ? ) NaNO3

What are renewable resources?

(ii) Explain why magnalium is harder than aluminium.

▲ Two general chemistry students working together in the lab weigh out 0.832 g of CaCl2 2 H2O into a crucible. After heating the sample for a short time and allowing the crucible to cool, the students determine that the sample has a mass of 0.739 g. They then do a quick calculation. On the basis of this calculation, what should they do next? (a) Congratulate themselves on a job well done. (b) Assume the bottle of CaCl2 2 H2O was mislabeled; it actually contained something different. (c) Heat the crucible again, and then reweigh it.

Calculate the volume that 3.
60g H2 gas will occupy at stp

Consider the nuclear equation below.
Na-
22Ne +98
0
10
Which is the missing value that will balance the equation?
O-1
O 0
O +1
O +2

Before balancing this equation, how many oxygen atoms are present on the product side of the following equation:

use the equation:

2C6H6 + 1502 →12CO2 + 6H20

Calculate the number of moles of oxygen required to react with 5.00 moles of C6H6.
Show steps

How many particles are there in 3 moles of Ag?

What is the scientific word used to describe the process of the protein in the eggs changing form?

Hi
Can someone explain the second marking point?
Why is it bubbles of air and not C02?

Why can’t sodium metal be manufactured by the electrolysis of brine?

Based on the following data, what is the I-I bond energy?
[tex]\frac{1}{2}[/tex]H2(g) + [tex]\frac{1}{2}[/tex]I2(g) → HI(g); ΔH = 26.36 kJ

Bond Bond Energy (kJ/mol)
H-H 435

H-I 295

A) 208 kJ/mol
B) 155 kJ/mol
C) 365 kJ/mol
D) -208 kJ/mol
E) -155 kJ/mol

An atom of lead has a mass of 17.6 times greater than the mass of an atom of carbon-12. What is the molar mass of this isotope of lead?

Write the full electron configuration for phosphorus, atomic symbol P

How many moles of water are produced from the decomposition of 3.4g of hydrogen peroxide, H2O2

12)
What are the products of photosynthesis?
A)
glucose and oxygen
B)
carbon dioxide and water
C)
carbon dioxide and oxygen
D)
glucose and carbon dioxide

Titanium is a transition metal used as pins and plates to support badly broken bones. Titanium is extracted from an ore that
contains the mineral titanium oxide. This oxide is converted into titanium chloride. Titanium chloride is heated with sodium to
form titanium metal. This reaction takes place in an atmosphere of a noble gas, such as argon
4Na(s) + TICIO
Ti(s) + 4NaCl(s)
Calculate the mass of titanium that can be extracted from 570 kg of titanium chloride.
Relative atomic masses:
CI 35.5
Ti 48

What is the Mass of titanium (g)

Use the molar volume to calculate the number of moles of CO2 in 4.00L of CO2 gas at STP.

Finally, examine the atomic spectrum below. Estimate the wavelength
of each spectral line, then use that collection of wavelengths to try and
determine the identity of the element using the internet. This is the
kind of work a graduate student in chemistry might be assigned to do.
400
450
500
650
700
750
550 600
wavelength (nm)
Identity of the element