Q: A $$5\ \text{C}$$ charge is placed $$0.2\ \text{m}$$ away from a $$10\ \text{C}$$ charge. What is the magnitude of the electrostatic force between them? Use $$k = 9 \times 10^9$\ \text{N}\cdot\text{m}^2/\text{C}^2.$$

$$F = 1.125 \times 10$$^{12}$$\ \text{N}$$

Q: Which equation correctly represents the law of conservation of mass in a chemical reaction?

$$\text{Total mass of reactants} = \text{Total mass of products}$$

Question 1

A transverse wave travels along a string with a speed of $$v = 20\ 	ext{m/s}$$ and a frequency of $$f = 5\ 	ext{Hz}. $$What is the wavelength of the wave?

Accepted Answer

$$\lambda = 4\ 	ext{m}$$

Question 2

Which of the following best describes the difference between transverse and longitudinal waves?

Accepted Answer

Transverse waves oscillate perpendicular to the direction of propagation, while longitudinal waves oscillate parallel.

Question 3

A sound wave travels through air at $$340\ 	ext{m/s}. If $$its wavelength is $$0.85\ 	ext{m}$$, what is its frequency?

Accepted Answer

$$f = 289\ 	ext{Hz}$$

Question 4

Which statement about electromagnetic radiation is correct?

Accepted Answer

Electromagnetic waves can travel through a vacuum.

Question 5

A $$5\ 	ext{C}$$ charge is placed $$0.2\ 	ext{m}$$ away from a $$10\ 	ext{C}$$ charge. What is the magnitude of the electrostatic force between them? Use $$k = 9 	imes 10^9$\ 	ext{N}\cdot	ext{m}^2/	ext{C}^2.$$

Accepted Answer

$$F = 1.125 	imes 10$$^{12}$$\ 	ext{N}$$

Question 6

In an electric circuit, if the resistance is doubled while the voltage remains constant, what happens to the current?

Accepted Answer

The current is halved.

Question 7

Which of the following is a scalar quantity?

Accepted Answer

Speed

Question 8

A car accelerates from rest at $$2\ 	ext{m/s}^2$$ for $$5\ 	ext{s}. $$What is its final velocity?

Accepted Answer

$$v = 10\ 	ext{m/s}$$

Question 9

Which equation correctly relates kinetic energy to mass and velocity?

Accepted Answer

$$E_k = \frac{1}{2}mv^2$

Question 10

Which of the following best describes a physical change?

Accepted Answer

The substance changes state but retains its chemical identity.

Question 11

According to the kinetic molecular theory, which statement is true about gases?

Accepted Answer

Gas particles move randomly and are far apart.

Question 12

Which of the following elements has the highest electronegativity?

Accepted Answer

Fluorine

Question 13

Which type of chemical bond involves the sharing of electron pairs between atoms?

Accepted Answer

Covalent bond

Question 14

Which of the following is a chemical change?

Accepted Answer

Rusting of iron

Question 15

Which statement about the periodic table is correct?

Accepted Answer

Elements in the same group have similar chemical properties.

Question 16

A chemical reaction is represented as $$2H_2 + O_2$ \rightarrow 2H_2O. $$How many moles of water are produced from 4 moles of $$O_2$$?

Accepted Answer

8 moles

Question 17

Which of the following best describes a mixture?

Accepted Answer

A combination of two or more substances that retain their individual properties.

Question 18

A student mixes hydrochloric acid ($$HCl) $$and sodium hydroxide ($$NaOH) in a $$beaker. Which type of chemical reaction occurs?

Accepted Answer

Neutralization

Question 19

Which equation correctly represents the law of conservation of mass in a chemical reaction?

Accepted Answer

$$	ext{Total mass of reactants} = 	ext{Total mass of products}$$

Question 20

A ball is thrown vertically upward with an initial velocity of $$15\ 	ext{m/s}. $$Ignoring air resistance, what is its maximum height? Use $$g = 9.8\ 	ext{m/s}^2.$$

Accepted Answer

$$h = 11.5\ 	ext{m}$$

Physics Paper 1: Core Topics Study Guide

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