## Following a lecture on transverse and longitudinal waves, four students make Venn diagrams to characterize these waves.

Question Following a lecture on transverse and longitudinal waves, four students make Venn diagrams to characterize these waves. Which Venn diagram is correct? Answer B Explanation: Waves are periodic oscillations created by a disturbance, that travel carrying energy but not matter. There exist two types of waves: – Transverse waves: the direction of the oscillations … Read more

## The moon’s mass is 7.4×1022kg and it orbits 3.8×108m from the earth with a period of 27.3 days.

Question The moon’s mass is 7.4×1022kg and it orbits 3.8×108m from the earth with a period of 27.3 days. part a what is the angular momentum of the moon around the earth? Answer The angular momentum of the Moon around the Earth is given by: where m is the Moon’s mass, v its speed and … Read more

## When a honeybee flies through the air, it develops a charge of +20 pC

Question When a honeybee flies through the air, it develops a charge of +20 pC . Part A How many electrons did it lose in the process of acquiring this charge? Express your answer as a number of electrons. Answer 1.3 × 10⁸ e⁻ Here’s the explanation. When a honeybee flies through the air, it … Read more

## A car traveling with constant speed travels 150 km in 7200 seconds. What is the speed of the car?

Question A car traveling with constant speed travels 150 km in 7200 s. what is the speed of the car Answer 1 (Expert Verified) Speed =   150 km = 150 000 m Speed =   Speed = 20.83 m/s, or 75.0 km/h Answer 2 So 150 km — 7200s7200 s is equal to 120 minutes (7200/60) 120 minutes = 2 hours (120/60) 150 km in 2 hours, we need to know how … Read more

## Increasing the mass attached to a spring will decrease the angular frequency of its vibrations.

Question Increasing the mass attached to a spring will decrease the angular frequency of its vibrations. True or False? Answer Answer: decreases Explanation: The angular frequency of the mass is given by where, k is the spring constant and m be the mass of the body which is doing oscillations. if the mass of the … Read more

## Since v = λ f, the speed v of a wave depends on its frequency f.

Question Since v = λ f, the speed v of a wave depends on its frequency f. True or False?  Answer It’s ++FALSE++, the reason is: speed of the wave depends on the properties of the medium. Example: for a mechanical wave, speed of wave depend on elastic and inertial properties of the medium for … Read more

## The length of a 60 W, 240 Ω light bulb filament is 60 cm

Question The length of a 60 W, 240 Ω light bulb filament is 60 cm. Remembering that the current in the filament is proportional to the electric field, what is the current in the filament following the doubling of its length? Answer Answer: Finally current will be i = 0.35 A Explanation: As we know … Read more

## At what height h above the ground does the projectile have a speed of 0.5v?

Question At what height h above the ground does the projectile have a speed of 0.5v?Express your answer in terms of v and the magnitude of the acceleration of gravity g. Answer Answer: Explanation: It is given that, Speed of the projectile is 0.5 v. Let h is the height above the ground. Using the … Read more

## A 0.50-mm-wide slit is illuminated by light of wavelength 500 nm.

Question A 0.50-mm-wide slit is illuminated by light of wavelength 500 nm. What is the width of the central maximum on a screen 2.0 m behind the slit? Answer Answer: Explanation: A single slit of width x has bright central maximum of width: ω=(2λL)/x Given data x=0.50 mm λ(wavelength)=500 nm L(length)=2.0 m Substitute the given … Read more

## What are the strength and direction of the electric field at the position indicated by the dot in the figure (Figure 1) ?

Question What are the strength and direction of the electric field at the position indicated by the dot in the figure (Figure 1) ? Answer ( Expert Verified ) Strength of the electric field:E = k Q / d²k = 8.99 · 10 ^9d 1 = 5 cm = 0.05 mQ 1 = 3 n C … Read more