A water wave has a frequency of 2 HZ and a wavelength of 5 meters what is its speed

Answers

Answer 1

Answer: Speed, v = fλ.

Where f is the frequency in Hertz, wavelength is in meters.

Speed, v = 2*5 = 10

Speed = 10 m/s.

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2. The speed of truck is 39 m/s. How long does it take for the truck to travel 9,000 m?
The material through which a mechanical wave travels is
An object is located 51 millimeters from a diverging lens. The object has a height of 13 millimeters and the image height is 3.5 millimeters. How far in front of the lens is the image located? A. 1.12 millimeters B. 13.7 millimeters C. 51 millimeters D. 189 millimeters

Is work done if you carry a book across the room at a constant velocity?a. No, the force applied is parallel to the direction of motion.
b. Yes, the force applied is parallel to the direction of motion.
c. No, the force applied is perpendicular to the direction of motion.
d. Yes, the force applied is perpendicular to the direction of motion.

Answers

Answer:

No, the force applied is perpendicular to the direction of motion.

Explanation:

Work done is given by :

$W=Fd\ cos\theta$

F = force

d = displacement

$\theta$ = angle between force and displacement

Work is positive when the force and the displacement are in same direction. Work is negative when the force and the displacement are in opposite direction. When the force and displacement are perpendicular to each other, no work is done.

If we carry a book across the room at a constant velocity, the work done is zero. This is because our weight is acting vertically downward and we are moving forward. The angle between the force and the displacement is 90. So, no work is done.

Hence, the correct option is (c) "No, the force applied is perpendicular to the direction of motion".

No. Work is not done if you carry a book across the room
at a constant velocity?

The force applied is perpendicular to the direction of motion. (C)

Charles's law states that at a constant pressure, the volume of a given amount of gas is _____ to its absolute temperature.

Answers

Directly Proportional

Three balls leave the edge of a table at the same time. Ball A rolls off the table with an initial horizontal velocity. Ball B is launched at an angle and has both an initial horizontal and vertical velocity. Ball C is dropped from rest, and has no initial velocity.a) Explain which one(s) hit the ground first.

b) Explain which one(s) hit the ground last

Answers

Explanation:

Balls A and C have the same initial vertical velocity of zero. Therefore, they land at the same time.

Ball B has a positive initial vertical velocity, so it hits the ground last.

What is the definition of luminosity

Answers

Luminosity is the total amount of energy emitted by a star, galaxy, or other astronomical object per unit time.

The intrinsic brightness of a celestial object or the rate of emission of radiation, visible or otherwise.

The energy transferred from the water in the kettle to the surroundings in 2 hours is46 200 J.

The mass of water in the kettle is 0.50 kg.

The specific heat capacity of water is 4200 J/kg °C.

The initial temperature of the water is 100 °C.

Calculate the average power output from the water in the kettle to the surroundings in 2 hours

Answers

The Last one ☝️ I think

A 12 volt car battery is connected to a 3 ohm brake light. What is the current carrying energy to the lights?

Answers

Answer:

4 A

Explanation:

V = IR, where V=voltage, I=current, R=resistance. This is Ohm's Law. (remember that for units V = volts, Ω = ohms, A = amperes.)

V = IR

12 V = I * 3 Ω

12/3 = I

I = 4 A

Other Questions

A series circuit contains four light bulbs. The switch is opened and one of the bulbs is removed, but not replaced. Then the switch is closed again. What would you expect to see?A) All three remaining light bulbs will be on. B) None of the remaining light bulbs will be on. C) Only the bulb closest to the switch will be on. D) All three remaining light bulbs will be brighter than before.

What large gymnosperm is found in the tropics?

Ocean waves contain energy that is transferred to them by ______ moving across the surface.a. wind b. sunlight

The mass of the sun is 1.99×1030kg and its distance to the Earth is 1.50×1011m. What is the gravitational force of the sun on the earth?