Recent questions in Physics

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Calculate the efficiency of 30 000 W of power shipped at 5000 V over 15 Ohms transmission lines.

Hiraku asked Dec 28, 2024

by Hiraku

8.2k points

1 answer

3 votes

198k views

a boat heads due east across a 100. m-wide stream with a velocity of 20.0 m/s. the stream is flowing from north to south at a rate of 5.00 what is the resultant speed of the boat?

Herb Caudill asked Dec 28, 2024

by Herb Caudill

9.0k points

1 answer

2 votes

177k views

Your friend stated that action and reaction force pairs do not change motion because they cancel one another out. Explain why your friend is incorrect, using an everyday example to clarify your explanation.

Kungi asked Dec 28, 2024

by Kungi

7.7k points

1 answer

1 vote

71.4k views

100. In order to produce a magnetic field, an electric charge must be (1) stationary (2) moving (3) positive (4) negative

Rodrigo Pauletti asked Dec 28, 2024

by Rodrigo Pauletti

7.8k points

1 answer

0 votes

15.2k views

Explain why walls and ceiling boards are painted white

Francois Stock asked Dec 28, 2024

by Francois Stock

8.5k points

1 answer

4 votes

219k views

What is the kinetic energy when the height is 2 m? A) 0.392 J B) 3.92 J C) 1.96 J D) 0.98 J

Krekkon asked Dec 28, 2024

by Krekkon

8.0k points

1 answer

2 votes

58.6k views

A 2.20 kg box is moving to the right with speed 8.00 m/s on a horizontal, frictionless surface. at t = 0 a horizontal force is applied to the box. The force is directed to the left and has magnitude f(t)=(

Wekempf asked Dec 28, 2024

by Wekempf

6.4k points

1 answer

2 votes

35.0k views

Perpendicular lines have slopes that are flipped and have the opposite sign. A.True B. false

Ryan Penfold asked Dec 28, 2024

by Ryan Penfold

7.9k points

1 answer

5 votes

86.4k views

What is the energy, in joules, carried by a quantum of violet light that has a wavelength of 2.59 x 10^-9 m?

Tushar Kesare asked Dec 28, 2024

by Tushar Kesare

8.9k points

1 answer

2 votes

155k views

Find the equation of motion if the mass is driven by an external force equal to f(t) = 24 cos(2t) + 6 sin(2t)?

Klayton Faria asked Dec 28, 2024

by Klayton Faria

8.7k points

1 answer

0 votes

89.1k views

In electric generators, when is the magnetic flux changed from its maximum to zero, inducing an emf?

Ranjith R asked Dec 28, 2024

by Ranjith R

8.7k points

1 answer

1 vote

233k views

An ideal rectal temperature is: A. 99.6°F B. 98.6°F C. 97.6°F D. 98.6°F

Halacs asked Dec 28, 2024

by Halacs

8.3k points

1 answer

5 votes

69.7k views

The mass of a girl was 60kg

Niels Brinch asked Dec 28, 2024

by Niels Brinch

8.0k points

1 answer

1 vote

13.1k views

The initial position vector of a particle on the xy plane is (5,2), and its final position vector is (-2,-3). If distance is measured in centimeters. a. Not enough information b. The particle moved 10

SoCal asked Dec 28, 2024

by SoCal

7.5k points

1 answer

0 votes

178k views

Using the definition of the speed of light (299,792,458), if light has a wavelength of 7E-7m, what is it's frequency?

Etelka asked Dec 28, 2024

by Etelka

8.1k points

1 answer

2 votes

81.4k views

Scarlett and Hunter Johansson are working together to push a block of mass 27 kg across the floor. Each provides a force of magnitude 277 N but the directions of the forces differ as indicated in the diagram.

Frank De Jonge asked Dec 28, 2024

by Frank De Jonge

8.5k points

1 answer

2 votes

125k views

if a person pushes the 5 kg door with 7 N of force, what is the acceleration of the door when it opens?

ViG asked Dec 28, 2024

by ViG

8.6k points

1 answer

1 vote

105k views

What is an example of adding force when weight lifting? O staying at the gym longer and completing the same intensity workout O adding more weight to a current workout routine

Anlo asked Dec 28, 2024

by Anlo

7.7k points

1 answer

5 votes

129k views

The radius of Mars is approximately one-half the radius of Earth, and the mass of Mars is approximately one-tenth the mass of Earth. If Earth exerts a gravitational force of magnitude F on Mars, what is

Ahmad Badpey asked Dec 28, 2024

by Ahmad Badpey

7.5k points

1 answer

1 vote

96.0k views

What belief of other astronomers did Edwin Hubble's discovery confirm? A) Galaxies are made up of dark matter. B) Galaxies are connected by wormholes. C) Galaxies exist beyond the Milky Way. D) Galaxies

Neolith asked Dec 28, 2024

by Neolith

8.5k points

1 answer

5 votes

165k views

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