Which of the following are equivalent units?

A) a watt and a joule

B) a newton-meter and a joule

C) a newton and a joule/sec

D) a watt and a newton

Which of these os true? (A) light travels in a straight line. (B) light travels in a random manner. (C) parallel beams are divergent in nature. (D) parallel beams are convergent in nature. (E) non of the above

The sun continuously radiates energy into space, some of which is intercepted by the earth. The average temperature of the surface of the earth remains about 300K.

A force of 19 newtons is applied on a cart of 2 kilograms, and it experiences a frictional force of 1.7 newtons. What is the acceleration of the cart

The acceleration due to gravity is g at the earth's surface. an earth satellite is orbiting at a distance from the earth's surface equal to one earth radius. at this location, what is the acceleration due to gravity

How are all mobile phones different from fixed telephones in the way that they transmit and receive voice messages?

if the distance of separation begin two objects is doubled, is the gravitational force between the objects increased or decreased? by what factor?

A researcher measures the thickness of a layer of benzene (n = 1.50) floating on water by shining monochromatic light onto the film and varying the wavelength of the light.

A rock has a height of 4 cm, a length of 5 cm, and a width of 2 cm. what is the volume of the rock?

The filament of a certain lamp has a resistance that increases linearly with temperature. When a constant voltage is switched on, the initial current decreases until the filament reaches its steady-state temperature.

What is the mass number of the particle emitted from the nucleus during beta minus decay? What kind of charge does the particle emitted from the nucleus during beta minus decay have?