If a 15 kg mass accelerates at a rate of 4 m/s2, what net force acts on it?

A 15 N

B 4N

C 3.75 N

D 60 N

E. 267 N

If a bus start to move with the speed of 20 metre per second calculate the time taken to cover a distance of 72 km

A neutral atom must have the same number of neutrona and protone, O O A True B False

Suppose that a car traveling to the west (-x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its acceleration. a) The car is decelerating and its acceleration is positive.

Speed of sound Material speed of sound in m/s air 331 helium 972 tap water 1493 sea water 1533 aluminum 5100 Based on the table, what would you predict the speed of sound through ice would most likely be?

What is the speed of gravity

The magnitude of a velocity vector is called speed. suppose that a wind is blowing from the direction n45°w at a speed of 40 km/h. (this means that the direction from which the wind blows is 45° west of the northerly direction.

The y component of the electric field of an electromagnetic wave traveling in the + x direction through vacuum obeys the equation Ey = (375 N/C) cos[kx - (2.20 * 1014 rad/s) t]. What is the wavelength of this electromagnetic wave? (c = 3.

The work of Subrahmanyan Chandrasekhar is likely to have been most influenced by the work of which of the following scientists? A. Albert Einstein B. Edwin Hubble C. Marie Sklodowska-Curie D. Lord Kelvin

Explain why it's important that the alveoli is only 1 cell thick

A new cannon was being developed in a science lab. The instructor wanted to do some testing of the cannon's ability to launch objects with different masses. The instructor used tennis balls and filled them with lead, rocks, and styrofoam.