3 years ago

Dinosaurs emerged during what time period

1 answer:

swat323 years ago

6 0

Dinosaurs lived between 230 and 65 million years ago, in a time known as the Mesozoic Era<span>. This was many millions of years before the first modern humans, Homo sapiens, appeared. </span>

You might be interested in

4. A desk with a mass of 10 kg is pushed across a floor with an acceleration of 4 m/s?. What

tatiyna

40 N. If you’re using F=MA MxA would be 10x4 which would get you 40 N

6 0

2 years ago

Read 2 more answers

An object has a fixed volume and a variable shape before it changes state.

Wittaler [7]

Answer:

solid to liquid :)

Explanation:

APEX i just took it ;)

4 0

3 years ago

Read 2 more answers

A railroad car moves under a grain elevator at a constant speed of 3.20 m/s. Grain drops into the car at the rate of 240 kg/min.

dedylja [7]

Answer:

F = 768 N

Explanation:

It is given that,

Speed of the elevator, v = 3.2 m/s

Grain drops into the car at the rate of 240 kg/min, $\dfrac{dm}{dt}=240\ kg/min = 4\ kg/s$

We need to find the magnitude of force needed to keep the car moving constant speed. The relation between the momentum and the force is given by :

$F=\dfrac{dp}{dt}$