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3 years ago

If I start driving 80 miles per hour down the interstate how far will I go if I Drive for 4.5 hours

1 answer:

4 0

If you are driving 80 miles per hour, you are driving 80 miles for every hour. So if you drive for 4.5 hours, multiply. 80 x 4.5= 360miles

helpful formula:<span>S = V x T

Speed= Velocit</span>y(80mph) x Time(4.5hrs)

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A baton twirler has a baton of length 0.36 m with masses of 0.48 kg at each end. Assume the rod itself is massless. The rod is f

AleksAgata [21]

Answer:

Part a)

When rotated about the mid point

$\tau = 0.021Nm$

Part b)

When rotated about its one end

$\tau = 0.042 Nm$

Explanation:

As we know that the angular acceleration of the rod is rate of change in angular speed

so we will have

$\alpha = \frac{\Delta \omega}{\Delta t}$

$\alpha = \frac{2.4 - 0}{3.6}$

$\alpha = 0.67 rad/s^2$

Part a)

When rotated about the mid point

$I = 2mr^2$

$I = 2(0.48)(0.18)^2$

$I = 0.0311 kg m^2$

now torque is given as

$\tau = 0.0311 (0.67)$

$\tau = 0.021Nm$

Part b)

When rotated about its one end

$I = m(2r)^2$

$I = (0.48)(0.36)^2$

$I = 0.0622 kg m^2$

now torque is given as

$\tau = (0.0622)(0.67)$

$\tau = 0.042 Nm$

3 0

3 years ago

Identify the statement that is true about mass extinctions.A. Mass-extinction events are times in the Earth's history when few s

nikklg [1K]

Answer:

A. Mass-extinction events are times in the Earth's history when few species evolve.

Explanation:

The extinction that occurred 65 million years ago wiped out some 50 percent of plants and animals. The event is so striking that it signals a major turning point in Earth's history, marking the end of the geologic period known as the Cretaceous and the beginning of the Tertiary period.

A wide range of animals and plants suddenly died out, from tiny marine organisms to large dinosaurs.

Species go extinct all the time. Scientists estimate that at least 99.9 percent of all species of plants and animals that ever lived are now extinct.

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3 years ago

Ozone, O3 methane, CH4 oxygen gas, O2 Are classified as

erma4kov [3.2K]

I would think compounds.

5 0

3 years ago

Read 2 more answers

100g converted to kg .

natka813 [3]

Answer: 0.1 kilogram

4 0

3 years ago

Do we know which has more potential energy? object A or B? Best answer with reasoning gets brainliest.

babymother [125]

Answer:

Object C has the most potential energy.

Between A and B, we do not know which has more potential energy.

Explanation:

We know the object with the most potential energy and this is the object at C.

Potential energy is the energy due to the position of a body above the ground surface.

The higher a body is above ground, the more its potential energy.

Potential energy = mass x acceleration due to gravity x height

So;

Object C has the most potential energy.

Between A and B, we do not know which has more potential energy.

This is because, the height and mass of the objects are not quantified using numbers.

Potential energy is a function of mass and height and acceleration due to gravity but acceleration due gravity is a constant.

3 0

3 years ago