What must be your average speed in order to travel 350 km in 5.15 h? *66.0 km/h
67.0 km/h
68.0 km/h
69.0 km/h

Answers

Answer 1

Answer: v= s/t

=
5.15/ 350

=68.0 km/h

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What is an isotope ?

Answers

An isotope is a form of a chemical element whose atomic nucleus contains a specific number of neutrons in addition to the number of protons that distinctively defines the element. The nuclei of most atoms have neutrons as well as protons.

Which characteristic does an object with a constant acceleration always have?A. changing velocity
B. constant velocity
C. fast speed
D. slow speed

Answers

By definition, speed is the integral of acceleration with respect to time.

We have then:

$v = \int\limits^t_0 {a} \, dt$

As the acceleration is constant, then integrating we have:

$v = a*t + vo$

Where,

vo: constant of integration that corresponds to the initial velocity

We observe then that the speed varies linearly when the acceleration is constant .

Therefore, for constant acceleration, the velocity is changing.

Answer:

an object with a constant acceleration always have:

A. changing velocity

The characteristic that an object with constant acceleration will always have is Changing velocity

Answer. . .
A. Changing Velocity corresponds with acceleration.

Good luck on your studies, hope this helps~ ^//^

Steve and Carl are driving from Scranton to Bridgeport, a distance of 180 miles. If their speed averages60 miles an hour, how long will it take them to get there?
A. 3.5 hours
B. 3 hours
C. 2.5 hours
D. 4 hours

Answers

The answer is B
every hour, Steve and Carl cover 60 miles
if they need to cover 180 miles it will take them 3 hours
you can set up a proportion
60/1=180x where x is the amount of hours Steve and Carl will drive to cover 180 miles.
proportion simplifies to this:
60x=180
isolate the varible
60x/60=180/60
x=3

the answer is B 3 hours

a 1.0 kg ball is thrown into the air with an initial velocity of 30 m/s. How much kinetic energy does the ball have?

Answers

KE=.5mv^2
KE=.5(1)(30^2)
KE=(.5)(900)
KE=450
Assuming no air resistance....

Final answer:

The kinetic energy of a 1.0 kg ball thrown with an initial velocity of 30 m/s is calculated using the formula KE = 1/2 mv^2, resulting in an energy of 450 Joules.

Explanation:

The question you've asked pertains to calculating the kinetic energy of a ball thrown into the air. To find the kinetic energy (KE) of a 1.0 kg ball thrown with an initial velocity of 30 m/s, you can use the formula KE = ½ mv², where m is the mass of the ball and v is the velocity. Plugging in the values, you get KE = ½ × 1.0 kg × (30 m/s)² = 0.5 × 1.0 × 900 = 450 J. Therefore, the kinetic energy of the ball is 450 Joules.

Learn more about kinetic energy here:

brainly.com/question/26472013

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Convert 550 cm into m. Please show your work

Answers

There are 100cm in one metre. Hence, divide 100 by 550 to figure out for much 550cm is in meters. It is 5.5m.

The refractive index of water is greater than that of air but is less than that of glass or a diamond. Under which condition can there be total internal reflection in water?

Answers

For total internal reflection to happen, light must travel from a medium object of higher density to a medium of lower density. To make sure that total internal reflection will happen in water, then the light must originate from glass or diamond before entering water.

Answer:

C.When light travels from water to air

Explanation:

Plato user

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