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3 years ago

What is the average speed of a car that travels 60 meters in 2 seconds?

Physics

1 answer:

blondinia [14]3 years ago

6 0

Answer:

30 m/s

Explanation:

Speed is distance over time. 60 meters / 2 seconds, = 30 m/s.

You might be interested in

10 PTS.

gayaneshka [121]

1.2 x (2.2 x 10⁵) = 264,000 Ω

0.8 x (2.2 x 10⁵) = 176,000 Ω

With a 'nominal' value of 220,000 Ω, it could actually be anywhere between 176,000Ω and 264,000Ω .

8 0

2 years ago

A cylindrical rod of length L is connected across a fixed potential difference, creating a current I through the rod. What would

Inessa05 [86]

Answer:

The value of current through the rod becomes half

$i' = \frac{i}{2}$

Explanation:

As per Ohm's law we know that the current through a resistor is given as

$i = \frac{V}{R}$

here we know that

$R = \rho \frac{L}{A}$

here we know that the length of the cylinder is L and area is A so the value of current through the rod is given as

$i = \frac{V A}{\rho L}$

now we have change the length of the conductor to twice of initial value and rest all parameters will remain the same

so we will have

$i' = \frac{VA}{\rho (2L)}$

now from above two equations we have

$\frac{i}{i'} = 2$

so new current will become

$i' = \frac{i}{2}$

3 0

3 years ago

A 0.2 kg block of ice at 0°C is placed into a Styrofoam calorimeter cup with an unknown mass of water at 20°C. When thermal equi

Zanzabum

Answer:

Mass of the metal, m = 0.20 kg = 200 g

Initial temperature of the metal, T

= 150

Final temperature of the metal, T

= 40

Calorimeter has water equivalent of mass, m = 0.025 kg = 25 g

Volume of water, V = 150 cm

Mass (M) of water at temperature T = 27

150×1=150g

Fall in the temperature of the metal:

ΔT

-T

=150−40=110

Specific heat of water, C

=4.186J/g/K

Specific heat of the metal =C

Heat lost by the metal, =mCT .... (i)

Rise in the temperature of the water and calorimeter system: T

−T=40−27=13

Heat gained by the water and calorimeter system: =m

T=(M+m)C

T ....(ii)

Heat lost by the metal = Heat gained by the water and colorimeter system

mCΔT

=(M+m)C

200×C×110=(150+25)×4.186×13

C=(175×4.186×13)/(110×200)=0.43Jg

−1

If some heat is lost to the surroundings, then the value of C will be smaller than the actual value.

4 0

2 years ago

In order for an airplane to bank, does it need to accelerate

klemol [59]

I can tell. You're thinking that accelerate means speed up. it doesn't. Acceleration is any change in speed or direction. When an airplane is banking its direction is changing and that's acceleration. Even if the speed doesn't change.

5 0

2 years ago

When is the object stopped? A B C It is moving the entire time.

BARSIC [14]

Answer:

the object is stopped at B.

6 0

2 years ago