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3 years ago

5. A boy rides his skateboard 50 meters (m) West. Then he turns around

Physics

1 answer:

Ann [662]3 years ago

5 0

Answer:

-30 m

Explanation:

50-20 but the direction is going west so it’s negative

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Imagine you are a TV sports commentator for a major car race. What techniques could

pashok25 [27]

Answer:

friction , magnetism etc

8 0

3 years ago

A 15.7-g aluminum block is warmed to 53.2 °c and plunged into an insulated beaker containing 32.5 g of water initially at 24.5 °

ipn [44]

The equilibrium temperature of aluminium and water is 33.2°C

We know that specific heat of aluminium is 0.9 J/gm-K, and that of water is 1 J/gm-K

Now we can calculate the equilibrium temperature

(mc∆T)_aluminium=(mc∆T)_water

15.7*0.9*(53.2-T)=32.5*1*(T-24.5)

T=33.2°C

6 0

4 years ago

Read 2 more answers

During their physics field trip to the amusement park, Tyler and Maria took a rider on the Whirligig. The Whirligig ride consist

blondinia [14]

Answer:

Speed = 7.04434 m/s

Explanation:

Given that:

The radius of the circle = 6.5 m

The expression for the calculation of circumference is shown below as:

$Circumference=2\times \pi \times radius$

Thus,

$Circumference=2\times \frac{22}{7} \times 6.5\ m=40.8572\ m$

Time taken = 5.8 seconds.

Thus, The speed is:

$Speed=\frac{Circumference}{Time\ Taken}$

So,

$Speed=\frac{40.8572}{5.8}\ m/s$

<u>Speed = 7.04434 m/s</u>

8 0

4 years ago

Read 2 more answers

Examples for inertia

Lerok [7]

One's body movement to the side when a car makes a sharp turn.

Tightening of seat belts in a car when it stops quickly.

A ball rolling down a hill will continue to roll unless friction or another force stops it.

Men in space find it more difficult to stop moving because of a lack of gravity acting against them.

6 0

4 years ago

Which circle has minimum flux in the following figure?

Feliz [49]

Answer:

Circle Q

Explanation:

The flux of a field through a surface is given by:

$\Phi = F A cos \theta$

where

F is the field strength

A is the area of the surface

$\theta$ is the angle between the direction of the field and the normal to the surface

In the figure, we see that the 4 surfaces have different orientations, so different angle $\theta$ . In the formula, we see that the flux is maximum when $\theta=0^{\circ}$ , which occurs when the field is perpendicular to the surface, and the flux is zero when $\theta=90^{\circ}$ , (because $cos 90^{\circ}=0$ ) which occurs when the field is parallel to the surface.

In the figure, we see that circle Q is parallel to the direction of the field, so in this case the field is zero, while in all the other cases is not.

So, the correct answer is

Circle Q

6 0

4 years ago