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4 years ago

What are three (3) things you can do before exercise or sports that will keep you safe?

Physics

1 answer:

zaharov [31]4 years ago

3 0

Answer: Drink water, practice, do some light stretches

Explanation:

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Which best describes the characteristics of a river basin

kicyunya [14]

River basin characteristics:

- tributaries
- area of land
- precipitation collects
- water drainage
- flowing water

Hope I helped. Please vote my answer branliest! Thanks.

7 0

4 years ago

Read 2 more answers

A ramp is often used to raise an object. if 90 joules of energy are needed to lift an object to a platform but 100 joules are us

vova2212 [387]

100 Joules have been used to roll the object up the ramp, but only 90 Joules were actually needed to lift the object, this means that 10 Joules have been wasted in the form of heat due to the friction between the object and the ramp, and this corresponds to
$\frac{10 J}{100 J} \cdot 100 = 10 \%$
so, 10 % of the energy.

8 0

3 years ago

What is the final velocity of a car that is originally traveling 12 m/s and then undergoes an acceleration of 2.3m/s squared for

Katarina [22]

To solve this problem we use the general kinetic equations.

We need to know the time it takes for the car to reach 130 meters.

In this way we have to:

$x(t) = x_0 + v_0t + 0.5at ^ 2$

Where

$x_0$ = initial position

$v_0$ = initial velocity

$a$ = acceleration

$t$ = time

$x(t)$ = position as a function of time

$130 = 0 + 12(t) + 0.5(2.3)t ^ 2$

$1.15t ^ 2 + 12t - 130$ .

We use the quadratic formula to solve the equation.

$t = \frac{-12 \± \sqrt {(12) ^ 2-4(1.15)(- 130)}}{2 (1.15)}$

t = 6.63 s and t = -17.1 s

We take the positive solution. This means that the car takes 6.63 s to reach 130 meters.

Then we use the following equation to find the final velocity:

$v_f = v_0 + at$

Where:

$v_f$ = final speed

$v_f = 12 +2.23(6.63)$

The final speed of the car is 27.25 m/s

3 0

4 years ago

Summarize the four main hypotheses for the origin of the Moon.

LekaFEV [45]

Answer:

Summarized

Explanation:

Among the many hypotheses proposed for the origin of the moon the four main are summarized as

the fission hypotheses in which moon was once a part of earth but got separated due to collision. The second hypotheses is that the moon formed along with the Earth but independently.Moon was formed else where in the solar system and got captured by the Earth's gravitational pull. The newer giant impact hypotheses suggest that a mars sized object grazed Earth, Ejecting material from both Earth and itself, that material condensed to form moon.

8 0

3 years ago

An object accelerates from 20 m/s down to 10 m/s in 5 seconds.

DedPeter [7]

Answer:

The acceleration of the object is $-2\ \frac{m}{sec^2}$