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3 years ago

Also, I need the answer in like 5 mins. This is kinda hard for me can someone help me. It's about the solar system.

Physics

1 answer:

WARRIOR [948]3 years ago

4 0

Answer:

North star, its close to our solar system but not in it. hope this helps

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A 13-KG SLED IS MOVING AT A SPEED OF 3.0M/S. AT WHICH OF THE FOLLOWING SPEEDS WILL THE SLED HAVE TWICE AS MUCH KINETIC ENERGY

N76 [4]

<span>4.2m/s
KE =(1/2)mv^2
insert your numbers to find how much kinetic energy you have.
then double that number and solve for v
which gives you how fast the sled will have to go in order to reach that kinetic energy</span>

8 0

4 years ago

0.054x2.33x90............

guapka [62]

please mark this answer as brainlist

5 0

3 years ago

Collette has a prediction that college students ' immune systems have declined due to the use of hand sanitizers . This idea is

Nataly_w [17]

The idea that "students ' immune systems have declined due to the use of hand sanitizers " is a hypothesis.

The term hypothesis refers to an intelligent guess or idea often based which is subject to scientific investigation via experiments.

A hypothesis may be right or wrong. We can only prove a hypothesis by subjecting it to a series of rigorous experiments.

Thus Collette's idea is a hypothesis.

Learn more: brainly.com/question/18284466

5 0

3 years ago

A cube measures 3 cm on each side and has a mass of 25 g. What is its density.

Snowcat [4.5K]

Answer:

The density is: $0.926 \,\frac{g}{cm^3}$

Explanation:

Recall that density is defined as the quotient of the object's mass divided by volume. So, we calculate the volume of the 3 cm side cube:

$Vol = (3 \,cm)^3 = 27 \,\,cm^3$

then the density becomes:

$density=\frac{mass}{Vol} =\frac{25}{27} \,\frac{g}{cm^3} \approx 0.926 \,\frac{g}{cm^3}$

7 0

4 years ago

Two friends of different masses are on the playground. They are playing on the seesaw and are able to balance it even though the

Westkost [7]

Answer:

They are able to balance torques due to gravity.

$F_1 L_1 = F_2L_2$

Explanation:

When two friends of different masses will balance themselves on see saw then at equilibrium position the see saw will remain horizontal

This condition will be torque equilibrium position where the see saw will not rotate

Here we can say

$F_1 L_1 = F_2L_2$

here we know that force is due to weight of two friends

and their positions are different with respect to the lever about which see saw is rotating

since both friends are of different weight so they will balance themselves are different positions as per above equation

5 0

4 years ago