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3 years ago

4 answers. Anyone know?

Physics

2 answers:

Radda [10]3 years ago

8 0

Answer:

lift

weight

thrust

air resistance

Explanation:

plz mark me as brainliest

pickupchik [31]3 years ago

4 0

Answer: Upthrust, lift, air resistance, and thrust

Explanation:

All of these 4 elements are taken into account during the design and creation of a plane.

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Use the work-energy theorem to determine the force required to stop a 1000 kg car moving at a speed of 20.0 m/s if there is a di

Vlad1618 [11]

Answer:

4.44 kN in the opposite direction of acceleration.

Explanation:

Given that, the initial speed of the car is, $u=20m/s$

And the mass of the car is, $m=1000 kg$

The total distance covered by the car before stop, $s=45m$

And the final speed of the car is, $u=0m/s$

Now initial kinetic energy is,

$KE_{i}=\frac{1}{2}mu^{2}$

Substitute the value of u and m in the above equation, we get

$KE_{i}=\frac{1}{2}(1000kg)\times (20)^{2}\\KE_{i}=20000J$

Now final kinetic energy is,

$KE_{f}=\frac{1}{2}mv^{2}$

Substitute the value of v and m in the above equation, we get

$KE_{f}=\frac{1}{2}(1000kg)\times (0)^{2}\\KE_{i}=0J$

Now applying work energy theorem.

Work done= change in kinetic energy

Therefore,

$F.S=KE_{f}-KE_{i}\\F\times 45=(0-200000)J\\F=\frac{-200000J}{45}\\ F=-4444.44N\\F=-4.44kN$

Here, the force is negative because the force and acceleration in the opposite direction.

6 0

3 years ago

What type of feeder is a snake? *

bija089 [108]

Answer:

slender-bodied non-stinging insect having iridescent wings that are outspread at rest; adults and nymphs feed on mosquitoes etc.

Explanation:

I hope this works. I have a snake and it helps to know this stuff

3 0

3 years ago

When you break a magnet in half how many poles does each piece have and explain

eimsori [14]

2 poles. Induction will make the broken end into a new pole with the opposite charge of the remaining pole

8 0

3 years ago

True or False: Dimensional analysis can give you the numerical

Serjik [45]

Dimensional analysis is a method of checking the dimensions of each value in an equation. I will give you an example.

$E=mc^2$

Is a know equation which equates energy and mass. So our question is, is this true or not? The method is following:

knowing that c has the dimension of [m/s] and m has [kg], what is the dimension of E? So here the dimensional analysis begins.

$E = mc^2 \Rightarrow [E] = \text{kg} \cdot \left( \frac{\text{m}} {\text{s}}\right)^2 = \text{kgms}^{-2}$

This can be used also to solve "equations" to prove certain dimensions of unknown constants.

4 0

3 years ago

If Earth orbited the Sun at the distance of Jupiter, the diameter of its orbit would be about five times greater than its actual

Travka [436]

Answer:

by increasing the diameter, the parallactic angle increases

Explanation:

4 0

4 years ago

4 answers. Anyone know?​

4 answers. Anyone know?