PLZ HELP!!I WILL MAKE YOUR ANSWER BRAINLIEST!!!!!

harina [27]

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3 0

3 years ago

Can the distance coverd by a body ever be negative? What about its distance and displacement

Tju [1.3M]

answer in photo enjoy

4 0

3 years ago

QUESTION: A study group of students is reviewing claims in an article that gamma rays are among the most dangerous type of elect

Lubov Fominskaja [6]

B

Bias is an inclination towards one way of thinking due to inherent factors in our environment, such as how one was brought up.

Explanation:

In science, biases, conscious or unconscious, tend to make experiments’ results to incline in particular way rather than being impartial. Peer- review of scientific journals by the scientific community is meant to be a quality assurance measure to detect such biases. The students should check reviews of the scientific community on the article and see if any biases have been pointed out. Probably the institution that the scientist works for is in competition with another institution that deals with gamma rays.

Learn More:

brainly.com/question/1903490

brainly.com/question/8480257

#LearnWithBrainly

4 0

3 years ago

Read 2 more answers

"A 3 kg crate slides down a ramp. The ramp is 1 m in length and inclined at an angle of 30 degrees. The crate starts from rest a

OlgaM077 [116]

Answer:

v = 2.57 m /sec

Explanation: See Annex Free Body Diagram

From free body diagram and Newton´s second law we have

There is not movements in the y axis direction

cos 30° = √3/2 sin 30° = 1/2

We have P = mg = 3 Kg * 9.8 m/sec²

P = 29.4 Kg*m/ sec² P = 29.4 [N]

Py = P * cos 30° Py = 29.4 [N] * √3/2 ⇒ Py = 25.43 [N]

Px = P * sin 30° Px = 29.4 [N] * 1/2 ⇒ Px = 14.7 [N]

∑ F = m* a ⇒ ∑ Fy = 0 ∑ Fx = m *a

∑ Fy = Fn - Py = 0 Py = P*cos30° Py = 25.43 [N]

Fn = 25.43 [N]

Fr = μk * Fn ⇒ Fr = 0.19 * 25.43 ⇒ Fr = 4.83 [N]

Now

∑ Fx = m *a mg sin30° - Fr = m*a ⇒ Px - Fr = m*a

14.7 [N] - 4.83 [N] = 3 [kg] * a ⇒ 9.87 /3 = a [m /sec²]

a = 3.29 [m/sec²]

From uniformly accelerated movement

distance = x₀ + V₀*t ± at²/2 but x₀ and V₀ = 0

Then

d = ( 1/2 )*a*t² ⇒ 1 [m] * 2 = 3.29 [m/sec²] * t²

t = 0.78 sec

And finally

v = a*t ⇒ v = 3.29 *(.78) ⇒ v = 2.57 m /sec

5 0

3 years ago

Ilya and Anya each can run at a speed of 7.30 mph and walk at a speed of 4.00 mph. They set off together on a route of length 5.

katrin [286]

Answer:

a)0.9675 h

b)5.168 mph

c)0.885 h

d)5.65 mph

Explanation:

The distance travelled by a moving object can be calculated as the velocity multiplied by the time, for this problem we can divide the problem in two stages, one where the are walking and another where they run,

Considering the total time for Anya is $t_{a}$ :