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yawa3891 [41]
3 years ago
12

Refraction occurs when __________.

Physics
2 answers:
katovenus [111]3 years ago
8 0
<span>Refraction occurs when a wave enters a new medium
and its speed changes. </span>
ser-zykov [4K]3 years ago
4 0
Refraction occurs when a wave enters a new medium and changes its speed.

i hope this helps 
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Determine the amount of work done on an ideal gas as it is heated in an enclosed thermally insulated cylinder topped with a free
sp2606 [1]

Answer:

W = 3/2 n (T₁- T₂)

Explanation:

Let's use the first law of thermodynamics

           ΔE = Q + W

in this case the cylinder is insulated, so there is no heat transfer

           ΔE = W

internal energy can be related to the change in temperature

            ΔE = 3/2 n K ΔT

we substitute

           3/2 n (T₂-T₁) = W

as the work is on the gas it is negative

            W = 3/2 n (T₁- T₂)

3 0
3 years ago
What is the maximum acceleration the belt can have without the crate slipping? express your answer using two significant figures
Montano1993 [528]

To prevent the crate from slipping, the maximum force that the belt can exert on the crate must be equal to the static friction force.


Ff = 0.5 * 16 * 9.8 = 78.4 N

a = 4.9 m/s^2


If acceleration of the belt exceeds the value determined in the previous question, what is the acceleration of the crate?


In this situation, the kinetic friction force is causing the crate to decelerate. So the net force on the crate is 78.4 N minus the kinetic friction force.


Ff = 0.28 * 16 * 9.8 = 43.904 N

Net force = 78.4 – 43.904 = 34.496 N

To determine the acceleration, divide by the mass of the crate.

a = 34.496 ÷ 16 = 2.156 m/s^2



8 0
3 years ago
HELLLPPP FAST PLS
r-ruslan [8.4K]

Answer:

Oh I had this question before! :)

Explanation:

Acid - citrus products - the classic one is lemon juice

Anything with a sour taste is acidic

Base - soap, oven cleaner, drain cleaner, baking soda

Basic things are bitter (please don't taste the drain cleaner and oven cleaner)

3 0
3 years ago
6. A car, 1110 kg, is traveling down a horizontal road at 20.0 m/s when it locks up its brakes. The coefficient of friction betw
USPshnik [31]

Answer:

x=22.65m

Explanation:

We have an uniformly accelerated motion, with a negative acceleration. Thus, we use the kinematic equations to calculate the distance will it take to bring the car to a stop:

v_f^2=v_0^2-2ax\\\frac{0^2-v_0^2}{-2a}=x\\x=\frac{v_0^2}{2a}

The acceleration can be calculated using Newton's second law:

\sum F_x:F_f=ma\\\sum F_y:N=mg

Recall that the maximum force of friction is defined as F_f=\mu N. So, replacing this:

\mu N=ma\\\mu mg=ma\\a=\mu g\\a=0.901(9.8\frac{m}{s^2})\\a=8.83\frac{m}{s^2}

Now, we calculate the distance:

x=\frac{v_0^2}{2a}\\x=\frac{(20\frac{m}{s})^2}{2(8.83\frac{m}{s^2})}\\x=22.65m

7 0
3 years ago
which is not part of maturity? excising self control, using good judgement, making impulsive decisions, being dependable
IgorLugansk [536]

Answer:

using good judgement

Explanation:

7 0
2 years ago
Read 2 more answers
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