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3 years ago

in a given chemical reaction the energy of the products is greater than the energy of the reactants this is because

1 answer:

7 0

A reaction in which energy is absorbed from the surroundings is called an endothermic reaction. In endothermic reactions the enthalpy of the products is greater than the enthalpy of the reactants. Exothermic reactions heat up their surroundings while endothermic reactions cool them down.
I hope this helps you

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If the car has a mass of 0.2 kg, the ratio of height to width of the ramp is 12/75, the initial displacement is 2.25 m, and the

gtnhenbr [62]

Answer:

$L_f = 0.0196$

Explanation:

given,

mass of the car,m = 0.2 Kg

height to width of ramp, y/x = 12/75

initial displacement, L_i = 2.25 m

change in momentum, Δp = 0.58 kg.m/s

distance of change in direction of the ramp, L_f = ?

Using equation

$\Delta P = m \sqrt{\dfrac{2gy}{x}} (\sqrt{L_i}+\sqrt{L_f})$

inserting all the values

$0.58 = 0.2\times \sqrt{\dfrac{2\times 9.8\times 12}{75}} (\sqrt{2.25}+\sqrt{L_f})$

$1.5 + \sqrt{L_f} = 1.64$

$\sqrt{L_f}=0.14$

$L_f = 0.0196$

The car will cost back up to the distance of 0.0196 m

5 0

3 years ago

A disk of radius 10 cm speeds up from rest. It turns 60 radians reaching an angular velocity of 15 rad/s. What was the angular a

Kruka [31]

Answer: α = 1.875 rad/s²

Explanation:

ω₁² = ω₀² + 2αθ

ω₀ = 0

α = ω₁² / 2θ

α = 15² / 2(60)

α = 1.875 rad/s²

3 0

2 years ago

3.3 kg block is on a perfectly smooth ramp that makes an angle of 52° with the horizontal. (a) What is the block's acceleration

Alexus [3.1K]

Answer:

a) a = 7.72 m / s², N = 19.9 N and b) F = 25.5 N

Explanation:

To solve this problem we will use Newton's second law, let's set a reference system with an axis parallel to the plane and gold perpendicular axis. Let's break down the weight (W)

sin52 = Wx / W

cos52 = Wy / W

Wx = W sin52

Wy = w cos 52

Let's write them equations

X axis

Wx = ma

Y Axis

N-Wy = 0

N = Wy

a) Let's calculate the acceleration

a = W sin52 / m = mg sin 52 / m

a = g sin 52

a = 9.8 sin52

a = 7.72 m / s²

The force of the ramp is normal

N = Wy = mg cos 52

N = 3.3 9.8 cos 52

N = 19.9 N

b) For the block to move at constant speed the sum of force on the axis must be zero,

F - Wx = 0

F = Wx

F = mg sin52

F = 3.3 9.8 sin 52

F = 25.5 N

Parallel to the plane and going up

3 0

3 years ago

Help (๑¯◡¯๑)me please

Allushta [10]

Answer:

<h3>Young modulus of elasticity for a gas is</h3><h2>Zero</h2>

Explanation:

As the gas doesn't undergo any changes 

so the young modules of gas is not defined...

4 0

2 years ago

Read 2 more answers

A student performed the following steps to find the solution to the equation x^2-2x-15=0 Where did the student go wrong? STEP 1:

AveGali [126]

B. In step 3

They incorrectly solved for x. It should have been x=-3 and x=5

3 0

3 years ago