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2 years ago

What do you mean by solar energy?

Physics

1 answer:

dezoksy [38]2 years ago

8 0

Answer:

Solar energy is radiant light and heat from the Sun that is harnessed using a range of technologies such as solar power to generate electricity, solar thermal energy including solar water heating, and solar architecture.

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When a ball increases in speed by the same amount each second its acceleration?

MAXImum [283]

Its acceleration is constant.

5 0

4 years ago

You have been called to testify as an expert witness in a trial involving a head-on collision. Car A weighs 690.0 kg and was tra

butalik [34]

Answer:

The speed of car A before collision is 3.5 km/h.

Explanation:

Mass of car A = 690 kg eastwards

Mass of car B = 520 kg at 74 km/h west wards

Distance, s = 6 m

coefficient of friction = 0.75

Let the speed after collision is v.

Use third equation of motion

$v^2 = u^2 + 2 as \\\\0 =v^2- 2 \times 0.75\times9.8\times 6\\\\v = 9.4 m/s = 33.84 km/h$

Let the initial speed of car A is v'.

Use conservation of momentum

690 x v' - 520 x 74 = (690 + 520) x 33.8

690 v' + 38480 = 40898

v' = 3.5 km/h

8 0

3 years ago

Ftension = 120 N

weqwewe [10]

Answer:

98Kg

Explanation:

5 0

3 years ago

The drag force Fd, imposed by the surrounding air on a vehicle moving with velocity V is given by:

faltersainse [42]

Answer:

Explanation:

Given that:

V = 25 mi/hr

To ft/sec, we have:

$V = 25 \times \dfrac{5280}{3600} ft/s$

$V = \dfrac{110}{3} ft/s$

$\rho = 0.075 \ lb/ft^3$

$\rho = 0.075 \times \dfrac{1 \ lbf s^2/ft}{32.174 \ lbm}$

$\rho = \dfrac{0.075}{32.174 } lbf.s^2/ft^4$

$C_d = 0.28$

A = 25ft²

Recall that:

The drag force $F_d =\dfrac{C_dA \rho V^2}{2}$

$F_d =\dfrac{1}{2}\times 0.28 \times 25\times \dfrac{0.075}{32.174}\times (\dfrac{110}{3})^2$

$F_d =10.967 \ lbf$

$P = F_dV \\ \\ P = 10.97 \times (\dfrac{110}{3}} \\ \\ P = 402.3 \ hp$

For 70 miles per hour, we have:

$V = 70 \times \dfrac{5280}{3600} ft/s$

$V = \dfrac{308}{3} ft/s$

The drag force $F_d =\dfrac{C_dA \rho V^2}{2}$

$F_d =\dfrac{1}{2}\times 0.28 \times 25\times \dfrac{0.075}{32.174}\times (\dfrac{308}{3})^2$

$F_d =85.99 \ lbf$

$P = F_dV \\ \\ P = 85.99 \times (\dfrac{308}{3}}) \\ \\ P = 8828.2 \ hp$

4 0

3 years ago

Ali"s family has a farm near the coast. winds are constantly carrying away soil during the winter when no crops are growing. wha

Vaselesa [24]

Answer:

Mulching often acts as a soil insulator that helps to maintain soil moisture while promoting the growth of grass and plants. It is used as a temporary soil stabilizer. Moreover, with proper application, mulching can help to keep soil in place for a few days.

3 0

3 years ago

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What do you mean by solar energy?​

What do you mean by solar energy?